Patent ID: 7341602

Claim:
A unicompartmental knee prosthesis for implantation into a knee joint compartment between a femoral condyle and its corresponding tibial plateau, the prosthesis being implantable without requiring bone resection, the prosthesis comprising: a body having a substantially elliptical shape in plan, the body having a first face and an opposed second face, the body without perforations extending from the first face to the second face, the second face including a concave surface and having an anterior to posterior radius A, the prosthesis free of any means of fixation within the knee joint compartment and configured to be movable within the knee joint compartment during knee articulation; and 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 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 D is from about 0.7A to about 1.3A.