Patent ID: 11883298
Assignee: DEPUY IRELAND UNLIMITED COMPANY
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 9:
10. An orthopaedic knee prosthesis comprising:
a femoral component having a lateral condyle and a medial condyle, wherein the medial condyle includes a femoral articular surface defined by a plurality of curved femoral surface sections that includes a first curved femoral surface section and a second curved femoral surface section posteriorly adjacent the first curved femoral surface section, wherein the first curved femoral surface section is defined by a continually decreasing radius of curvature and the second curved femoral surface section is defined by a constant radius of curvature greater than a posterior-most radii of curvature of the first curved femoral surface section; and
a tibial insert having a lateral articular surface configured to articulate with the lateral condyle of the femoral component and a medial articular surface configured to articulate with the medial condyle of the femoral component, wherein the medial articular surface is asymmetrically shaped relative to the lateral articular surface and includes a medial dwell point that defines a distal-most point on the medial articular surface,
wherein the medial condyle (i) contacts the medial dwell point at a first contact point on the first curved femoral surface section at a first degree of flexion, the first contact point being defined by the posterior-most radii of curvature of the first curved femoral surface section and (ii) contacts the medial dwell point at a second contact point on the second curved femoral surface section at a second degree of flexion greater than the first degree of flexion, the second contact point being defined by the constant radius of curvature of the second curved femoral surface section, and
wherein an inferior-superior distance between the medial dwell point and an origin of the constant radius of curvature of the second curved femoral surface section at the second degree of flexion is greater than an inferior-superior distance between the medial dwell point and an origin of the posterior-most radii of curvature of the first curved femoral surface section at the first degree of flexion.