Patent ID: 8652210

Claim:
A femoral component of a knee prosthesis, comprising: (a) an anterior portion, including an anterior medial side having a medial patellar facing surface and an anterior lateral side having a lateral patellar facing surface; (b) a distal portion, including a distal medial side and a distal lateral side; and (c) a posterior portion, including a posterior medial side and a posterior lateral side; wherein the femoral component defines a medial condylar surface and a lateral condylar surface; wherein the anterior lateral side projects further anteriorly than the anterior medial side; and when viewed in a top plan view and when the femoral component is oriented at full extension relative to the patella, the lateral patellar facing surface is abruptly shaped to contact a lateral side of the patella and define a buttress for cooperation with the lateral side of the patella and wherein the medial patellar facing surface is flat relative to the lateral patellar facing surface; and wherein, when viewed in the top plan view and when the femoral component is oriented at 30 degrees flexion relative to the patella, both the lateral patellar facing surface and the medial patellar facing surface are shaped for cooperation with the patella, wherein the medial patellar facing surface at the full extension orientation is flat relative to the medial patellar facing surface at the 30 degrees flexion orientation.