US 11,883,298 B2
Medial stabilized orthopaedic knee prosthesis
Mark A. Heldreth, Warsaw, IN (US); Travis D. Bennett, Huntington, IN (US); Amitkumar M. Mane, South Whitley, IN (US); Michael J. Rock, Leeds (GB); Thomas E. Wogoman, Warsaw, IN (US); and Stephen E. White, Fort Wayne, IN (US)
Assigned to DEPUY IRELAND UNLIMITED COMPANY, Ringaskiddy (IE)
Filed by DEPUY IRELAND UNLIMITED COMPANY, Ringaskiddy (IE)
Filed on Jul. 10, 2021, as Appl. No. 17/372,443.
Claims priority of provisional application 63/050,744, filed on Jul. 10, 2020.
Prior Publication US 2022/0008208 A1, Jan. 13, 2022
Int. Cl. A61F 2/38 (2006.01); A61F 2/30 (2006.01)
CPC A61F 2/389 (2013.01) [A61F 2/3859 (2013.01); A61F 2002/30131 (2013.01); A61F 2002/30621 (2013.01); A61F 2002/3863 (2013.01)] 20 Claims
OG exemplary drawing
 
1. 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 defined by a continually decreasing radius of curvature; 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 contacts the medial dwell point at a first contact point on the first curved femoral surface section at a first degree of flexion and contacts the medial dwell point at a second contact point on the first curved femoral surface section at a second degree of flexion, wherein the second contact point is posterior of the first contact point and wherein the second degree of flexion is greater than the first degree of flexion, and
wherein the medial articular surface includes a sagittal concave curvature that has a first sagittal conformity with the medial condyle at a location anterior to dwell point at the first degree of flexion and a second sagittal conformity with the medial condyle at the location anterior to the dwell point at the second degree of flexion, wherein the second sagittal conformity is greater than the first sagittal conformity to reduce anterior translation of the medial condyle at the second degree of flexion.