Crystallization treatment method of plasma-sprayed hydroxyapatite coating

The invention belongs to the technical field of surgical implant coatings, and relates to a method for improving the content of a crystalline phase in a plasma-sprayed hydroxyapatite coating. The method comprises the following steps: placing a hydroxyapatite coating product in an evacuatable container, pumping out air in the container to form vacuum environment, introducing saturated water steam, heating the whole container to 500-900DEG C, and treating for 2-6h. A high temperature and the saturated water stem promote the conversion of an amorphous phase in the hydroxyapatite coating into the crystalline phase and also convert thermal decomposition products in the hydroxyapatite coating into the crystalline phase of the hydroxyapatite coating in order to greatly improve the content of the crystalline phase in the product coating. The method has the advantages of good coating treatment effect, stable process and suitableness for large scale production.

Artificial joint prosthesis with biologically activated surface

Artificial joint prosthesis with biologically activated surface

The invention belongs to the technical field of surgical implants and relates to an artificial joint prosthesis with biologically activated surface. The biological activation layer formed on the surface of the artificial joint prosthesis has good biocompatibility and bioactivity and forms natural chemical bonding with the bone tissues, thus improving the bond strength between the prosthesis and the bone tissues, ensuring the stress transfer to be more reasonable and reducing the negative effect of stress shielding. The biological activation layer on the surface of the artificial joint prosthesis is formed by chemical reaction and forms chemical bonding with the matrix, therefore, the problem that the biological activation layer on the surface sheds is avoided, thus ensuring the postoperative long-term effect of the prosthesis. The artificial joint prosthesis is biologically fixed; therefore, wear particles produced when bone cement is adopted for fixation are avoided, thus reducing the ...