#$%^&*AU2014202611B220170525.pdf#####ABSTRACT A knee prosthesis is described. The knee prosthesis comprises a femoral component for replacing at least a portion of a distal end of a femur. The fenoral component comprises a condylar surface configured to articulate with an articular surface of a 5 tibia and a proximal extension extending from a posterior portion of the femoral component. The proximal extension provides a concave articulation surface that is configured to articulate against the articular surface of the tibia. 5382692 1 (GHMatters) P83665.AU.1WO 2009/029631 PCT/US2008/074350 33/38 ----- --..-.. -50 55 FIG. 201 SUBSTITUTE SHEET (RULE 26)