Gleichmässig gefärbte Gerüstkeramik sowie Färbelösung

PROCEDURE FOR THE PRODUCTION OF DENTURE

PROCEDURE FOR DIMENSION-FAITHFUL SINTERING OF CERAMIC(S)

BLANK FROM ZIRCON OXIDE CERAMICS WITH OXIDIC ADDITIVE AND ITS USE

PROCEDURE FOR THE PRODUCTION OF DENTURE

DEVICE AND PROCEDURE FOR DIMENSION-STABLE SINTERING OF VORGEFOMTEN CERAMIC ARTICLES

COMPOSITION FOR THE ATTACHMENT OF A TOOTH GLARE ON A TOOTH SUPPORTING STRUCTURE, A PROCEDURE AND A USE OF IT

Blank comprised of a zirconium oxide ceramic with an oxidic additive and the use thereof

METHOD OF PRODUCING A DENTAL RESTORATION, DENTAL RESTORATION AND USE THEREOF

The invention relates to a method of producing a dental restoration (40), the method comprising the steps of providing a metallic frame (21) having an inner and an outer surface, applying one or more opaque layer(s) (23) or composition on the outer surface of the metallic frame, providing a facing precursor (31) having a volume A, mating the facing precursor on the outer surface of the metallic frame coated with the opaque layer using a mating composition to obtain a dental restoration intermediate, firing the dental restoration intermediate to a temperature where the facing precursor sinters to obtain a sintered facing having the volume B, and optionally applying a stain and/or glacing layer on the outer surface of the sintered facing. The invention also relates to a dental restoration obtainable by such a process.

VERFAHREN ZUR HERSTELLUNG EINES POROESEN FORMKOERPERS

COLOURING SOLUTION FOR DENTALE CERAMIC(S) ARTICLE AND EQUIVALENT PROCEDURE

Method for producing a dental prosthesis

RESTORATION, RESTORATION COMPONENTS, AND METHODS OF MAKING A DENTAL RESTORATION

A method is provided for making a dental restoration at a certain tooth color shade. The method comprises joining a veneer precursor, a framework and a compensation material to form the dental restoration. The tooth color shade is selected from among a continuous range of tooth color shades, but individual components of the dental restoration may be selected from discrete color shades. Further, a dental restoration, a kit and a use of the kit are provided in accordance with the invention.

PROCEDURE FOR THE PRODUCTION OF A POROUS MOLDED ARTICLE.

EVENLY COLORING STAND CERAMIC(S) AS WELL AS COLORING SOLUTION

Method of making a facing for a dental restoration, facing for a dental restoration, and method of making a dental restoration

A method of making a facing for a dental restoration. The method comprises the step of providing a facing precursor from which the facing is obtainable, and wherein the facing precursor is comprised of an open-celled material. The method provides for efficient manufacturing of dental restorations with optimized characteristics.

Method for dimensionally sintering ceramics

ROHLING AUS ZIRKONOXIDKERAMIK MIT OXIDISCHEM ZUSATZ UND DESSEN VERWENDUNG

Coloring ceramics by way of ionic or complex-containing solutions

Uniformly coloured ceramic framework and ceramic colouring solution

Method for producing a dental prosthesis

SYSTEMS AND METHODS FOR MAKING LAYERED DENTAL APPLIANCES

A system and method for making a layered dental appliance. The system can include a mold comprising a negative of an outer shape of a layered dental appliance, and a dental core dimensioned to be at least partially received in the mold. The method can include positioning a first slurry in the mold, and pressing the dental core into the first slurry in the mold to form a first article comprising the dental core and a first layer formed from the first slurry. The method can further include removing the first article from the mold, and firing the first article. The method can further include positioning a second slurry in the mold, and pressing the first article into the second slurry in the mold to form a second article comprising the dental core, the first layer, and a second layer formed from the second slurry.

Aerogels, calcined and crystalline articles and methods of making the same

Aerogel, calcined articles, and crystalline articles comprising ZrO2. Exemplary uses of the crystalline metal oxide articles include dental articles (e.g., restoratives, replacements, inlays, onlays, veneers, full and partial crowns, bridges, implants, implant abutments, copings, anterior fillings, posterior fillings, and cavity liner, and bridge frameworks) and orthodontic appliances (e.g., brackets, buccal tubes, cleats, and buttons).

Blank comprised of a zirconium oxide ceramic with an oxidic additive and the use thereof

Uniformly coloured ceramic framework and ceramic colouring solution

VERFAHREN ZUM DIMENSIONSTREUEN SINTERN VON KERAMIK

Verfahren zur Herstellung von Zahnersatz

Die Erfindung betrifft ein Verfahren zur Herstellung von Zahnersatz aus einem vorgesinterten Rohling in einer Bearbeitungsmaschine, wobei der Rohling eine Rohbruchfestigkeit von 15 bis 30 MPa aufweist.

Method for producing dentures

Coloring ceramics by way of ionic or complex-containing solutions

Blank comprised of a zirconium oxide ceramic with an oxidic additive and the usethereof

Uniformly coloured ceramic framework and colouring solution

Method for dimensionally sintering ceramics

Processing of shape data of a dental prosthesis

AEROGELS, CALCINED AND CRYSTALLINE ARTICLES AND METHODS OF MAKING THE SAME

Aerogel, calcined articles, and crystalline articles comprising ZrO. Exemplary uses of the crystalline metal oxide articles include dental articles (e.g., restoratives, replacements, inlays, onlays, veneers, full and partial crowns, bridges, implants, implant abutments, copings, anterior fillings, posterior fillings, and cavity liner, and bridge frameworks) and orthodontic appliances (e.g., brackets, buccal tubes, cleats, and buttons). 120.-. (canceled)21. A monolithic aerogel comprising organic material and crystalline metal oxide particles , wherein the crystalline metal oxide particles are in a range from 3 to 20 volume percent , based on the total volume of the monolithic aerogel , wherein at least 70 mole percent of the crystalline metal oxide is ZrO.22. The monolithic aerogel of claim 21 , wherein the crystalline metal oxide particles are in a range from 1 to 15 mole percent of the crystalline metal oxide is YO.23. The monolithic aerogel of claim 21 , wherein the crystalline metal oxide particles have an average primary particle size in a range of 2 nanometers to 50 nanometers.24. The monolithic aerogel of claim 21 , wherein the crystalline material further comprises at least one of YOor LaO.25. The monolithic aerogel of claim 21 , wherein the ZrOis all tetragonal or cubic.26. The aerogel of claim 21 , wherein the organic content in a range of 3 to 30 percent by weight claim 21 , based on the total weight of the aerogel.27. The aerogel of claim 21 , wherein the aerogel has a surface area in a range of 100 m/gram to 300 m/gram.28. The aerogel of claim 21 , wherein an average connected pore size is in a range of 10 nanometers to 20 nanometers.29. The aerogel of claim 21 , wherein the aerogel is crack-free.30. The aerogel of claim 21 , wherein the organic material content is in a range of 3 to 30 weight percent claim 21 , based on a total weight of the aerogel.31. The aerogel of claim 21 , wherein the crystalline metal oxide particles further comprise at least ...

COLOURING SOLUTION FOR DENTAL CERAMIC FRAMEWORK AND RELATED METHODS

The invention relates to a colouring solution for dental ceramic framework comprising a solvent, a colouring agent comprising metal ions, and a complexing agent, wherein the amount of complexing agent is sufficient to dissolve the colouring agent in the solvent. The invention also relates to a process for colouring dental ceramic framework and dental ceramic framework coloured with the colouring solution.

VERFAHREN ZUR HERSTELLUNG EINES POROESEN FORMKOERPERS.

... (A) A porous sintered SiC article is made by (a) suspending sinterable SiC powder with free carbon and aluminium and/or boron additives in a solvent with a binder; (b) atomising the suspension to droplets of size considerably greater than the powder particle size; (c) drying the droplets in the atomised stream to form a shape-stable granulate with spherical grains: (d) plascing a negative mould in the granulate stream for uniform coating with the granulate, the grains retaining their spherical form and adhering to the negative mould; and (e) drying the resulting layer and, after attaining sufficient green strength, removing the layer from the negative mould and subjecting it to sintering. (B) Also claimed is a similar process comprising steps (a) to (c), followed by (d') processing the granulate to a pressable or castable material by addn. of a plasticiser which does not react chemically with the binder and does not dissolve, soften or swell the binder; (e') forming a green body from the ...

Device and process for dimensionally stable sintering of ceramic pre-shaped articles

The present invention relates to a device and process for dimensionally stable sintering of ceramic pre-shaped dental articles, the device comprising a suspension system having a base structure with at least one suspension point at a height suitable for suspending an article to be sintered; and a suspension element moveably connected to said suspension point for supporting said article to be sintered, wherein said suspension element itself forms a swing on which said article to be sintered is arrangeable.

Zirconia-based material doped with yttrium and lanthanum

Sintered bodies containing zirconia-based ceramic materials and partially sintered bodies that are intermediates in the preparation of the sintered bodies are described. The zirconia-based ceramic material is doped with lanthanum and yttrium. The grain size of the zirconia-based ceramic material can be controlled by the addition of lanthanum. The crystalline phase of the zirconia-based ceramic material can be influenced by the addition of yttrium.

METHOD OF PRODUCING DENTAL PROSTHESIS

PROBLEM TO BE SOLVED: To provide a method of producing a dental prosthesis and pre-sintered blank of zirconium oxide ceramic having a green strength of within a selection range. SOLUTION: The invention relates to a method of producing a dental prosthesis, comprising the steps: (a) preparation of a blank, (b) machining of the blank by milling processes, (c) dense-sintering of the blank in a temperature range of from 1,200 to 1,650°C, the blank comprising a pre-sintered material and having a green strength of from 31 to 50 MPa. COPYRIGHT: (C)2008,JPO&INPIT ...

VORRICHTUNG UND VERFAHREN ZUM DIMENSIONSSTABILEN SINTERN VON VORGEFOMTEN KERAMISCHEN ARTIKELN

ZIRCONIA BODY AND METHODS

A translucent zirconia sintered body, a dental article comprising a shaped, translucent zirconia body, a zirconia green body, and methods of making a translucent zirconia sintered body, methods of making a dental article comprising a shaped, translucent zirconia body, and methods of making a zirconia green body are described.

Gleichmässig gefärbte Gerüstkeramik sowie Färbelösung

Methods for making layered dental appliances

A system and method for making a layered dental appliance. The system can include a mold comprising a negative of an outer shape of a layered dental appliance, and a dental core dimensioned to be at least partially received in the mold. The method can include positioning a first slurry in the mold, and pressing the dental core into the first slurry in the mold to form a first article comprising the dental core and a first layer formed from the first slurry. The method can further include removing the first article from the mold, and firing the first article. The method can further include positioning a second slurry in the mold, and pressing the first article into the second slurry in the mold to form a second article comprising the dental core, the first layer, and a second layer formed from the second slurry.

Verarbeitung von Gestaltdaten einer Dentalprothese

Verfahren zur Verarbeitung von Daten über die dreidimensionale Gestalt einer dentalen Prothese, die zwei Prothesenabschnitte und einen mit diesen verbundenen Verbindungsabschnitt aufweist, welches Verfahren die Schritte aufweist, dass: für den Verbindungsabschnitt ein Stabilitätsparameter und ein Stabilitätskriterium bestimmt werden; für den Stabilitätsparameter aus den Daten der Ist-Wert berechnet wird, sobald eine Änderung der Daten durch einen Anwender erfolgt; für den Verbindungsabschnitt geprüft wird, ob der Ist-Wert das Stabilitätskriterium erfüllt, und falls nein ein Warnsignal erzeugt wird, die Daten derart geändert werden, dass die Stabilität des Verbindungsabschnitts vergrößert wird, und der Anwender über die Änderung informiert wird, wobei das Stabilitätskriterium abhängt von: der Konfiguration der Prothese und/oder der Position der Prothese im Mund und/oder dem Material und/oder dem Querschnittsprofil des Verbindungsabschnittes und/oder der Art der an den Verbindungsabschnitt ...

Verfahren zum dimensionstreuen Sintern von Keramik

The invention relates to a method for sintering ceramic molded articles which allows for the true dimensions of the articles. According to the inventive method, the material to be sintered is stored on non-metal covered support devices during sintering which automatically adjust themselves to the dimensional losses due to the shrinkage occurring during sintering or which allow a contactless storage of the molded articles.

Einfärbung von keramischem Zahnersatz mittels ionischer oder komplexhaltiger Lösungen

Verfahren zum Einfärben von keramischem Zahnersatz im porösen oder saugfähigen Zustand mit Metallionen-Lösungen oder Metallkomplex-Lösungen, wobei Dentalkeramiken im vorgesinterten Zustand eingefärbt werden und die Konzentration der Lösungen 0,001 bis 6 Gew.-% beträgt, die ionischen oder komplexhaltigen Lösungen auf wäßriger oder alkoholischer Basis sind, als keramischer Zahnersatz die hochfesten Oxide von Al2O3, ZrO2 sowohl teil- als auch vollstabilisiert, und deren Mischungen verwendet werden und es sich bei der Dentalkeramik um eine Gerüstkeramik handelt.

VERFAHREN ZUR HERSTELLUNG VON ZAHNERSATZ

Verfahren zum dimensionstreuen Sintern von Keramik und keramisches Zahnersatzteil

Verfahren zum dimensionstreuen Sintern von keramischen Formgegenständen (1), wobei die Formgegenstände (1) während des Sinterns auf geeigneten Trägervorrichtungen gelagert werden, welche sich an die während des Brennprozesses auftretenden Schwunddimensionen anpassen, wobei die Lagerung der Formgegenstände (1) auf Trägervorrichtungen erfolgt, die aus dem gleichen Material bestehen wie die Formgegenstände (1) und Trägervorrichtung und Formgegenstände (1) aus demselben Rohling gefertigt sind, und wobei die Formgegenstände (1) über Haltestege (3) mit einer planen Fläche verbunden sind. Method for dimensionally accurate sintering of shaped ceramic articles (1), the shaped articles (1) being stored during sintering on suitable carrier devices which adapt to the shrinking dimensions occurring during the firing process, the shaped articles (1) being stored on carrier devices which consist of the same material as the shaped objects (1) and the carrier device and shaped objects (1) are made from the same blank, and the shaped objects (1) are connected to a flat surface by means of retaining webs (3).

Method and system for making a dental restoration

A method and system for making a dental restoration are provided. The method comprises the step of providing a computer model of a three-dimensional reference surface that is based for example on a tooth structure of a tooth to be restored in a patient's dentition. The method further comprises the steps of visualizing the three-dimensional reference surface, providing a user operable virtual material deposition tool, and using the virtual material deposition tool to deposit a plurality of differently colored layers on the reference surface. The system provides functionality to perform the method of the invention. The invention preferably helps maximizing optical and geometrical quality in a dental restoration.

Aerogels, calcined and crystalline articles and methods of making the same

Aerogel, calcined articles, and crystalline articles comprising ZrO2. Exemplary uses of the crystalline metal oxide articles include dental articles (e.g., restoratives, replacements, inlays, onlays, veneers, full and partial crowns, bridges, implants, implant abutments, copings, anterior fillings, posterior fillings, and cavity liner, and bridge frameworks) and orthodontic appliances (e.g., brackets, buccal tubes, cleats, and buttons).

Dental blank comprising a pre-sintered porous zirconia material, process of|its production and dental article formed from said dental blank

The invention relates to a dental mill blank comprising a pre-sintered porous zirconia material, the porous pre-sintered zirconia material showing a N2 adsorption of isotherm type IV according to IUPAC classification, the porous pre-sintered zirconia material having a Vickers hardness from about 25 to about 150, the dental mill blank comprising means for reversible attaching it to a machining device. The invention also relates to a process of producing a zirconia dental article comprising the steps of providing a dental mill blank comprising a porous pre-sintered zirconia material, placing the dental mill blank in a machining device, machining the porous zirconia material and to a dental article obtained by such a process.

DEVICE AND PROCESS FOR DIMENSIONALLY STABLE SINTERING OF CERAMIC PRE-SHAPED ARTICLES

Device and Process for dimensionally stable sintering of ceramic pre-shaped articles The present invention relates to a device and process for dimensionally stable sintering of ceramic pre-shaped dental articles, the device comprising a suspension system having a base structure with at least one suspension point at a height suitable for suspending an article to be sintered; and a suspension element moveably connected to said suspension point for supporting said article to be sintered, wherein said suspension element itself forms a swing on which said article to be sintered is arrangeable. © KIPO & WIPO 2008 ...

COLOURING SOLUTION FOR SELECTIVELY TREATING THE SURFACE OF DENTAL CERAMIC AND RELATED METHODS

The invention relates to a solution to be selectively applied to individual parts of the surface of dental ceramic(s) and a process for using the solution in the dental field. More specifically the invention relates to a solution comprising a) a solvent, b) an effect agent, and c) a complexing agent. The invention also relates to a kit comprising the solution and to a method of using the solution for selectively treating of parts of the surface dental ceramic(s). The invention also relates to a application instrument suitable for applying the solution. 2. The solution according to claim 1 , wherein the complexing agent is used in an at least stoichiometric ratio with respect to the metal ions present in the effect agent.3. The solution according to claim 1 , wherein the complexing agent is selected from the group consisting of acetylacetonate claim 1 , crown ethers claim 1 , cryptands claim 1 , ethylenediaminetriacetate and its salts claim 1 , ethylenediaminetetraacetate (EDTA) and its salts claim 1 , nitrilotriacetate (NTA) and its salts claim 1 , citric acid and its salts claim 1 , triethylentetramine claim 1 , porphin claim 1 , poly acrylate claim 1 , poly asparagate claim 1 , acidic peptides claim 1 , phthalocyanin claim 1 , salicylate claim 1 , glycinate claim 1 , lactate claim 1 , propylendiamine claim 1 , ascorbate claim 1 , oxalic acid and its salts claim 1 , and mixtures thereof.4. The solution according to claim 1 , wherein the effect agent comprises metal ions selected from rare earth elements claim 1 , transition metals claim 1 , metals of the main groups and mixtures thereof.5. The solution according to claim 1 , wherein the effect agent is a salt comprising metal cations and anions claim 1 , wherein the anions are selected from the group consisting of OAc claim 1 , NO claim 1 , NO claim 1 , CO claim 1 , HCO claim 1 , ONC claim 1 , SCN claim 1 , SO claim 1 , SO claim 1 , halogen anions and mixtures thereof.6. The solution according to claim 1 , wherein ...

Verwendung von Zirkonoxidkeramiken mit Sinterzusatz zur Herstellung von Zahnersatz

The invention relates to blanks comprising a ceramic based on zirconium oxide and having an additive ranging from 0.1 up to 0.50 wt. % of at least one of the oxides of the elements aluminum, gallium, germanium and indium. The invention also relates to the use of said blanks.

METHOD AND SYSTEM FOR MAKING A DENTAL RESTORATION

A method and system for making a dental restoration are provided. The method comprises the step of providing a computer model of a three-dimensional reference surface that is based for example on a tooth structure of a tooth to be restored in a patient's dentition. The method further comprises the steps of visualizing the three-dimensional reference surface, providing a user operable virtual material deposition tool, and using the virtual material deposition tool to deposit a plurality of differently colored layers on the reference surface. The system provides functionality to perform the method of the invention. The invention preferably helps maximizing optical and geometrical quality in a dental restoration. 1. A method of making a dental restoration , the method comprising the steps of: ["a tooth structure of a tooth to be restored in a patient's dentition, and", 'a dental restoration for the tooth,, 'providing a computer model of a three-dimensional reference surface that is based on a shape of at least one ofvisualizing the three-dimensional reference surface;providing a user operable virtual material deposition tool;using the virtual material deposition tool to deposit a plurality of computer simulated layers relative to the reference surface;assigning at least two of the plurality of computer simulated layers different tooth colors;assigning at least one of the plurality of layers with a virtual material thickness;assigning at least one of the plurality of layers with a virtual dimension lateral to the thicknessdetermining a position relative to the reference surface or relative to a deposited layer;positioning the virtual material deposition tool toward the determined position; andactivating the virtual material deposition tool for depositing one of the plurality of layers at the determined position.2. The method of claim 1 , further comprising the steps of:optionally moving the activated virtual material deposition tool and thereby enhancing a layer ...

KIT OF PARTS AND PROCESS FOR FAST FIRING A POROUS ZIRCONIA ARTICLE IN COMBINATION WITH A SURFACE TREATING AGENT CONTAINING A GLASS POWDER

The invention relates to a process of producing a dental zirconia restoration, the dental zirconia restoration having an outer and an inner surface, the process comprising the step of firing a porous dental zirconia restoration and a glass until the porous dental zirconia restoration is sintered, the glass being located during the firing step on at least a portion of the outer surface of the porous dental zirconia restoration, wherein the zirconia material of the porous dental zirconia restoration and the glass are selected such that during the firing step the glass infiltrates the pores of the porous dental zirconia restoration to an extent of not more than 5 μm in depth. The invention also relates to a sintered dental zirconia restoration obtainable by such a process and a kit of parts comprising a porous dental zirconia mill blank and a surface treating agent containing a glass for use in such a process. 1. A process of producing a dental zirconia restoration ,the dental zirconia restoration having an outer and an inner surface, firing a porous dental zirconia restoration and a glass until the porous dental zirconia restoration is sintered,', 'the glass being located during the firing step on at least a portion of the outer surface of the porous dental zirconia restoration,, 'the process comprising the step ofwherein the zirconia material of the porous dental zirconia restoration and the glass are selected such that during the firing step the glass infiltrates the pores of the porous dental zirconia restoration to an extent of not more than 5 μm in depth.2. The process of producing a dental zirconia restoration according to claim 1 , the glass having a viscosity of at least 10Pa*s at the temperature at which the pores of the porous dental zirconia restoration close.3. The process of producing a dental zirconia restoration according to claim 1 , the glass and the zirconia material of the porous dental zirconia restoration being characterized as follows:{'sup': '4 ...

Verfahren zur Herstellung von Zahnersatz

The invention relates to a method for producing dentures, comprising the following steps: a) providing a blank, b) machining the blank by milling, and c) dense-sintering the blank at a temperature ranging from 1200 to 1650 DEG C. The blank is further characterized by comprising a presintered material and by having a resistance to fracture of from 31 to 50 MPa.

Einfärbung von keramischem Zahnersatz mittels ionischer oder komplexhaltiger Lösungen

Verfahren zum Einfärben von keramischem Zahnersatz im porösen oder saugfähigen Zustand mit Metallionen-Lösungen oder Metallkomplex-Lösungen, wobei Dentalkeramiken im vorgesinterten Zustand eingefärbt werden und die Konzentration der Lösungen 0,001 bis 15 Gew.-% beträgt.

Zirconia-based material doped with yttrium and lanthanum

Sintered bodies containing zirconia-based ceramic materials and partially sintered bodies that are intermediates in the preparation of the sintered bodies are described. The zirconia-based ceramic material is doped with lanthanum and yttrium. The grain size of the zirconia-based ceramic material can be controlled by the addition of lanthanum. The crystalline phase of the zirconia-based ceramic material can be influenced by the addition of yttrium.

DENTAL ARTICLES AND METHODS OF USING SAME

Dental articles and methods of using same. The dental article () includes a shell defining a volume, the shell () comprising a circumferential base () and an incisal/occlusal region () distal from the circumferential base. The dental article () further includes a hardenable dental composition () located within the volume, and an isolation film () located at the circumferential base of the shell. 1. A dental article comprising:a shell defining a volume, the shell comprising a circumferential base and an incisal/occlusal region distal from the circumferential base;a hardenable dental composition located within the volume, wherein the hardenable dental composition exhibits a yield stress from about 50 Pa to about 4,000 Pa at 37° C.; andan isolation film located at the circumferential base of the shell.2. The dental article of claim 1 , wherein the shell is in a shape of a crown claim 1 , a bridge claim 1 , a veneer claim 1 , a tooth facsimile claim 1 , a crown or restoration claim 1 , or an implant healing cap.3. The dental article of claim 1 , wherein the shell has a thickness of no greater than about 1 mm.4. The dental article of claim 1 , wherein the shell is not substantially distorted by a seating force from about 2 N to about 20 N.5. The dental article of claim 1 , wherein the circumferential base includes at least one flange extending in the facial/buccal direction claim 1 , in the lingual direction claim 1 , or in both the facial/buccal and lingual directions.6. The dental article of claim 1 , wherein the isolation film is radially stretchable by at least 100 percent without causing a perforation in the isolation film.7. The dental article of claim 1 , wherein the hardenable dental composition is in contact with the isolation film.8. The dental article of claim 1 , wherein the hardenable dental composition does not flow outside the shell during storage at room temperature.9. The dental article of claim 1 , wherein the dental article is adapted to receive a ...

Verfahren zur Herstellung von Zahnersatz, nach dem Verfahren herstellbares Zahnersatzteil sowie vorgesinterter Rohling

Verfahren zur Herstellung von Zahnersatz, umfassend die Schritte: a) Bereitstellung eines Rohlings, b) Bearbeiten des Rohlings durch fräsende Verfahren, c) Dichtsintern des durch fräsende Verfahren bearbeiteten Rohlings in einem Temperaturbereich von 1200 bis 1650°C, wobei der Rohling ein vorgesintertes keramisches Material umfasst und eine Rohbruchfestigkeit von 31 bis 50 MPa aufweist.

Verfahren zur Herstellung von Zahnersatz

CERAMIC DENTAL RESTORATIONS MADE BY ADDITIVE MANUFACTURING

An additively manufactured dental crown with a wall having a bottom edge and an occlusal portion joined with the wall opposite the bottom edge. The wall and occlusal portion form an interior surface and an opposing exterior surface. By using additive manufacturing and materials for such, the dental crown can have thin walls with a thickness of less than 300 microns at the thinnest portion of it and can include fine printed features such as identifiers, internal ribs, slots, porous meshes, and retention elements. 1. A method for making a dental crown , comprising steps of: a wall having a bottom edge; and', 'an occlusal portion joined with the wall opposite the bottom edge, the wall and the occlusal portion forming an interior surface and an opposing exterior surface,', 'wherein a thinnest portion of the wall has a thickness of less than 300 microns,', 'wherein the wall and the occlusal portion both comprise an additively manufacturable material,', 'wherein the wall includes a retention feature on the interior surface, and the retention feature comprises a continuous circumferential rib feature receding from the interior surface of the wall; and, 'receiving a design for a dental crown, comprisingmaking the dental crown using additive manufacturing, comprising additively manufacturing the wall, the occlusal portion, and the retention feature.2. The method of claim 1 , further comprising sintering the dental crown after making the dental crown using the additive manufacturing.3. The method of claim 1 , wherein the making step comprises making the dental crown using a 3D printer.4. The method of claim 1 , wherein the receiving step includes receiving the design wherein the wall includes notches extending fully through the wall at the bottom edge.5. The method of claim 1 , wherein the wall and the occlusal portion comprise zirconia.6. The method of claim 1 , wherein the receiving step includes receiving the design wherein the rib feature has a width along the interior ...

Silicon carbide component mfr. with improved strength - by sintering a spray-dried material in which resin particles of controlled size are the carbon source

Mfr. involves sintering green bodies comprising a mixt. of granules or a slip system with SiC particles and resin particles which provide C. The size of the resin particles is determined by the addn. of a pH controller and water to a soln. of the phenol resin in acetone or ethanol. Ammonia or triethylamine is pref. used as the pH controlling additive. The mixed granulated material is prepd. by spray-drying and contains SiC particles of mean grain size 0.1-2 microns. Boron of mean grain size 0.1-2 microns and resin particles of mean grain size less than 0.3 microns. An aq. soln. of polyvinyl alcohol in water is added to the initial resin soln. A non-hardening component is used as the phenol resin. ADVANTAGE - The strength of the SiC components is improved due to the inclusions of foreign materials, the formation of carbon aggregates being prevented and improved distribution of the resin particles and the ceramic particles in the mixed granulated feed or in the slip.

Verarbeitung von Gestaltdaten einer Dentalprothese

Die Erfindung betrifft ein Verfahren zur Verarbeitung von Daten über die dreidimensionale Gestalt einer dentalen Prothese, die zwei Prothesenabschnitte und einen mit diesen verbundenen und im Vergleich zu diesen weniger stabilen Verbindungsabschnitt aufweist, welches Verfahren die Schritte aufweist, dass: DOLLAR A - für den Verbindungsabschnitt ein Stabilitätsparameter und ein Stabilitätskriterium bestimmt werden; DOLLAR A - für den Stabilitätsparameter aus den Daten der Ist-Wert berechnet wird; DOLLAR A - für den Verbindungsabschnitt geprüft wird, ob der Ist-Wert das Stabilitätskriterium erfüllt, und, falls nein, ein Warnsignal erzeugt wird. DOLLAR A Es kann vorgesehen sein, dass das Stabilitätskriterium abhängt von: DOLLAR A - der Konfiguration der Prothese und/oder DOLLAR A - der Position der Prothese im Mund und/oder DOLLAR A - dem Material und/oder dem Querschnittsprofil des Verbindungsabschnittes und/oder DOLLAR A - der Art der an den Verbindungsabschnitt angrenzenden Prothesenabschnitte ...

Method of producing a dental restoration, dental restoration and use thereof

The invention relates to a method of producing a dental restoration ( 40 ), the method comprising the steps of providing a metallic frame ( 21 ) having an inner and an outer surface, applying one or more opaque layer(s) ( 23 ) or composition on the outer surface of the metallic frame, providing a facing precursor ( 31 ) having a volume A, mating the facing precursor on the outer surface of the metallic frame coated with the opaque layer using a mating composition to obtain a dental restoration intermediate, firing the dental restoration intermediate to a temperature where the facing precursor sinters to obtain a sintered facing having the volume B, and optionally applying a stain and/or glacing layer on the outer surface of the sintered facing. The invention also relates to a dental restoration obtainable by such a process.

SYSTEMS AND METHODS FOR MAKING LAYERED DENTAL APPLIANCES FROM THE OUTSIDE IN

A system and method for making a layered dental appliance. The system can include a first portion comprising a negative of a first layer of a layered dental appliance, and a second portion comprising a positive shape of a second layer of the layered dental appliance. The method can include providing a mold comprising a negative of an outer shape of a layered dental appliance, and positioning a slurry in the mold, forming a first layer of the layered dental appliance. The method can further include providing a solid structure comprising a positive shape of a second layer of the layered dental appliance, and pressing the solid structure into the slurry in the mold. 1. A method for making a layered dental appliance , the method comprising:providing a mold comprising a negative of an outer shape of a layered dental appliance;positioning a slurry in the mold, forming a first layer of the layered dental appliance;providing a solid structure comprising a positive shape of a second layer of the layered dental appliance, wherein the solid structure includes a stamp;pressing the solid structure into the slurry in the mold; andremoving the stamp from the slurry to form a cavity comprising a negative of the second layer in the slurry.24-. (canceled)5. The method of claim 1 , further comprising using the cavity as a mold for a second layer of the dental appliance.6. The method of claim 1 , wherein the slurry is a first slurry claim 1 , and further comprising positioning a second slurry in the cavity to form a second layer of the layered dental appliance.7. The method of claim 6 , further comprising pressing a dental core into the second slurry claim 6 , such that the core forms at least a portion of a third layer of the layered dental appliance.8. The method of claim 6 , further comprising:providing a second solid structure comprising a positive shape of a third layer of the layered dental appliance; andpressing the second solid structure into the second slurry.9. The method of ...

Method for making a dental blank, a press and a system for making dental blanks

The invention relates to a method of making a dental blank which combines uniaxial pressing isostatic pressing techniques. The invention also includes a press for performing the method and a system comprising a uniaxial and a isostatic press. The invention may help in efficient manufacturing of dental blanks at minimized costs and maximized quality.

Device and process for dimensionally stable sintering of ceramic pre-shaped articles

The present invention relates to a device and process for dimensionally stable sintering of ceramic pre-shaped dental articles, the device comprising a suspension system having a base structure with at least one suspension point at a height suitable for suspending an article to be sintered; and a suspension element moveably connected to said suspension point for supporting said article to be sintered, wherein said suspension element itself forms a swing on which said article to be sintered is arrangeable.

Process for the dimensionally-true sintering of ceramics

A process for the dimensionally-true sintering of ceramic pre-shaped items, in which the firing material is resting during sintering on supporting devices, not coated with metal, which independently adapt to the shrinkage dimensions which occur during the firing process or allow a contact-free support of the pre-shaped items.

PRODUCTION OF POROUS FORM BODY

PURPOSE: To improve strength and porosity by laminating grains obtd. by spray drying a solvent contg. SiCV powder contg. free carbon and Al and/or B and a binder on a negative mold and subjecting the grains to drying and sintering. CONSTITUTION: The binder (e.g. PVA) is added to the suspension obtd. by suspending the SiCV powder contg. 1 to 5% free carbon and the Al and/or B and having a specific surface area of 10 to 50m2/g in the solvent (e.g. water). This suspension is sprayed to form the granular drop having the corresponding grain size larger than the size of the SiCV powder and the grains of a spherical shape are obtd. by drying the granular drops. Next, the grains are laminated on the negative mold of the formed body arranged in the stream of the grains by adhering the grains to each other or to the negative mold while maintaining the spherical shape. The formed body is released from the negative mold after drying and is sintered. COPYRIGHT: (C)1990,JPO ...

Blank comprised of a zirconium oxide ceramic with an oxide additive and the use thereof

The invention relates to blanks comprising zirconium oxide-based ceramic with an addition of 0.1 to 0.50 wt.-% of at least one of the oxides of the elements aluminium, gallium, germanium, indium and their use.

Method and system for making a dental restoration

A method and system for making a dental restoration are provided. The method comprises the step of providing a computer model of a three-dimensional reference surface that is based for example on a tooth structure of a tooth to be restored in a patient's dentition. The method further comprises the steps of visualizing the three-dimensional reference surface, providing a user operable virtual material deposition tool, and using the virtual material deposition tool to deposit a plurality of differently colored layers on the reference surface. The system provides functionality to perform the method of the invention. The invention preferably helps maximizing optical and geometrical quality in a dental restoration.

Dental ceramic article, process of production and use thereof

The present disclosure relates to a dental ceramic article comprising ceramic components, the ceramic components having ZrO2 and Al2O3 and at least one component comprising Mn, Er or mixtures thereof, Al2O3 being present in an amount below about 0.15 wt.-% with respect to the weight of the ceramic article. The present disclosure relates also to kit of parts comprising a ceramic article and a coloring solution and processes for producing a dental ceramic article.

Dental articles and methods of using same

A dental article includes a shell defining a volume, the shell including a circumferential base and an incisal/occlusal region distal from the circumferential base. A hardenable dental composition is located within the volume of the shell, and an isolation film is located at the circumferential base of the shell.

SYSTEMS AND METHODS FOR MAKING LAYERED DENTAL APPLIANCES

A system and method for making a layered dental appliance. The system can include a first mold comprising a negative of a first layer of a layered dental appliance, a second mold comprising a negative of a second layer, and a dental core dimensioned to be at least partially received in the first mold and the second mold. The method can include positioning a first slurry in the first mold, and pressing the dental core into the first slurry to form a first article comprising the dental core and a first layer formed from the first slurry. The method can further include removing the first article from the first mold, positioning a second slurry in the second mold, and pressing the first article into the second slurry to form a second article comprising the dental core, the first layer, and a second layer formed from the second slurry.

Multi sectional dental zirconia milling block, process of production and use thereof

The invention also relates to a process of production of the porous dental milling block and its use for producing a dental article.

Coloring ceramics by way of ionic or complex-containing solutions

The invention relates to the coloring of ceramics by means of ionic or complex-containing solutions. Solutions preferred for this contain defined concentrations of at least one of the salts or complexes of the rare earth elements or the elements of the subgroups. The invention also relates to a kit, which comprises at least one stock bottle with such a coloring solution, a receptacle for the coloring as well as optionally a screen.

Composition for attaching a dental facing on a dental support structure, process and use thereof

The present invention relates to a composition for attaching a dental facing on a dental support structure comprising water, a glass and/or glass ceramic material, a rheological modifier with a molecular weight above about 500,000. The invention also relates to a process comprising the steps: providing a dental facing precursor and a dental support structure, both having an upper and a lower surface, attaching the dental facing precursor with its lower surface to the upper surface of the dental support structure, comprising the step of placing a mating composition between the lower surface of the dental facing precursor and the upper surface of the dental support structure and to the use of the inventive composition for producing dental restorations.

Aerogels, calcined and crystalline articles and methods of making the same

Aerogel, calcined articles, and crystalline articles comprising ZrO 2 . Exemplary uses of the crystalline metal oxide articles include dental articles (e.g., restoratives, replacements, inlays, onlays, veneers, full and partial crowns, bridges, implants, implant abutments, copings, anterior fillings, posterior fillings, and cavity liner, and bridge frameworks) and orthodontic appliances (e.g., brackets, buccal tubes, cleats, and buttons).

Colouring solution for dental ceramic articles and related methods

The invention relates to a colouring solution for colouring a dental ceramic articles, the solution comprising: a solvent and a colouring agent, comprising rare earth element metals or ions being present in the solution in an amount of at least about 0.05 mol/l solvent and transition metals or ions being present in the solution in an amount of about 0.00001 to about 0.05 mol/l solvent. The invention also relates to a process for colouring dental ceramic articles, dental ceramic articles treated either with the colouring solution or obtainable by a process comprising the step of firing the dental ceramic articles.

ZIRCONIA-BASED MATERIAL DOPED WITH YTTRIUM AND LANTHANUM

Sintered bodies containing zirconia-based ceramic materials and partially sintered bodies that are intermediates in the preparation of the sintered bodies are described. The zirconia-based ceramic material is doped with lanthanum and yttrium. The grain size of the zirconia-based ceramic material can be controlled by the addition of lanthanum. The crystalline phase of the zirconia-based ceramic material can be influenced by the addition of yttrium. 2. (canceled)3. (canceled)4. The sintered body of claim 1 , wherein the sintered body has a density that is at least 99.9 percent of a theoretical density.5. The sintered body of claim 1 , wherein the average grain size is less than or equal to 100 nanometers.6. The sintered body of claim 1 , wherein at least 70 percent of the zirconia-based ceramic material has a cubic/tetragonal crystalline structure.7. The sintered body of claim 1 , wherein at least 80 percent of the zirconia-based ceramic material has a cubic/tetragonal crystalline structure.8. The sintered body of claim 1 , wherein the sintered body has an average pore size no greater than 100 nanometers.9. The sintered body of claim 1 , wherein the sintered body has an average pore size no greater than 50 nanometers.10. The sintered body of claim 1 , wherein the zirconia-based ceramic material comprises 94.7 to 97.1 mole percent zirconium oxide claim 1 , 1.9 to 2.3 mole percent yttrium oxide claim 1 , and 1.0 to 3.0 mole percent lanthanum oxide.12. The method of claim 11 , wherein forming the zirconia-based green body comprises osmotic casting.13. The method of claim 11 , the method further comprisingpreparing a partially sintered body from the green body, wherein the partially sintered body comprises 25 to 75 volume percent inorganic oxide and 25 to 75 volume percent voids; andsintering comprises heating the partially sintered body to form the sintered body comprising greater than 75 volume percent inorganic oxide and less than 25 volume percent voids.14. The method ...

Colouring solution for selectively treating the surface of dental ceramic and related methods

The invention relates to a solution to be selectively applied to individual parts of the surface of dental ceramic(s) and a process for using the solution in the dental field. More specifically the invention relates to a solution comprising a) a solvent, b) an effect agent, and c) a complexing agent. The invention also relates to a kit comprising the solution and to a method of using the solution for selectively treating of parts of the surface dental ceramic(s). The invention also relates to a application instrument suitable for applying the solution.

Aerogels, calcined and crystalline articles and methods of making the same

Aerogel, calcined articles, and crystalline articles comprising ZrO2. Exemplary uses of the crystalline metal oxide articles include dental articles (e.g., restoratives, replacements, inlays, onlays, veneers, full and partial crowns, bridges, implants, implant abutments, copings, anterior fillings, posterior fillings, and cavity liner, and bridge frameworks) and orthodontic appliances (e.g., brackets, buccal tubes, cleats, and buttons).

Methods for making layered dental appliances from the outside in

A system and method for making a layered dental appliance. The system can include a first portion comprising a negative of a first layer of a layered dental appliance, and a second portion comprising a positive shape of a second layer of the layered dental appliance. The method can include providing a mold comprising a negative of an outer shape of a layered dental appliance, and positioning a slurry in the mold, forming a first layer of the layered dental appliance. The method can further include providing a solid structure comprising a positive shape of a second layer of the layered dental appliance, and pressing the solid structure into the slurry in the mold.

Dental blank comprising a pre-sintered porous zirconia material, process of its production and dental article formed from said dental blank

The invention relates to a dental mill blank comprising a pre-sintered porous zirconia material, the porous pre-sintered zirconia material showing a N2 adsorption of isotherm type IV according to IUPAC classification, the porous pre-sintered zirconia material having a Vickers hardness from about 25 to about 150, the dental mill blank comprising means for reversible attaching it to a machining device. The invention also relates to a process of producing a zirconia dental article comprising the steps of providing a dental mill blank comprising a porous pre-sintered zirconia material, placing the dental mill blank in a machining device, machining the porous zirconia material and to a dental article obtained by such a process.

TRANSLUCENCY ENHANCING SOLUTION FOR ZIRCONIA CERAMICS

The invention relates to kit of parts comprising a solution, a porous zirconia article, optionally application equipment, the solution comprising cation(s) of non-colouring agent(s) selected from ions of Y, Gd, La, Yb, Tm, Mg, Ca and mixtures thereof, solvent(s) for the ion(s), optionally complexing agent(s), optionally thickening agent(s), optionally organic marker substance(s), optionally additive(s), the porous zirconia article showing a N2 adsorption and/or desorption of isotherm type IV according to IUPAC classification. The invention also relates to a method for enhancing the translucency of a zirconia article comprising the steps of providing a porous zirconia article and a solution, applying the solution to at least a part of the outer surface of the porous zirconia article, optionally drying the porous zirconia article of the preceding step, sintering the porous zirconia article to obtain a zirconia ceramic article.

Translucency enhancing solution for zirconia ceramics

The invention relates to kit of parts comprising a solution, a porous zirconia article, optionally application equipment, the solution comprising cation(s) of non-colouring agent(s) selected from ions of Y, Gd, La, Yb, Tm, Mg, Ca and mixtures thereof, solvent(s) for the ion(s), optionally complexing agent(s), optionally thickening agent(s), optionally organic marker substance(s), optionally additive(s), the porous zirconia article showing a N2 adsorption and/or desorption of isotherm type IV according to IUPAC classification. The invention also relates to a method for enhancing the translucency of a zirconia article comprising the steps of providing a porous zirconia article and a solution, applying the solution to at least a part of the outer surface of the porous zirconia article, optionally drying the porous zirconia article of the preceding step, sintering the porous zirconia article to obtain a zirconia ceramic article.

COMPOSITION FOR ATTACHING A DENTAL FACING ON A DENTAL SUPPORT STRUCTURE, PROCESS AND USE THEREOF

The present invention relates to a composition for attaching a dental facing on a dental support structure comprising water, a glass and/or glass ceramic material, a rheological modifier with a molecular weight above about 500,000. The invention also relates to a process comprising the steps: providing a dental facing precursor and a dental support structure, both having an upper and a lower surface, attaching the dental facing precursor with its lower surface to the upper surface of the dental support structure, comprising the step of placing a mating composition between the lower surface of the dental facing precursor and the upper surface of the dental support structure and to the use of the inventive composition for producing dental restorations. 1. A composition to be used for attaching a dental facing on a dental support structure comprisinga. water,b. a glass and/or glass ceramic material,c. a rheological modifier with a molecular weight above about 500,000,wherein the glass and/or glass ceramic material is not able to undergo a cement reaction with a cross-linkable polyacid.2. The composition according to claim 1 , the composition being characterized by one or more of the following features:{'sup': '−1', 'Viscosity of composition not containing a glass and/or glass ceramic material: being in the range of about 10 to about 1,000 mPas, measured at a temperature of 23° C. with a shear rate s d(gamma)/dt of 50 s,'}can be combusted without leaving organic residues, if heated up to a temperature of about 750° C. for about 1 min at a pressure of 1013 mbar,content of organic components: being below about 7 wt.-%, wt.-% with respect to the weight of the whole composition.3. The composition according to claim 1 , comprising in addition one or more of the following components:polyethylene glycol with a molecular weight below about 10,000 andthickening agent selected from starch, methyl cellulose, ethyl cellulose, hydroxyl propyl cellulose, carboxy methyl cellulose, ...

Translucency enhancing solution for zirconia ceramics

The invention relates to kit of parts comprising a solution, a porous zirconia article, optionally application equipment, the solution comprising cation(s) of non-coloring agent(s) selected from ions of Y, Gd, La, Yb, Tm, Mg, Ca and mixtures thereof, solvent(s) for the ion(s), optionally complexing agent(s), optionally thickening agent(s), optionally organic marker substance(s), optionally additive(s), the porous zirconia article showing a N2 adsorption and/or desorption of isotherm type IV according to IUPAC classification. The invention also relates to a method for enhancing the translucency of a zirconia article comprising the steps of providing a porous zirconia article and a solution, applying the solution to at least a part of the outer surface of the porous zirconia article, optionally drying the porous zirconia article of the preceding step, sintering the porous zirconia article to obtain a zirconia ceramic article.

A METHOD AND SYSTEM FOR MAKING A DENTAL RESTORATION

A method and system for making a dental restoration are provided. The method comprises the step of providing a computer model of a three-dimensional reference surface that is based for example on a tooth structure of a tooth to be restored in a patient's dentition. The method further comprises the steps of visualizing the three-dimensional reference surface, providing a user operable virtual material deposition tool, and using the virtual material deposition tool to deposit a plurality of differently colored layers on the reference surface. The system provides functionality to perform the method of the invention. The invention preferably helps maximizing optical and geometrical quality in a dental restoration.

METHOD OF MAKING A FACING FOR A DENTAL RESTORATION, FACING FOR A DENTAL RESTORATION, AND METHOD OF MAKING A DENTAL RESTORATION

A method of making a facing for a dental restoration. The method comprises the step of providing a facing precursor from which the facing is obtainable, and wherein the facing precursor is comprised of an open-celled material. The method provides for efficient manufacturing of dental restorations with optimized characteristics.

Device and process for dimensionally stable sintering of ceramic pre-shaped articles

PROCESS FOR PRODUCING A DENTAL ZIRCONIA ARTICLE WITH A FAST SINTERING PROCESS

The invention relates to a process of sintering a dental zirconia restoration, the process comprising a first step of heat-treating a porous dental zirconia article with a heating rate of at least 3 K/sec until a temperature level of 75 to 90% of the final sintering temperature is achieved to obtain a partially sintered dental zirconia article, the porous dental zirconia article having a BET surface of 5 to 12 m/g and being composed of a 4 mol % yttria stabilized zirconia material and having an alumina content of utmost 0.15 wt. %. 1. A process of sintering a dental zirconia restoration , the process comprising a firing step with a first segment of heat-treating a porous dental zirconia article with a heating rate of at least 3 K/sec until a temperature level of 75 to 90% of the final sintering temperature of 1 ,500 to 1 ,650° C. is achieved to obtain a partially sintered dental zirconia article , the porous dental zirconia article having a BET surface of 5 to 12 m/g , being composed of a zirconia material containing about 4 mol % yttria and having an alumina content of utmost 0.15 wt. %.2. The process according to claim 1 , the firing step comprising a second segment of heat-treating following the first segment without interruption with a heating rate being different claim 1 , preferably lower than the heating rate of the first step claim 1 , the second step being applied until a temperature of at least 1 claim 1 ,500° C. is reached.3. The process according to claim 2 , the firing step comprising a third segment of heat-treating following the second heat-treating segment without interruption characterized by a dwell time of utmost 8 min.4. The process according to claim 3 , the firing step comprising a cooling-down segment following the third segment of heat-treating without interruption claim 3 , the cooling-down segment being characterized by the following features alone or in combinationcooling-down rate: 3K/sec or more until a temperature of 1,000° C. is ...

Zirconia body and methods

A translucent zirconia sintered body, a dental article comprising a shaped, translucent zirconia body, a zirconia green body, and methods of making a translucent zirconia sintered body, methods of making a dental article comprising a shaped, translucent zirconia body, and methods of making a zirconia green body are described.

Processing of shape data of a dental prosthesis

The invention relates to the processing of data regarding the three dimensional shape of a dental prosthesis, having two prosthesis sections and a connector section, wherein the connector section is connected to the two prosthesis sections and is less stable than the two prosthesis sections. The method includes the steps of (a) determining a stability parameter and a stability criterion for the connector section, (b) calculating the actual value for the stability parameter from the data, (c) checking the connector section to determine whether the actual value fulfills the stability criterion, and if not, generating a warning signal is to the user.

Systems and methods for making layered dental appliances

A system and method for making a layered dental appliance. The system can include a first mold comprising a negative of a first layer of a layered dental appliance, a second mold comprising a negative of a second layer, and a dental core dimensioned to be at least partially received in the first mold and the second mold. The method can include positioning a first slurry in the first mold, and pressing the dental core into the first slurry to form a first article comprising the dental core and a first layer formed from the first slurry. The method can further include removing the first article from the first mold, positioning a second slurry in the second mold, and pressing the first article into the second slurry to form a second article comprising the dental core, the first layer, and a second layer formed from the second slurry.

UNIFORMLY COLOURED CERAMIC FRAMEWORK AND COLOURING SOLUTION

The present invention relates to a colouring solution for ceramic framework, the ceramic framework coloured with the solution as well as a process to obtain a uniformly coloured ceramic framework. The solution comprises a solvent, a metal salt and polyethylene glycol having a Mn in the range of 1.000 to 200.000.

ZIRCONIA-BASED MATERIAL DOPED WITH YTTRIUM AND LANTHANUM

Sintered bodies containing zirconia-based ceramic materials and partially sintered bodies that are intermediates in the preparation of the sintered bodies are described. The zirconia-based ceramic material is doped with lanthanum and yttrium. The grain size of the zirconia-based ceramic material can be controlled by the addition of lanthanum. The crystalline phase of the zirconia-based ceramic material can be influenced by the addition of yttrium.

PROCESSING OF SHAPE DATA OF A DENTAL PROSTHESIS

The invention relates to the processing of data regarding the three dimensional shape of a dental prosthesis, having two prosthesis sections and a connector section, wherein the connector section is connected to the two prosthesis sections and is less stable than the two prosthesis sections. The method includes the steps of (a) determining a stability parameter and a stability criterion for the connector section, (b) calculating the actual value for the stability parameter from the data, (c) checking the connector section to determine whether the actual value fulfills the stability criterion, and if not, generating a warning signal is to the user.

DENTAL CERAMIC ARTICLE, PROCESS OF PRODUCTION AND USE THEREOF

The present disclosure relates to a dental ceramic article comprising ceramic components, the ceramic components having ZrO2 and Al2O3 and at least one component comprising Mn, Er or mixtures thereof, Al2O3 being present in an amount below about 0.15 wt.-% with respect to the weight of the ceramic article. The present disclosure relates also to kit of parts comprising a ceramic article and a colouring solution and processes for producing a dental ceramic article. 1. A dental ceramic article comprising ceramic components , the ceramic components comprising ZrO2 and Al2O3 and colouring components comprising ions or oxides of Mn , Er , or mixtures thereof , Al2O3 being present in an amount from about 0.0001 to about 0.14 wt.-% with respect to the weight of the ceramic components.3. The dental ceramic article according to comprising a stabilizer selected from oxides of Y claim 1 , Mg claim 1 , Ca claim 1 , Ce claim 1 , La and mixtures thereof.4. The dental ceramic article according to having the shape of a dental support structure claim 1 , a dental crown claim 1 , a dental bridge claim 1 , a dental facing claim 1 , an inlay claim 1 , an onlay claim 1 , a mill blank claim 1 , an implant or of an abutment.5. The dental ceramic article according to being contained in a frame or comprising a holding device.6. The dental ceramic article according to being in a pre-sintered stage and being characterized by at least one of the following features:raw breaking resistance: from about 5 to about 55 MPa,{'sup': '3', 'density: from about 2.4 to about 3.7 g/cm,'}porosity: from about 40 to about 60 vol.-%.7. The dental ceramic article according to being in a sintered stage and being characterized by at least one of the following features:breaking resistance: at least about 400 MPa,{'sup': '3', 'density: from about 5.9 to about 6.1 g/cm,'}fluorescence emission in the region of the visible light.8. A kit of parts comprising at least one dental ceramic article and at least one colouring ...

CERAMIC DENTAL RESTORATIONS MADE BY ADDITIVE MANUFACTURING

An additively manufactured dental crown with a wall having a bottom edge and an occlusal portion joined with the wall opposite the bottom edge. The wall and occlusal portion form an interior surface and an opposing exterior surface. By using additive manufacturing and materials for such, the dental crown can have thin walls with a thickness of less than 300 microns at the thinnest portion of it and can include fine printed features such as identifiers, internal ribs, slots, porous meshes, and retention elements. 1. An additively manufactured dental crown , comprising:a wall having a bottom edge; andan occlusal portion joined with the wall opposite the bottom edge, the wall and the occlusal portion forming an interior surface and an opposing exterior surface,wherein a thinnest portion of the wall has a thickness of less than 300 microns,wherein the wall and the occlusal portion both comprise an additively manufacturable material.2. The dental crown of claim 1 , wherein the wall includes ribs on the interior surface.3. The dental crown of claim 1 , wherein the wall includes notches at the bottom edge.4. The dental crown of claim 1 , wherein the wall includes retention features on the interior surface.5. The dental crown of claim 1 , wherein the wall includes a slot extending fully through the wall and joined with the bottom edge.6. The dental crown of claim 1 , wherein the wall includes a first slot extending fully through the wall and joined with the bottom edge claim 1 , and a second slot extending fully through the wall and joined with the first slot opposite the bottom edge.7. The dental crown of claim 1 , wherein the wall includes cutting rib features indenting into the interior surface adjacent the bottom edge.8. The dental crown of claim 1 , wherein the wall includes a porous mesh.9. The dental crown of claim 1 , wherein the wall and the occlusal portion comprise concentric stacked shells.10. The dental crown of claim 1 , wherein the wall and the occlusal ...

METHOD AND SYSTEM FOR MAKING A DENTAL RESTORATION

A method and system for making a dental restoration are provided. The method comprises the step of providing a computer model of a three-dimensional reference surface that is based for example on a tooth structure of a tooth to be restored in a patient's dentition. The method further comprises the steps of visualizing the three-dimensional reference surface, providing a user operable virtual material deposition tool, and using the virtual material deposition tool to deposit a plurality of differently colored layers on the reference surface. The system provides functionality to perform the method of the invention. The invention preferably helps maximizing optical and geometrical quality in a dental restoration. 1. A method of making a dental restoration , the method comprising the steps of: ["a tooth structure of a tooth to be restored in a patient's dentition, and", 'a dental restoration for the tooth,, 'providing a computer model of a three-dimensional reference surface that is based on a shape of at least one ofvisualizing the three-dimensional reference surface;providing a user operable virtual material deposition tool;using the virtual material deposition tool to deposit a plurality of computer simulated layers relative to the reference surface;assigning at least two of the plurality of computer simulated layers different tooth colors;assigning at least one of the plurality of layers with a virtual material thickness;assigning at least one of the plurality of layers with a virtual dimension lateral to the thicknessdetermining a position relative to the reference surface or relative to a deposited layer;positioning the virtual material deposition tool toward the determined position;activating the virtual material deposition tool for depositing one of the plurality of layers at the determined position;visualizing one or both neighboring teeth with a simulation of color shading and translucency gradient during the activating step;providing a computer model of the ...

SOL CONTAINING NANO ZIRCONIA PARTICLES FOR USE IN ADDITIVE MANUFACTURING PROCESSES FOR THE PRODUCTION OF 3-DIMENSIONAL ARTICLES

The invention relates to the use of a printing sol as construction material in an additive manufacturing process for producing a 3-dim article, the printing sol comprising solvent(s), nano-sized crystalline zirconia particles in an amount from 2 to 25 vol.-% with respect to the volume of the sol, the average primary particle size of the nano-sized crystalline zirconia particles being in a range up to 50 nm, a first monomer being a polymerizable surface modification agent represented by formula A-B, with A being capable of attaching to the surface of the nano-sized crystalline zirconia particles and B being a radiation curable group, optionally a second monomer, the second monomer comprising at least one radiation curable moiety but no acidic or silane group(s), photo initiator(s). The invention also relates to a ceramic article obtainable according to such a process. 1. Use of a printing sol as construction material in an additive manufacturing process for producing a [3-dim] three-dimensional article , the printing sol comprising:solvent(s);nano-sized crystalline zirconia particles in an amount from 2 to 25 vol.-% with respect to the volume of the sol, the average primary particle size of the nano-sized crystalline zirconia particles being in a range up to 50 nm;a first monomer being a polymerizable surface modification agent represented by formula A-B, with A being capable of attaching to the surface of the nano-sized crystalline zirconia particles and B being a radiation curable group;optionally a second monomer, the second monomer comprising at least one radiation curable moiety but no acidic or silane group(s); andphotoinitiator(s).2. The use of claim 1 , the printing sol being characterized by at least one or all of the following features:being translucent in a wave length range from 420 to 600 nm for a path length of 10 mm;showing a transmission of at least 5% at 420 nm determined for a path length of 10 mm;the sol having a viscosity of less than 500 mPa*s at ...

Translucency enhancing solution for zirconia ceramics

The invention relates to kit of parts comprising a solution, a porous zirconia article, optionally application equipment, the solution comprising cation(s) of non-colouring agent(s) selected from ions of Y, Gd, La, Yb, Tm, Mg, Ca and mixtures thereof, solvent(s) for the ion(s), optionally complexing agent(s), optionally thickening agent(s), optionally organic marker substance(s), optionally additive(s), the porous zirconia article showing a N2 adsorption and/or desorption of isotherm type IV according to IUPAC classification. The invention also relates to a method for enhancing the translucency of a zirconia article comprising the steps of providing a porous zirconia article and a solution, applying the solution to at least a part of the outer surface of the porous zirconia article, optionally drying the porous zirconia article of the preceding step, sintering the porous zirconia article to obtain a zirconia ceramic article.

Additive manufacturing process for producing ceramic articles using a sol containing nano-sized particles

The present invention relates to a process for producing a ceramic article, the process comprising the steps of providing a printing sol, the printing sol comprising solvent, nano-sized particles, radiation curable monomer(s) and photoinitiator, the printing sol having a viscosity of less than 500 mPa*s at 23° C., processing the printing sol as construction material in an additive manufacturing process to obtain a 3-dim article being in a gel state, the 3-dim article having a Volume A, transferring the 3-dim article being in a gel state to a 3-dim article being in an aerogel state, heat treating the 3-dim article to obtain a sintered 3-dim ceramic article, the ceramic article having a Volume F, Volume A of the 3-dim article in a gel state being more than 500% of Volume F of the ceramic article in its sintered state. The invention also relates to a ceramic article obtainable according to such a process. The ceramic article can have the shape of a dental or orthodontic article.

FLUORESCENT GLAZING COMPOSITION FOR A DENTAL ZIRCONIA ARTICLE, PROCESS OF SINTERING AND KIT OF PARTS

The invention relates to a glazing composition for a porous dental zirconia article, the glazing composition comprising liquid, glass particles, fluorescing component(s) comprising europium, optionally hydrophilic silica nano-particles, and optionally hydrophobic silica nano-particles, wherein the fluorescing component(s) can be contained in the glass particles or as separate component. The invention also relates to a process for sintering a porous dental zirconia article with a glazing composition on its surface. 1. A glazing composition for a porous dental zirconia article , the glazing composition comprisingliquid,glass particles,fluorescing component(s) comprising europium,wherein the fluorescing component(s) can be contained in the glass particles or as separate component,optionally hydrophilic silica nano-particles, andoptionally hydrophobic silica nano-particles.2. The glazing composition according to claim 1 , the ratio of glass particles to europium being in a range of 1 claim 1 ,000:1 to 20:1 with respect to weight.3. The glazing composition according to claim 1 , the liquid being a polar liquid claim 1 , preferably selected from water claim 1 , alcohols claim 1 , polyols and mixtures thereof.6. The glazing composition according to claim 1 , the fluorescing component(s) being characterized by the following features alone or in combination:being present in an amount of 0.1 to 5 wt. % with respect to the weight of the whole composition calculated with respect to the amount of europium;{'sub': '50', 'particle size (D): 1 to 40 μm;'}being selected from oxides, hydroxides or carbonates of Eu.9. The glazing composition according to claim 1 , being characterized by the following features alone or in combination:viscosity: 10 to 2,500 mPa*s at 23° C.;pH value: 6 to 9.11. A process of producing a dental zirconia article claim 1 , the process comprising the steps ofproviding a porous dental zirconia article,{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'applying ...

AEROGELS, CALCINED AND CRYSTALLINE ARTICLES AND METHODS OF MAKING THE SAME

Aerogel, calcined articles, and crystalline articles comprising ZrO. Exemplary uses of the crystalline metal oxide articles include dental articles (e.g., restoratives, replacements, inlays, onlays, veneers, full and partial crowns, bridges, implants, implant abutments, copings, anterior fillings, posterior fillings, and cavity liner, and bridge frameworks) and orthodontic appliances (e.g., brackets, buccal tubes, cleats, and buttons). 1. A crack-free , calcined metal oxide article having x , y , and z dimensions of at least 5 mm , a density in a range from 30 to 95 percent of theoretical density , and an average connected pore size in a range from 10 nm to 100 nm , wherein at least 70 mole percent of the metal oxide is crystalline ZrO , and wherein the crystalline ZrOhas an average grain size less than 100 nm.2. The crack-free claim 1 , calcined metal oxide of claim 1 , wherein the crack-free claim 1 , calcined metal oxide article has x claim 1 , y claim 1 , and z dimensions of at least 10 mm.3. The crack-free claim 1 , calcined metal oxide of claim 1 , wherein at least 75 mole percent of the crystalline metal oxide present in the crack-free claim 1 , calcined metal oxide article is crystalline ZrO.4. The crack-free claim 1 , calcined metal oxide of claim 1 , wherein the crystalline metal oxide comprises in a range from 1 to 15 (in some embodiments claim 1 , 1 to 9 claim 1 , 1 to 5 claim 1 , 6 to 9 3.5 to 4.5 claim 1 , or even 7 to 8) mole percent of the crystalline metal oxide is YO.5. The crack-free claim 1 , calcined metal oxide of claim 1 , wherein the crystalline metal oxide further comprises at least one of YOor LaO.6. The crack-free claim 1 , calcined metal oxide of claim 1 , wherein the crystalline metal oxide further comprises at least one of CeO claim 1 , PrO claim 1 , NdO claim 1 , PmO claim 1 , SmO claim 1 , EuO claim 1 , GdO claim 1 , TbO claim 1 , DyO claim 1 , HoO claim 1 , ErO claim 1 , TmO claim 1 , YbO claim 1 , FeO claim 1 , MnO claim 1 , CoO ...

RESTORATION, RESTORATION COMPONENTS, AND METHODS OF MAKING A DENTAL RESTORATION

A method is provided for making a dental restoration at a certain tooth color shade. The method comprises joining a veneer precursor, a framework and a compensation material to form the dental restoration. The tooth color shade is selected from among a continuous range of tooth color shades, but individual components of the dental restoration may be selected from discrete color shades. Further, a dental restoration, a kit and a use of the kit are provided in accordance with the invention. 1. A method of making a dental restoration , the dental restoration having a tooth color shade D selected from among a continuous range of tooth color shades; the method comprising the steps of:providing a framework having a pre-determined framework color shade A;providing a veneer precursor having a pre-determined veneer color shade C selected from among a set of discrete color shades;providing a compensation material having a compensation material color shade B based in part on the pre-determined framework color shade A and pre-determined veneer color shade C, wherein the compensation material color shade B is selected from among a continuous range of color shades; andjoining the veneer precursor, the framework and the compensation material to form the dental restoration,wherein the compensation material color shade B is selected such that together with the veneer color shade C and the framework color shade A, the dental restoration approximates the desired tooth color shade D.2. The method of claim 1 , wherein the veneer precursor is substantially comprised of pre-sintered glass-ceramic particles.3. The method of claim 1 , wherein the veneer precursor is substantially comprised of sintered glass-ceramic.4. The method of claim 1 , wherein the step of joining the veneer precursor claim 1 , the framework and the compensation material comprises the steps of:applying the compensation material to at least one of the framework and the veneer precursor to form a dental restoration ...

AEROGELS, CALCINED AND CRYSTALLINE ARTICLES AND METHODS OF MAKING THE SAME

Aerogel, calcined articles, and crystalline articles comprising ZrO. Exemplary uses of the crystalline metal oxide articles include dental articles (e.g., restoratives, replacements, inlays, onlays, veneers, full and partial crowns, bridges, implants, implant abutments, copings, anterior fillings, posterior fillings, and cavity liner, and bridge frameworks) and orthodontic appliances (e.g., brackets, buccal tubes, cleats, and buttons). 1. An monolithic aerogel comprising organic material and crystalline metal oxide particles , wherein the crystalline metal oxide particles are in a range from 3 to 20 volume percent , based on the total volume of the monolithic aerogel , wherein at least 70 mole percent of the crystalline metal oxide is ZrO.2. The monolithic aerogel of claim 1 , wherein the crystalline metal oxide particles are in a range from 1 to 15 mole percent of the crystalline metal oxide is YO.3. The monolithic aerogel of claim 1 , wherein the crystalline metal oxide particles comprise a first plurality of particles claim 1 , and a second claim 1 , different plurality of particles.4. A method of making a crack-free claim 1 , calcined metal oxide article having x claim 1 , y claim 1 , and z dimensions of at least 5 mm claim 1 , a density in as range from 30 to 95 percent of theoretical density claim 1 , and an average connected pore size in a range from 10 nm to 100 nm claim 1 , wherein at least 70 mole percent of the metal oxide is crystalline ZrO claim 1 , and wherein the crystalline ZrOhas an average grain size less than 100 nm claim 1 , the method comprising heating the monolithic aerogel of for a time and at at least one temperature sufficient to provide the crack-free claim 1 , calcined metal oxide article.5. The method of further comprising chemically treating the calcined metal oxide article to remove volatile ions.6. A method of making the aerogel comprising organic material and crystalline metal oxide particles claim 4 , wherein the crystalline metal ...

MULTI SECTIONAL DENTAL ZIRCONIA MILLING BLOCK, PROCESS OF PRODUCTION AND USE THEREOF

The invention relates to a porous dental milling block comprising at least two geometrically defined Material Sections A and B, Material Section A comprising a tetragonal zirconia crystal phase in an amount A-T in % and a cubic zirconia crystal phase in an amount A-C in %, Material Section B comprising cubic zirconia crystal phase in an amount B-T in % and cubic zirconia crystal phase in an amount B-C in %, wherein (amount of tetragonal phase A-T in %)/(amount of cubic phase content A-C in %)>1 and (amount of tetragonal phase content B-T in %)/(amount of cubic phase content B-C in %)<1. The invention also relates to a process of production of the porous dental milling block and its use for producing a dental article. 1. A process of producing a porous dental milling block comprising the steps of:a. casting a sol (I) containing zirconia crystallites into a mould (I), the zirconia crystallites having a crystal phase composition (1),b. transferring the sol (I) to a gel body (I),c. optionally transferring the gel body (I) to a mould (II),d. casting a sol (II) containing zirconia crystallites so that it gets into contact with gel body (I), the zirconia crystallites having a crystal phase composition (2),e. transferring sol (II) into a gel body (II),f. optionally repeating steps (d) and (e) thereby casting additional sol(s) into either mould (II) or another mould to which the gel bodies of either step (d) or obtained after conducting step (e) have been transferred,g. removing solvent contained in the gel bodies to obtain an aerogel,{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'h. heat-treating the aerogel to obtain a porous dental milling block according to .'}2. A process of producing a porous dental milling block comprising the steps of: Sol S1-T comprising tetragonal zirconia crystallites,', 'Sol S2-C comprising cubic zirconia crystallites,, 'providing a Mixture A of a Sol S1-T and a Sol S2-C,'}the amount of tetragonal zirconia crystallites in Sol S1-T (in wt.-% ...

DENTAL BLANK COMPRISING A PRE-SINTERED POROUS ZIRCONIA MATERIAL, PROCESS OF ITS PRODUCTION AND DENTAL ARTICLE FORMED FROM SAID DENTAL BLANK

The invention relates to a dental mill blank comprising a pre-sintered porous zirconia material, the porous pre-sintered zirconia material showing a N2 adsorption of isotherm type IV according to IUPAC classification, the porous pre-sintered zirconia material having a Vickers hardness from about 25 to about 150, the dental mill blank comprising means for reversible attaching it to a machining device. The invention also relates to a process of producing a zirconia dental article comprising the steps of providing a dental mill blank comprising a porous pre-sintered zirconia material, placing the dental mill blank in a machining device, machining the porous zirconia material and to a dental article obtained by such a process. 1. A dental mill blank comprising a pre-sintered porous zirconia material ,the porous pre-sintered zirconia material showing a N2 adsorption and/or desorption of isotherm type IV according to IUPAC classification,the porous pre-sintered zirconia material having a Vickers hardness from about 25 to about 150,the dental mill blank comprising means for reversible attaching it to a machining device.2. The dental mill blank of claim 1 , the porous pre-sintered zirconia material being characterized by at least one of the following features:showing a nitrogen adsorption and desorption isotherm with hysteresis loop;showing a hysteresis loop of type H1 according to IUPAC classification;{'sub': '0', 'showing a N2 adsorption and desorption isotherm with a hysteresis loop in a p/prange of 0.70 to 0.95;'}average connected pore diameter: from about 10 to about 100 nm;average grain size: less than about 100 nm;{'sup': '2', 'BET surface: from about 10 to about 200 m/g;'}Biaxial flexural strength: from about 10 to about 40;x, y, z dimension: at least about 5 mm;Vickers hardness: from about 25 to about 150;density: about 30 to about 95% of theoretical density;having an isotropic shrinkage behaviour.3. The dental mill blank according to claim 2 , the porous pre- ...

GLAZING COMPOSITION FOR A DENTAL ZIRCONIA ARTICLE, PROCESS OF SINTERING AND KIT OF PARTS

The invention relates to a glazing composition suitable for glazing the surface a dental zirconia article. The glazing composition comprises a liquid, glass particles, and hydrophilic silica nano-particles. The invention also relates to a process for sintering a porous dental zirconia article with a glazing composition on its surface. 1. A glazing composition for a porous dental zirconia article , the glazing composition comprisingliquid,glass particles, andhydrophilic silica nano-particles.2. The glazing composition according to claim 1 , the ratio of hydrophilic silica nano-particles to glass particles being in a range of 1:40 to 1:5 with respect to weight.3. The glazing composition according to claim 1 , the liquid being a polar liquid selected from water claim 1 , alcohols claim 1 , polyols and mixtures thereof.8. The glazing composition according to claim 1 , being characterized by the following features alone or in combination:viscosity: 10 to 3,000 mPa*s at 23° C.;pH value: 6 to 9.9. The glazing composition according to claim 1 , comprisingliquid selected from water, alcohol, polyols and mixtures thereof in an amount of 60 to 95 wt. %, [{'sub': '50', 'the glass particles having a particle size (D) of 1 to 40 μm,'}, {'sup': 4', '7, 'the glass of the glass particles having a viscosity of 10to 10Pa*s at 1,300° C.,'}], 'glass particles in an amount of 4 to 40 wt. %,'}hydrophilic silica nano-particles in an amount of 0.1 to 5 wt. %,wt. % with respect to the weight of the whole glazing composition.10. A process of producing a dental zirconia article claim 1 , the process comprising the steps ofproviding a porous dental zirconia article,{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'applying the glazing composition of to at least a part of the surface of the porous dental zirconia article,'}sintering the porous dental zirconia article with the glazing composition on its surface to final density.11. The process according to claim 10 , the porous dental zirconia ...

MULTI SECTIONAL DENTAL ZIRCONIA MILLING BLOCK, PROCESS OF PRODUCTION AND USE THEREOF

The invention relates to a porous dental milling block comprising at least two geometrically defined Material Sections A and B, Material Section A comprising a tetragonal zirconia crystal phase in an amount A-T in % and a cubic zirconia crystal phase in an amount A-C in %, Material Section B comprising cubic zirconia crystal phase in an amount B-T in % and cubic zirconia crystal phase in an amount B-C in %, wherein (amount of tetragonal phase A-T in %)/(amount of cubic phase content A-C in %)>1 and (amount of tetragonal phase content B-T in %)/(amount of cubic phase content B-C in %)<1. The invention also relates to a process of production of the porous dental milling block and its use for producing a dental article. 1. A porous dental milling block comprising at least two geometrically defined Material Sections A and B ,Material Section A comprising a tetragonal zirconia crystal phase in an amount A-T in wt.-% and a cubic zirconia crystal phase in an amount A-C in wt.-%,Material Section B comprising a cubic zirconia crystal phase in an amount B-T in wt.-% and a cubic zirconia crystal phase in an amount B-C in wt.-%, {'br': None, '(amount of tetragonal phase A-T in wt.-%)/(amount of cubic phase content A-C in wt.-%)>1'}, 'wherein'} {'br': None, '(amount of tetragonal phase content B-T in wt.-%)/(amount of cubic phase content B-C in wt.-%)<1'}, 'and'}the material of Material Sections A and B showing a N2 adsorption and/or desorption behaviour of isotherm IV according to IUPAC classification,2. The porous dental milling block of claim 1 , the material of Material Sections A and B being characterized by the following property:the sintering temperature being in a range of 1200 to 1400° C.3. The porous dental milling block of being characterized by at least one of the following features:the ratio of the tetragonal phase content A-T in % to the cubic phase content A-C in % in Section A being in a range from about 1.2 to about 50,the ratio of the tetragonal phase content A ...

A microwave furnace and a method of sintering

A microwave furnace has a furnace chamber formed between a chamber housing and a sintering platform for an object to be sintered. A microwave source is arranged for emitting microwaves into the furnace chamber. The microwave furnace further has a susceptor that comprises a material which over a temperature range of the material of at least 23 C to 700 C couples into microwaves. The susceptor and the furnace chamber are movable relative to each other between a first position, in which the susceptor is positioned relative to the furnace chamber, and a second position in which the susceptor is positioned further retracted from the furnace chamber relative to the first position. The invention helps providing a zirconia material with a relative homogeneous material structure.

Coloring ceramics by way of ionic or complex-containing solutions

The invention relates to the coloration of ceramics by way of ionic or complex-containing solutions. The solutions preferred for this purpose contain defined concentrations of at least one of the salts or complexes of the rare earth elements or of the elements of the subgroups. The invention further relates to a kit that comprises at least one reservoir bottle containing such a coloration solution, a container for the coloration and optionally a sieve.

Dental articles and methods of using same

Dental articles and methods of using same. The dental article (510) includes a shell defining a volume, the shell (512) comprising a circumferential base (514) and an incisal/occlusal region (516) distal from the circumferential base. The dental article (510) further includes a hardenable dental composition (518) located within the volume, and an isolation film (520) located at the circumferential base of the shell.

Blank comprised of a zirconium oxide ceramic with an oxidic additive and the use thereof

The invention relates to blanks comprising a ceramic based on zirconium oxide and having an additive ranging from 0.1 up to 0.50 wt. % of at least one of the oxides of the elements aluminum, gallium, germanium and indium. The invention also relates to the use of said blanks.

Dental blank comprising a pre-sintered porous zirconia material, process of its production and dental article formed from said dental blank

The invention relates to a dental mill blank comprising a pre-sintered porous zirconia material, the porous pre-sintered zirconia material showing a N2 adsorption of isotherm type IV according to IUPAC classification, the porous pre-sintered zirconia material having a Vickers hardness from about 25 to about 150, the dental mill blank comprising means for reversible attaching it to a machining device. The invention also relates to a process of producing a zirconia dental article comprising the steps of providing a dental mill blank comprising a porous pre-sintered zirconia material, placing the dental mill blank in a machining device, machining the porous zirconia material and to a dental article obtained by such a process.

Uniformly coloured ceramic framework and ceramic colouring solution

The present invention relates to a colouring solution for ceramic framework, the ceramic framework coloured with the solution as well as a process to obtain a uniformly coloured ceramic framework. The solution comprises a solvent, a metal salt and polyethylene glycol having a Mn in the range of 1.000 to 200.000.

Method for producing a dental prosthesis

The invention relates to a process for the preparation of dentures, comprising the steps: a) preparation of a blank, b) processing of the blank by milling methods, c) dense sintering of the blank in a temperature range from 1200 to 1650°C, the blank comprising a pre-sintered material and having a raw breaking resistance of 15 to 30 MPa.

Method for dimensionally sintering ceramics

The invention relates to a process for the dimensionally--true sintering of ceramic pre-shape items, in which the firing material is resting during sintering on supporting devices, not coated with metal, which independently adapt to the shrinkage dimensions which occur during the firing process or allow a contact-free support of the pre-shaped items.

Systems and methods for making layered dental appliances

A system and method for making a layered dental appliance. The system can include a first mold comprising a negative of a first layer of a layered dental appliance, a second mold comprising a negative of a second layer, and a dental core dimensioned to be at least partially received in the first mold and the second mold. The method can include positioning a first slurry in the first mold, and pressing the dental core into the first slurry to form a first article comprising the dental core and a first layer formed from the first slurry. The method can further include removing the first article from the first mold, positioning a second slurry in the second mold, and pressing the first article into the second slurry to form a second article comprising the dental core, the first layer, and a second layer formed from the second slurry.

Method of producing a dental restoration, dental restoration and use thereof

The invention relates to a method of producing a dental restoration (40), the method comprising the steps of providing a metallic frame (21) having an inner and an outer surface, applying one or more opaque layer(s) (23) or composition on the outer surface of the metallic frame, providing a facing precursor (31) having a volume A, mating the facing precursor on the outer surface of the metallic frame coated with the opaque layer using a mating composition to obtain a dental restoration intermediate, firing the dental restoration intermediate to a temperature where the facing precursor sinters to obtain a sintered facing having the volume B, and optionally applying a stain and/or glacing layer on the outer surface of the sintered facing. The invention also relates to a dental restoration obtainable by such a process.

Method of making a facing for a dental restoration, facing for a dental restoration, and method of making a dental restoration

A method of making a facing for a dental restoration. The method comprises the step of providing a facing precursor from which the facing is obtainable, and wherein the facing precursor is comprised of an open-celled material. The method provides for efficient manufacturing of dental restorations with optimized characteristics.

Coloring ceramics by way of ionic or complex-containing solutions

The invention relates to the coloration of ceramics by way of ionic or complex-containing solutions. The solutions preferred for this purpose contain defined concentrations of at least one of the salts or complexes of the rare earth elements or of the elements of the subgroups. The invention further relates to a kit that comprises at least one reservoir bottle containing such a coloration solution, a container for the coloration and optionally a sieve.

Process for producing a dental zirconia article with a fast sintering process

The invention relates to a process of sintering a dental zirconia restoration, the process comprising a first step of heat-treating a porous dental zirconia article with a heating rate of at least 3 K/sec until a temperature level of 75 to 90 % of the final sintering temperature is achieved to obtain a partially sintered dental zirconia article, the porous dental zirconia article having a BET surface of 5 to 12 m 2 /g and being composed of a 4 mol% yttria stabilized zirconia material and having an alumina content of utmost 0.15 wt.%.

Method of making a facing for a dental restoration and facing for a dental restoration

Method for producing a dental prosthesis

The invention relates to a method for producing a dental prosthesis comprising the following steps: a) preparing a blank; b) machining the blank using milling methods; c) dense sintering the blank at a temperature ranging from 1200 to 1650 °C, whereby the blank comprises a presintered material and has a raw resistance to breaking ranging from 15 to 30 Mpa.

Restoration, restoration components, and methods of making a dental restoration

A method is provided for making a dental restoration at a certain tooth color shade. The method comprises joining a veneer precursor, a framework and a compensation material to form the dental restoration. The tooth color shade is selected from among a continuous range of tooth color shades, but individual components of the dental restoration may be selected from discrete color shades. Further, a dental restoration, a kit and a use of the kit are provided in accordance with the invention.

Zirconia body and methods

A translucent zirconia sintered body, a dental article comprising a shaped, translucent zirconia body, a zirconia green body, and methods of making a translucent zirconia sintered body, methods of making a dental article comprising a shaped, translucent zirconia body, and methods of making a zirconia green body are described.

Method for dimensionally sintering ceramics

The invention relates to a process for the dimensionally--true sintering of ceramic pre-shape items, in which the firing material is resting during sintering on supporting devices, not coated with metal, which independently adapt to the shrinkage dimensions which occur during the firing process or allow a contact-free support of the pre-shaped items.

Restoration, restoration components, and methods of making a dental restoration

A method is provided for making a dental restoration at a certain tooth color shade. The method comprises joining a veneer precursor, a framework and a compensation material to form the dental restoration. The tooth color shade is selected from among a continuous range of tooth color shades, but individual components of the dental restoration may be selected from discrete color shades. Further, a dental restoration, a kit and a use of the kit are provided in accordance with the invention.

Systems and methods for making layered dental appliances from the outside in

A system and method for making a layered dental appliance. The system can include a first portion comprising a negative of a first layer of a layered dental appliance, and a second portion comprising a positive shape of a second layer of the layered dental appliance. The method can include providing a mold comprising a negative of an outer shape of a layered dental appliance, and positioning a slurry in the mold, forming a first layer of the layered dental appliance. The method can further include providing a solid structure comprising a positive shape of a second layer of the layered dental appliance, and pressing the solid structure into the slurry in the mold.

Uniformly coloured ceramic framework and ceramic colouring solution

The present invention relates to a colouring solution for ceramic framework, the ceramic framework coloured with the solution as well as a process to obtain a uniformly coloured ceramic framework. The solution comprises a solvent, a metal salt and polyethylene glycol having a Mn in the range of 1.000 to 200.000.

Glazing composition for a dental zirconia article, process of sintering and kit of parts

The invention relates to a glazing composition suitable for glazing the surface a dental zirconia article. The glazing composition comprises a liquid, glass particles, and hydrophilic silica nano-particles. The invention also relates to a process for sintering a porous dental zirconia article with a glazing composition on its surface.

Method of producing a dental restoration, dental restoration and use thereof

The invention relates to a method of producing a dental restoration (40), the method comprising the steps of providing a metallic frame (21) having an inner and an outer surface, applying one or more opaque layer(s) (23) or composition on the outer surface of the metallic frame, providing a facing precursor (31) having a volume A, mating the facing precursor on the outer surface of the metallic frame coated with the opaque layer using a mating composition to obtain a dental restoration intermediate, firing the dental restoration intermediate to a temperature where the facing precursor sinters to obtain a sintered facing having the volume B, and optionally applying a stain and/or glacing layer on the outer surface of the sintered facing. The invention also relates to a dental restoration obtainable by such a process.

Device and process for dimensionally stable sintering of ceramic pre-shaped articles

The present invention relates to a device and process for dimensionally stable sintering of ceramic pre-shaped dental articles, the device comprising a suspension system having a base structure with at least one suspension point at a height suitable for suspending an article to be sintered; and a suspension element moveably connected to said suspension point for supporting said article to be sintered, wherein said suspension element itself forms a swing on which said article to be sintered is arrangeable.

Additive manufacturing process for producing ceramic articles using a sol containing nano-sized particles

Device and process for dimensionally stable sintering of ceramic pre-shaped articles

Device and Process for dimensionally stable sintering of ceramic pre-shaped articles The present invention relates to a device and process for dimensionally stable sintering of ceramic pre-shaped dental articles, the device comprising a suspension system having a base structure with at least one suspension point at a height suitable for suspending an article to be sintered; and a suspension element moveably connected to said suspension point for supporting said article to be sintered, wherein said suspension element itself forms a swing on which said article to be sintered is arrangeable.

Coloring ceramics by way of ionic or complex-containing solutions

The invention relates to the colouring of ceramics by means of ionic or complex-containing solutions. Solutions preferred for this contain defined concentrations of at least one of the salts or complexes of the rare earth elements or the elements of the subgroups. The invention also relates to a kit, which comprises at least one stock bottle with such a colouring solution, a receptacle for the colouring as well as optionally a screen.

Procedimiento para la produccion de protesis dentales.

Procedimiento para la producción de prótesis dentales, que comprende las etapas de: a) proporcionar una pieza en bruto, b) tratar la pieza en bruto mediante procedimientos de fresado, c) sinterizar a alta densidad la pieza en bruto en un intervalo de temperatura de desde 1200 hasta 1650ºC, comprendiendo la pieza en bruto un material sinterizado previamente y presentando una resistencia a la rotura en bruto de desde 31 hasta 50 MPa.

Rohling aus zirkonoxidkeramik mit oxidischem zusatz und dessen verwendung

Verfahren zur herstellung von zahnersatz

ガラス粉末を含有する表面処理剤と組み合わせた多孔質ジルコニア物品を高速焼成するための部材のキット及び方法

【課題】歯科用ジルコニア修復物を提供する。【解決手段】焼結歯科用ジルコニア修復物であって、以下のセクション：ガラス層セクションであって、１０～２００μｍの層厚を有する、ガラス層セクションと、前記ガラス層セクションに隣接する中間層セクションであって、前記ガラス層セクションの前記ガラスを浸潤させたジルコニア材料セクションを含有し、且つ０．０１～５μｍの層厚を有する、中間層セクションと、前記中間層セクションに隣接するジルコニア材料セクションであって、ガラスを含有しない、ジルコニア材料セクションと、を有する、焼結歯科用ジルコニア修復物とする。【選択図】図１

Systems and methods for making layered dental appliances

A system and method for making a layered dental appliance. The system can include a mold comprising a negative of an outer shape of a layered dental appliance, and a dental core dimensioned to be at least partially received in the mold. The method can include positioning a first slurry in the mold, and pressing the dental core into the first slurry in the mold to form a first article comprising the dental core and a first layer formed from the first slurry. The method can further include removing the first article from the mold, and firing the first article. The method can further include positioning a second slurry in the mold, and pressing the first article into the second slurry in the mold to form a second article comprising the dental core, the first layer, and a second layer formed from the second slurry.

Verfahren zum dimensionstreuen sintern von keramik

Zusammensetzung zur befestigung einer zahnverblendung auf einer zahnstützstruktur, verfahren und verwendung davon

Vorrichtung und verfahren zum dimensionsstabilen sintern von vorgefomten keramischen artikeln

Gleichmässig gefärbte gerüstkeramik sowie färbelösung

composição para a fixação de um revestimento, kit para a fixação de um revestimento dental, processos, restauração dentaria e uso de uma composição

Verfahren zur herstellung eines poroesen formkoerpers.

Dental restorations made by additive manufacturing

A microwave furnace and a method of sintering

A microwave furnace has a furnace chamber formed between a chamber housing and a sintering platform for an object to be sintered. A microwave source is arranged for emitting microwaves into the furnace chamber. The microwave furnace further has a susceptor that comprises a material which over a temperature range of the material of at least 23C to 700C couples into microwaves. The susceptor and the furnace chamber are movable relative to each other between a first position, in which the susceptor is positioned relative to the furnace chamber, and a second position in which the susceptor is positioned further retracted from the furnace chamber relative to the first position. The invention helps providing a zirconia material with a relative homogeneous material structure.

Colouring solution for dental ceramic articles and related methods

The invention relates to a colouring solution for colouring a dental ceramic articles, the solution comprising: a solvent and a colouring agent, comprising rare earth element metals or ions being present in the solution in an amount of at least about 0.05 mol/l solvent and transition metals or ions being present in the solution in an amount of about 0.00001 to about 0.05 mol/l solvent. The invention also relates to a process for colouring dental ceramic articles, dental ceramic articles treated either with the colouring solution or obtainable by a process comprising the step of firing the dental ceramic articles.

Ceramic dental restorations made by additive manufacturing

An additively manufactured dental crown with a wall having a bottom edge and an occlusal portion joined with the wall opposite the bottom edge. The wall and occlusal portion form an interior surface and an opposing exterior surface. By using additive manufacturing and materials for such, the dental crown can have thin walls with a thickness of less than 300 microns at the thinnest portion of it and can include fine printed features such as identifiers, internal ribs, slots, porous meshes, and retention elements.

Colouring solution for dental ceramic articles and related methods

The invention relates to a colouring solution for colouring a dental ceramic articles, the solution comprising: a solvent and a colouring agent, comprising rare earth element metals or ions being present in the solution in an amount of at least about 0.05 mol/l solvent and transition metals or ions being present in the solution in an amount of about 0.00001 to about 0.05 mol/l solvent. The invention also relates to a process for colouring dental ceramic articles, dental ceramic articles treated either with the colouring solution or obtainable by a process comprising the step of firing the dental ceramic articles.

Composition for attaching a dental facing on a dental support structure, process and use thereof

The present invention relates to a composition for attaching a dental facing on a dental support structure comprising water, a glass and/or glass ceramic material, a rheological modifier with a molecular weight above about 500,000. The invention also relates to a process comprising the steps: providing a dental facing precursor and a dental support structure, both having an upper and a lower surface, attaching the dental facing precursor with its lower surface to the upper surface of the dental support structure, comprising the step of placing a mating composition between the lower surface of the dental facing precursor and the upper surface of the dental support structure and to the use of the inventive composition for producing dental restorations.

Färbungslösung für dentale keramikartikel und entsprechende verfahren

Verfahren zur herstellung von zahnersatz

Verfahren zur herstellung von zahnersatz

Additive manufacturing process for producing ceramic articles using a sol containing nano-sized particles

The present invention relates to a process for producing a ceramic article, the process comprising the steps of providing a printing sol, the printing sol comprising solvent, nano-sized particles, radiation curable monomer(s) and photoinitiator, the printing sol having a viscosity of less than 500 mPa*s at 23°C, processing the printing sol as construction material in an additive manufacturing process to obtain a 3-dim article being in a gel state, the 3-dim article having a Volume A, transferring the 3-dim article being in a gel state to a 3-dim article being in an aerogel state, heat treating the 3-dim article to obtain a sintered 3-dim ceramic article, the ceramic article having a Volume F, Volume A of the 3-dim article in a gel state being more than 500% of Volume F of the ceramic article in its sintered state. The invention also relates to a ceramic article obtainable according to such a process. The ceramic article can have the shape of a dental or orthodontic article.

Device and process for dimensionally stable sintering of ceramic pre-shaped articles

The present invention relates to a device and process for dimensionally stable sintering of ceramic pre-shaped dental articles, the device comprising a suspension system having a base structure with at least one suspension point at a height suitable for suspending an article to be sintered; and a suspension element moveably connected to said suspension point for supporting said article to be sintered, wherein said suspension element itself forms a swing on which said article to be sintered is arrangeable.

Device and process for dimensionally stable sintering of ceramic pre-shaped articles

Device and Process for dimensionally stable sintering of ceramic pre-shaped articles The present invention relates to a device and process for dimensionally stable sintering of ceramic pre-shaped dental articles, the device comprising a suspension system having a base structure with at least one suspension point at a height suitable for suspending an article to be sintered; and a suspension element moveably connected to said suspension point for supporting said article to be sintered, wherein said suspension element itself forms a swing on which said article to be sintered is arrangeable.

Processing of shape data of a dental prosthesis

Translucency enhancing solution for zirconia ceramics

The invention relates to kit of parts comprising a solution, a porous zirconia article, optionally application equipment, the solution comprising cation(s) of non-colouring agent(s) selected from ions of Y, Gd, La, Yb, Tm, Mg, Ca and mixtures thereof, solvent(s) for the ion(s), optionally complexing agent(s), optionally thickening agent(s), optionally organic marker substance(s), optionally additive(s), the porous zirconia article showing a N2 adsorption and/or desorption of isotherm type IV according to IUPAC classification. The invention also relates to a method for enhancing the translucency of a zirconia article comprising the steps of providing a porous zirconia article and a solution, applying the solution to at least a part of the outer surface of the porous zirconia article, optionally drying the porous zirconia article of the preceding step, sintering the porous zirconia article to obtain a zirconia ceramic article.

Processing of shape data of a dental prosthesis

The invention relates to the processing of data regarding the three dimensional shape of a dental prosthesis, which has two prosthesis sections and a connector section, said connector section being connected to the two prosthesis sections and less stable than the two prosthesis sections, comprising the steps that:—a stability parameter and a stability criterion are determined for the connector section;—for the stability parameter, the actual value is calculated from the data;—it is checked for the connector section as to whether the actual value fulfills the stability criterion, and if not, that a warning signal is generated, wherein the determination of the stability criterion is dependent on at least one of the following prosthesis attributes:—the configuration of the prosthesis;—the position of the prosthesis inside the mouth;—the material and/or the cross-sectional profile of the connector section;—the type of the prosthesis sections adjoining the connector section.

Processing of shape data of a dental prosthesis

The invention relates to the processing of data regarding the three dimensional shape of a dental prosthesis, which has two prosthesis sections and a connector section, said connector section being connected to the two prosthesis sections and less stable than the two prosthesis sections, comprising the steps that : - a stability parameter and a stability criterion are determined for the connector section ; - for the stability parameter, the actual value is calculated from the data ; - it is checked for the connector section as to whether the actual value fulfills the stability criterion, and if not, that a warning signal is generated, wherein the determination of the stability criterion is dependent on at least one of the following prosthesis attributes : - the configuration of the prosthesis; - the position of the prosthesis inside the mouth ; - the material and/or the cross-sectional profile of the connector section ; - the type of the prosthesis sections adjoining the connector section.

Processing of shape data of a dental prosthesis

The invention relates to the processing of data regarding the three dimensional shape of a dental prosthesis, having two prosthesis sections and a connector section, wherein the connector section is connected to the two prosthesis sections and is less stable than the two prosthesis sections. The method includes the steps of (a) determining a stability parameter and a stability criterion for the connector section, (b) calculating the actual value for the stability parameter from the data, (c) checking the connector section to determine whether the actual value fulfills the stability criterion, and if not, generating a warning signal is to the user.

Kit of parts and process for fast firing a porous zirconia article in combination with a surface treating agent containing a glass powder

The invention relates to a process of producing a dental zirconia restoration, the dental zirconia restoration having an outer and an inner surface, the process comprising the step of firing a porous dental zirconia restoration and a glass until the porous dental zirconia restoration is sintered, the glass being located during the firing step on at least a portion of the outer surface of the porous dental zirconia restoration, wherein the zirconia material of the porous dental zirconia restoration and the glass are selected such that during the firing step the glass infiltrates the pores of the porous dental zirconia restoration to an extent of not more than 5 μm in depth. The invention also relates to a sintered dental zirconia restoration obtainable by such a process and a kit of parts comprising a porous dental zirconia mill blank and a surface treating agent containing a glass for use in such a process.

Fluorescent glazing composition for a dental zirconia article, process of sintering and kit of parts

The invention relates to a glazing composition for a porous dental zirconia article, the glazing composition comprising liquid, glass particles, fluorescing component(s) comprising europium, optionally hydrophilic silica nano-particles, and optionally hydrophobic silica nano-particles, wherein the fluorescing component(s) can be contained in the glass particles or as separate component. The invention also relates to a process for sintering a porous dental zirconia article with a glazing composition on its surface.