Patent ID: 7025790

Claim:
An ankle joint prosthesis adapted to involve the patient's distal tibia and talus, said prosthesis comprising: a tibial component for lateral to medial implanting on a prepared portion of said distal tibia, said tibial component having a top and a bottom surface, said top surface having convex curvature in the anterior to posterior direction and configured so as to compliment and match with the curvature of said prepared portion of said distal tibia, said bottom surface being approximately flat, a talar component for lateral to medial implanting on a prepared portion of said talus, said talar component having a top and a bottom surface and a lateral edge, said top surface having convex curvature in the anterior to posterior direction, said bottom surface having concave curvature in the anterior to posterior direction and configured so as to compliment and match with the curvature of said prepared portion of said talus, and a mobile bearing component for lateral to medial implanting between said tibial and talar components, said bearing component having a top and a bottom surface, said top surface being approximately flat, said bottom surface having concave curvature in the anterior to posterior direction that is complementary to the curvature of said talar component's top surface.