Patent ID: 8157867

Claim:
A trochlear groove implant for articulating with a patella, the trochlear groove implant comprising: a body having a first side with an articular surface, an opposing second side with a bone apposition surface, and a substantially uniform thickness between the articular surface and the bone apposition surface such that, at all locations at least 2 mm in from a perimeter edge of the body, the thickness of the body between the articular surface and the bone apposition surface does not vary by more than 20%, the articular surface and the bone apposition surface each extending between a proximal end and an opposing distal end of the body; an elongated channel recessed on the first side of the body and longitudinally extending between the proximal end and the opposing distal end of the body, at least a first portion of the articular surface having a substantially smooth convex curvature extending between the proximal end and the distal end of the body, a second portion of the articular surface being at least one of flat and convexly curved in a direction transverse to the elongated channel, wherein the patella rides both in the elongated channel and against the second portion of the articular surface during normal articulation; and an elongated ridge outwardly projecting on the second side of the body and longitudinally extending between the proximal end and the opposing distal end of the body, at least a portion of the bone apposition surface having a substantially smooth concave curvature extending between the proximal end and the distal end of the body.