Patent ID: 7615080

Claim:
A joint prosthesis comprising: a joint stem implantable into a bone and having a concavity therein; a conjoining member disposed in said concavity and free to swivel within said concavity in an unexpanded state but fixed to be stationary within said concavity in an expanded state; and a joint head having (i) a body defining an articulation surface, and (ii) an expander extending from said body and received by said conjoining member, wherein in an uncompacted state of said expander relative to said conjoining member said conjoining member is in the unexpanded state and said joint head is therefore adjustably positionable in any one of a plurality of medial-lateral and anterior-posterior orientations, and in a compacted state of said expander relative to said conjoining member said conjoining member is in the expanded state wherein said conjoining member and said joint head are fixed in angular orientation.