Patent ID: 8075626

Claim:
An orthopaedic knee prosthesis comprising: a tibial bearing configured to be coupled to a tibial tray, the tibial bearing having a platform including a medial condylar bearing surface and a lateral condylar bearing surface and a spine extending upwardly from the platform and positioned between said medial and lateral bearing surfaces, the spine including an anterior surface, a posterior cam surface, a medial sidewall, and a lateral sidewall; and a femoral component configured to articulate with the tibial bearing, the femoral component having a pair of spaced-apart medial and lateral condyles and a cam box therebetween, the cam box defined by an inner anterior wall, a posterior cam, an inner medial sidewall, and an inner lateral sidewall, wherein (i) the medial and lateral sidewalls of the spine are tapered in the anterior-posterior direction when viewed in the transverse plane and (ii) the inner medial and lateral sidewalls of the cam box are tapered in the anterior-posterior direction when viewed in the transverse plane, wherein the posterior cam surface of the spine is convex in the transverse plane, and is concave in the sagittal plane, and wherein the platform has a centerline axis defined in the anterior-posterior direction when viewed in the transverse plane, and the spine has a longitudinal axis that is angled with respect to the centerline axis of the platform when viewed in the transverse plane.