Patent ID: 8337564

Claim:
A knee replacement prosthesis having anterior, posterior, lateral, medial, distal and proximal sides and sagital, coronal and transverse planes, comprising: a) a femoral component that connects to the distal end of a resected femur, said femoral component including medial and lateral condyles having distal, articulating surfaces with a toroidal anterior surface and a toroidal posterior surface with major and minor axes of rotation, and a patellar flange having an articulating patellar surface; and, b) a tibial component that connects to the proximal end of a resected tibia, said tibial component including a proximal medial and lateral bearing surfaces that articulate with said medial and lateral condyles, respectively, said bearing surfaces having a toroidal anterior surface and a toroidal posterior surface with major radii of curvature that are oriented in different planes; wherein said prosthesis enables anterior-posterior translation of the femur relative to the tibia and enables the tibia to rotate about its longitudinal axis during flexion of the knee.