Patent ID: 11911279
Assignee: ZIMMER, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 7:
8. A system of posterior-stabilized knee prostheses for a knee arthroplasty, the system comprising:
a tibial bearing component having a tibial articular surface with a medial compartment and a lateral compartment, wherein the tibial bearing component has a spine extending proximally from the tibial articular surface and positioned between the medial and lateral compartments, and wherein the medial compartment has a medial dwell point;
a femoral prosthesis having a cam and medial and lateral condyles spaced to either side of the cam, wherein the medial condyle is configured for articulation with the medial compartment and lateral condyle is configured for articulation with the lateral compartment, and wherein femoral prosthesis is configured to articulate through a range of motion relative to the tibial bearing component, such range of motion includes a full extension that corresponds to zero degrees flexion of a knee joint and positive flexion that corresponds to greater than zero degrees flexion of the knee joint, and wherein an area of contact between the medial condyle and the medial compartment does not shift position during the range of motion between zero degrees flexion and substantially 100 degrees flexion and the area of contact includes the medial dwell point during the range of motion between zero degrees flexion and substantially 100 degrees flexion.