Abstract: An implantable, asymmetrical right or left knee prosthesis for the arthritic, aging, ligament-deficient knee comprising a femoral component, a tibial component and a patella component, forming three interactive knee compartments mainly the lateral, medial, and femoral patellar compartments, articulating together with a dual, axial pivot knee motion. This dual pivot motion pattern is accomplished by four femoral component radii coacting with four reciprocal proximal tibial surface recesses (in a variety of locations on the tibia based on surgeon choice and patient anatomy), accomplishing initial external femur rotation on the tibia (first pivot location), guiding alignment of the femoral-patellar groove with the patellar quadriceps muscle providing knee strength, durability, and stability.

Abstract: The present invention comprises an implantable knee prosthesis for the arthritic, aging, ligament-deficient knee having a femoral component, a tibial component and patella component forming three interactive knee compartments mainly the lateral, medial, and femoral patellar compartments articulating together with a variable axial pivot type of knee motion. This novel design accomplishes this motion pattern with four femoral component radii coacting with four reciprocal proximal tibial surface recesses. This occurs in a laterally congruent axial pivot fashion during the first half of knee flexion creating efficient external femoral rotation to align the femoral-patellar groove with the patella/quadriceps muscle complex.

Abstract: The present invention comprises an implantable knee prosthesis for the arthritic, aging, ligament-deficient knee having a femoral component, a tibial component and patella component forming three interactive knee compartments mainly the lateral, medial, and femoral patellar compartments articulating together with a variable axial pivot type of knee motion. This novel design accomplishes this motion pattern with four femoral component radii coacting with four reciprocal proximal tibial surface recesses. This occurs in a laterally congruent axial pivot fashion during the first half of knee flexion creating efficient external femoral rotation to align the femoral-patellar groove with the patella/quadriceps muscle complex.