Patent ID: 8287545

Claim:
An implantable orthopedic prosthesis for implantation on a bone during a knee arthroplasty procedure, the implantable prosthesis comprising: an implant body having a fixation surface adapted to mate and fixate to a resected articular surface of the bone and an articulation surface adapted to articulate with a second knee arthroplasty implant; at least one projection structure extending inwardly from the fixation surface of the implant body toward the bone; and means for laterally retaining the at least one projection structure such that, when the implant body fixation surface is in contact with the resected surface of the bone in an unloaded condition, as the means for laterally retaining is advanced in a first direction into a corresponding channel formed in the bone a preload force generated by the means for laterally retaining oriented in a second direction is exerted on the implant body biasing the fixation surface of the implant body against the resected surface of the bone and a compressive force is exerted between the corresponding channel and the means for laterally retaining, wherein the second direction is generally perpendicular to the first direction.