Anterior stabilized PCL retaining total knee prosthesis

摘要

A knee prosthesis that includes a tibial component and femoral component. The tibial component includes an articular surface, a posterior portion and an anterior portion. The posterior portion includes a recess for receipt of a posterior cruciate ligament. The anterior portion includes a post extending therefrom. The post includes a posterior surface. The femoral component includes a condylar portion and an intercondylar portion. The intercondylar portion includes a posterior recess for receipt of the posterior cruciate ligament, a cam, and an engagement recess for receipt of the post. The cam includes a sliding surface and is disposed between the engagement recess and posterior recess. The sliding surface of the cam slides along the posterior surface of the post for restricting anterior subluxation of a femur bone when the articular surface and the condylar portion articulates through flexion of a knee joint.

主权项

1. A knee joint prosthesis, comprising:
a tibial component having concave articular surfaces and a post, first surface, and first recess each disposed between the concave articular surfaces, the first recess being located at a posterior aspect of the tibial component and being configured to receive a posterior cruciate ligament, the post extending from the first surface in a direction away from the first recess and having a second surface and a third surface disposed opposite the second surface, the first surface being adjacent to the second and third surfaces, the second and third surfaces each sloping away from the first recess toward an extent of the post; and a femoral component having convex articular surfaces and a cam, second recess, and engagement recess each disposed between the convex articular surfaces, the cam being disposed between the second recess and engagement recess and having a sliding surface; wherein the sliding surface slides along the first and second surfaces when the concave articular surfaces articulate with the convex articular surfaces.