Patent ID: 8480753

Claim:
A prosthesis for implantation in a prepared trochlear groove of a femur, comprising: a proximal section having a first maximum height in an anterior-posterior direction and a first diameter; an intermediate section having a second maximum height in an anterior-posterior direction and a second diameter, the second maximum height less than the first maximum height; and a distal section having a third maximum height in an anterior-posterior direction and a third diameter, the third maximum height less than the second maximum height, wherein the proximal section, the intermediate section, and the distal section each have a generally flat bone contacting surface, and the flat bone contacting surfaces of the intermediate section and the distal section lie along a same plane, wherein the proximal section intersects the intermediate section at a first intersecting diameter having a length less than the first and second diameters, and wherein the intermediate section intersects the distal section at a second intersecting diameter having a length less than the second and third diameters, the second intersecting diameter having a length less than the first intersecting diameter.