Patent ID: 8128697
Filing Date: 2012-03-06
Classification: A61F

Abstract:
1. A unicompartmental knee prosthesis for implantation into a knee joint compartment between a femoral condyle and its corresponding tibial plateau, the prosthesis comprising: a body having a substantially elliptical shape in plan and a pair of contoured opposed faces including a first face and a second face, the first face including a convex surface comprising substantially an entirety of the first face and the second face including a concave surface, the prosthesis free of fixation to a permanent location within the knee joint compartment and configured to be translatable with respect to the tibial plateau during knee articulation; a peripheral edge extending between the faces and having a first side, a second side opposite the first side, a first end and a second end opposite the first end, the body including a cusp comprising a reverse downward curve with respect to the first face protruding from at least one of the first and second ends for limiting translation of the prosthesis; a first dimension D defined by the first end and the second end; a second dimension F defined by the first side and the second side, and a coordinate system origin (CSO) at an intersection of D and F, the body including a material thickness at the CSO, where the dimension F is from about 0.25 to about 1.5 of the dimension D, wherein the prosthesis is implantable without requiring bone resection.