Patent ID: 8092462

Claim:
A set of spacers for allowing selection of at least one of the spacers for insertion into a knee joint comprising a femur and a tibia, each said spacer comprising a leading end region for insertion between the tibia and the femur and an opposite end region dimensioned to protrude from the knee joint and dimensioned to couple with a guide jig that guides cutting of one or both of the tibia and the femur in the resection of bone, wherein the leading end region of each spacer comprises a thickness dimensioned to space the femur a distance from the tibia and wherein the thickness of the leading end region of at least two of the spacers in the set of spacers differs, wherein a raised ridge oriented in a direction across each said spacer is defined on the leading end region, and each said leading end region is scooped forward of the ridge to thereby define a concave trough dimensioned to receive one of a medial or a lateral condyle of the femur to thereby retain the spacer in the knee joint.