Patent attributes
A femoral prosthesis includes a femur body and a cam portion. A joint surface of the femur body has a first joint surface portion for abutting a tibial prosthesis within a first knee flexion angle range from a first knee flexion angle to a second knee flexion angle, and a second joint surface portion for abutting the tibial prosthesis within a second knee flexion angle range from the second knee flexion angle to a third knee flexion angle. At the second knee flexion angle, the first joint surface portion has a first radius of curvature, and the second joint surface portion has a second radius of curvature. A center of a circle of an anterior joint surface of the cam portion is located in a first quadrant of a circle with the second radius of curvature in a sagittal section when the femoral prosthesis is in an extended state.
