Patent ID: 7282054

Claim:
A cut block for cutting the femur and tibia during knee joint replacement surgery, the cut block comprising: a body having a plurality of cutter guides for guiding a cutter to cut the femur and tibia, the body having an anterior face and a posterior face, the cutter guides comprising a femoral cut slot extending from the anterior face to the posterior face to guide a saw blade to cut the femur and a tibial cut slot extending from the anterior face to the posterior face to guide a saw blade to cut the tibia; a first reference surface mounted on the body and projecting posteriorly; a second reference surface mounted on the body and projecting posteriorly, the spacing of the first and second reference surfaces being adjustable vertically from a first position in which they are generally in the same plane to a second position in which they are spaced apart such that the reference surfaces are able to space the tibia away from the femur, the body including an opening from the anterior face to the posterior face between the cut slots to permit viewing of the reference surfaces through the block to verify proper reference surface positioning, the body further comprising a top, a bottom, a first side, and a second side extending between the anterior and posterior faces, the opening also opening toward one of the first and second sides such that the body forms a “C”-shape with the top of the “C” containing the femoral cut slot and the bottom of the “C” containing the tibial cut slot.