Patent ID: 8911502

Claim:
A knee joint prosthesis, comprising: a tibial component having an inferior surface and a superior surface that serves as a bearing surface for a femoral component, the superior surface having a generally concave medial compartment configured to receive and articulate with a medial femoral condyle, and a generally concave lateral compartment configured to receive and articulate with a lateral femoral condyle, the lateral compartment shape forming a curve in a transverse plane of the tibial component, with a concave side of the curve facing medially and having a length extending from an anterior end thereof to a posterior end thereof, wherein the lateral compartment has an anteroposterior profile that is characterized by a first, anterior arc that is concave, a second arc posterior to the first arc that is convex, and a third arc posterior to the second arc that is concave, and wherein an anteroposterior dimension of the second, convex arc of the lateral compartment increases in size from a medial portion of the lateral compartment to a lateral portion of the lateral compartment.