Patent ID: 8062377

Claim:
A system for use in a posterior cruciate ligament retaining total knee arthroplasty procedure, comprising: a posterior cruciate ligament retaining femoral prosthetic implant for attachment to a femur during the posterior cruciate ligament retaining total knee arthroplasty procedure, the femur having a long axis, the femoral implant comprising: an outer bearing surface having a medial condylar portion, a lateral condylar portion and a patellofemoral portion; an inner bone contact surface in back to back disposition with the outer bearing surface, the inner contact surface including a posterior contact surface, a distal contact surface, and an anterior contact surface, the inner bone contact surface having a mediolaterally extending fixation profile corresponding to a mediolaterally extending resection profile of cut surfaces on the femur, a portion of the fixation profile including a continuous, non-colinear cross-section including at least partially anterior to posterior extending bone facing elements configured to prevent motion between the femoral implant and the femur mediolaterally by a material interference between the resected bone and the inner bone contact surface in a medial-lateral direction, wherein the medial condylar portion and the lateral condylar portion of the outer bearing surface have a notch therebetween configured to accommodate a posterior cruciate ligament; the anterior contact surface has a cross-section normal to a mediolateral direction defining an anterior fixation path that is configured to diverge proximally away from the long axis of the femur and no portion of the anterior fixation path is configured to converge proximally toward the long axis of the femur when viewed in the mediolateral direction; the posterior contact surface has a cross-section normal to the mediolateral direction defining a posterior fixation path that is configured to converge proximally toward the long axis of the femur; the fixation profile has a portion that extends inwardly to provide medial or lateral abutment of the inner bone contact surface with a cut surface on the femur; and the posterior fixation path of the posterior contact surface and the anterior fixation path of the anterior contact surface converge toward one another and intersect at a point proximal of the distal contact surface when viewed as projected on a plane defined normal to the mediolateral direction; and a tibial prosthetic implant for attachment to a resected surface of a tibia during the posterior cruciate ligament retaining total knee arthroplasty procedure, the tibial implant having an articular surface for articulating with respect to the outer bearing surface of the femoral implant and a bone contact surface for contacting a resected surface of the tibia.