Cement-less hip socket prosthesis - has horizontal knife edges protruding from polar area and extending downwards

The internal hip joint socket prosthesis can be anchored without cement. It comprises an inner body and an external dish divided into a polygon by meridional cuts, its polar area being parallel to the equator. The polygon comprises two cones (10,16) of different angles to the axis (17). Horizontal knife edges (9) protrude from the polar area (3) at intervals round the periphery and are bent over to extend to the end of the cone (10) adjacent to this area. USE - Can be driven straight into the pelvis without turning, thus reducing injury to the bone and aiding growth of tissue against and round it.