A prosthetic joint includes: (a) a bone-implantable first member comprising a rigid material and including a body having an annular flange extending outward at a first end thereof, the first end of the body and the flange cooperatively defining a wear-resistant concave first contact surface having a...http://www.google.de/patents/US7905919?utm_source=gb-gplus-sharePatent US7905919 - Prosthetic joint
