US 11,865,011 B2
Medial stabilized orthopaedic tibial insert
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)
Filed by DEPUY IRELAND UNLIMITED COMPANY, Ringaskiddy (IE)
Filed on Jul. 10, 2021, as Appl. No. 17/372,442.
Claims priority of provisional application 63/050,744, filed on Jul. 10, 2020.
Prior Publication US 2022/0008207 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)] 17 Claims
OG exemplary drawing
 
1. A tibial insert comprising:
a lateral articular surface configured to articulate with a lateral condyle of a femoral component and including an arcuate articular path extending in an anterior-posterior direction, wherein the arcuate articular path is defined by a plurality of points on the lateral articular surface and, when the tibial insert is viewed in a cross-sectional medial-lateral plane at each point, each point defines a distal-most point of the lateral articular surface in the corresponding cross-sectional medial-lateral plane, and wherein the lateral articular surface has a cross-sectional concave curvature orthogonal to the arcuate articular path, the cross-sectional concave curvature being uniform at each of the plurality of points; and
a medial articular surface configured to articulate with a medial condyle of the femoral component, wherein the medial articular surface is asymmetrically shaped relative to the lateral articular surface and has a coronal concave curvature that is non-uniform in the anterior-posterior direction, and wherein the medial articular surface includes a sagittal concave curvature, when viewed in a sagittal plane, that is defined by a plurality of curved sections and a medial dwell point that defines a distal-most point of the medial articular surface, wherein the medial dwell point is located on the sagittal concave curvature, and
wherein the plurality of curved sections includes a first curved section adjacent to the medial dwell point and extending posterior therefrom, a second curved section adjacent the medial dwell point and extending anterior therefrom, a third curved section adjacent to the second curved section and extending anterior therefrom, a fourth curved section adjacent to the third curved section and extending anterior therefrom, and a fifth curved section adjacent the fourth curved section and extending anterior therefrom, and
wherein a radius of curvature of the first curved section is greater than a radius of curvature of the second curved section, and wherein a radius of curvature of the third curved section is less that the radius of curvature of the second curved section, less than a radius of curvature of the fourth curved section, and less than a radius of the fifth radius of curvature.