Patent ID: 8192491

Claim:
A prosthetic device for placement between a tibial plateau and a femoral condyle, the prosthetic device comprising: a body portion comprising a semi-ellipsoidal outer portion and a central body portion, the outer portion having an increased thickness relative to the central body portion, wherein the semi-ellipsoidal outer portion surrounds a majority of the central body portion such that a first end of the semi-ellipsoidal outer portion is adjacent to an anterior portion of the prosthetic device, a second end of the semi-ellipsoidal outer portion is adjacent to a posterior portion of the prosthetic device, and a middle section of the semi-ellipsoidal outer portion extending between the first and second ends is adjacent a lateral portion of the prosthetic device such that a section of the central portion defines an outer boundary having a reduced thickness relative to the semi-ellipsoidal outer portion along a medial portion of the prosthetic device between the first and second ends, the outer boundary being substantially linear between the first and second ends, and wherein the central body portion has an upper surface configured for articulating engagement with the femoral condyle and a lower surface configured for engagement with the tibial plateau, the upper surface being at least partially concave and the lower surface being at least partially convex; a fixation member extending from and substantially perpendicular to the lower surface of the body portion, the fixation member configured to engage with a prepared opening in the tibial plateau to fixedly engage the prosthetic device to the tibial plateau; wherein the body portion and the fixation member comprise a monolithic structure formed of a resiliently flexible polymeric material.