Patent ID: 7261740

Claim:
A prosthetic for facilitating articulating contact of a tibia with a femur of a knee, said femur having a medial condyle and a lateral condyle, said knee prosthetic comprising: a tibial component defining a lateral concavity and a medial concavity; said lateral concavity having a first portion configured to interact with the lateral condyle of the femur during normal knee flexion and a second portion configured to interact with the lateral condyle of the femur during high knee flexion; said medial concavity having a first portion configured to interact with the medial condyle of the femur during normal knee flexion and a second portion configured to interact with the medial condyle of the femur during high knee flexion; wherein the lateral and medial concavities have different shapes and wherein the first and second portions are at least partially at separate locations within their respective concavities; and said medial concavity including a conforming boundary encompassing at least the first and second portions, a surface within the conforming boundary being generally flat, the conforming boundary having a progressively expanding medial-lateral width as it extends from an anterior end to a posterior end, and the conforming boundary having a generally triangular shape with an apex at the anterior end and a base at the posterior end.