Patent ID: 7329260

Claim:
A kit for locating a distal femoral resection plane in uni-compartmental knee surgery, the kit comprising: a first shim including a first shim arm and a mounting member connected to the first shim arm; a second shim including a second shim arm and a mounting member connected to the second shim arm; and a combination cutting and spacer guide including a cutting block portion and a guide arm portion, the cutting block portion having an anterior side and a posterior side and surfaces defining a cutting guide slot extending from the anterior side to the posterior side, the cutting guide slot lying in a plane defining the distal femoral resection plane, the guide arm portion having a posterior end spaced from the cutting block portion, a planar femoral surface extending outward from the posterior side of the cutting block portion to the posterior end, and a planar tibial surface extending from the cutting block portion outward to the posterior end, the planar femoral surface lying in a plane spaced from the plane of the planar tibial surface, the planes of the tibial surface and femoral surface being substantially parallel to and spaced from the distal femoral resection plane of the cutting guide slot; the combination cutting and spacer guide having a shim mounting opening; wherein each shim arm has a planar guide arm contact surface for contacting part of the guide arm portion and a planar bone contact surface for contacting part of one of the bones of the knee, the mounting member being sized and shaped to be receivable within the mounting opening of the combination cutting and spacer guide to removably mount the shim to the guide arm portion; wherein the planar bone contact surface of each shim arm is parallel to the cutting guide slot when the shim is mounted to the guide arm portion; wherein the planar guide arm contact surface of at least one of the shim arms has a surface area substantially the same as the surface area of the femoral surface of the guide arm portion of the combination cutting and spaced guide; wherein the planar guide arm contact surface of at least one of the shim arms covers at least a portion of one of the planar femoral surface and the planar tibial surface of the guide arm portion when the shim is mounted to the guide arm portion; wherein the first and second shims are discrete components separately mountable to the guide arm portion; wherein each shim arm has a thickness between the guide arm contact surface and the bone contact surface; and wherein the thickness of the first shim arm is less than the thickness of the second shim arm.