US 12,115,080 B2
Total knee implant prosthesis assembly and method
Chadd W. Clary, Warsaw, IN (US); Paul J. Rullkoetter, Warsaw, IN (US); Mark A. Heldreth, Mentone, IN (US); Travis D. Bennett, Huntington, IN (US); and Richard D. Komistek, Knoxville, TN (US)
Assigned to DEPUY IRELAND UNLIMITED COMPANY, Ringaskiddy (IE)
Filed by DEPUY IRELAND UNLIMITED COMPANY, Ringaskiddy (IE)
Filed on Apr. 14, 2021, as Appl. No. 17/230,376.
Application 17/230,376 is a continuation of application No. 16/246,910, filed on Jan. 14, 2019, abandoned.
Application 16/246,910 is a continuation of application No. 15/222,862, filed on Jul. 28, 2016, granted, now 10,179,052, issued on Jan. 15, 2019.
Prior Publication US 2021/0228367 A1, Jul. 29, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. A61F 2/38 (2006.01); A61F 2/30 (2006.01)
CPC A61F 2/3859 (2013.01) [A61F 2/38 (2013.01); A61F 2/3886 (2013.01); A61F 2/389 (2013.01); A61F 2002/30632 (2013.01); A61F 2002/30662 (2013.01); A61F 2310/00005 (2013.01); A61F 2310/00023 (2013.01); A61F 2310/00029 (2013.01); A61F 2310/00059 (2013.01); A61F 2310/00179 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A total knee implant prosthesis comprising:
a tibial component including a pair of bearing surfaces and a post positioned between the bearing surfaces, wherein the post includes an anterior surface that defines a convex curved line when the tibial component is viewed in a first plane, and
a femoral component configured to rotate relative to the tibial component, the femoral component including (i) a pair of condyles sized and shaped to articulate on the bearing surfaces and (ii) a cam positioned between the pair of condyles, wherein the cam includes a posterior surface that defines a convex curved line when the femoral component is viewed in the first plane and is configured to engage the anterior surface of the post, and
wherein (i) the cam engages the post at a first contact point when the femoral component is at 0 degrees of flexion, (ii) the cam engages the post at a second contact point located lateral of the first contact point when the femoral component is at a first degree of flexion greater than 0 degrees, and (iii) the cam is disengaged from the post when the femoral component is at a second degree of flexion greater than the first degree of flexion.