Patent ID: 8043294

Claim:
A femoral caliper for preparing a femur for installation of a femoral component on the femur, said femoral caliper comprising: a reference mark positioning guide configured to be juxtaposed with a planed distal surface of a femur and capable of guiding placement of at least one reference mark on the planed distal surface of the femur, said reference mark on the femur facilitating positioning of the femoral component; a first anatomical reference member comprising a pair of paddles, each paddle configured to abut the posterior surface of a femoral condyle and being moveable in the anterior-posterior direction, the first anatomical reference member being connected to the reference mark positioning guide; a second anatomical reference member configured for placement against the anterior cortical bone of the femur and connected to the reference mark positioning guide opposite the first anatomical reference member; an adjustment mechanism engaged with the reference mark positioning guide and configured to be actuated to continuously displace, at least between standard femoral component sizes, the reference mark positioning guide in the anterior-posterior direction relative to the first and second anatomical referencing members so as to translationally adjust the position of the reference mark on the femur in the anterior-posterior direction, wherein the adjustment mechanism is configured to operatively engage and secure the reference mark positioning guide at least between standard femoral component sizes to facilitate placement of the reference mark in the femur; and a rod receiving member attached to the reference mark positioning guide and the anatomical referencing members, the rod receiving member defining a rod opening configured to slidingly receive an intramedullary rod therethrough, the intramedullary rod being received into a medullary canal of the femur and extending outwardly of the planed distal surface thereof and through the rod opening defined by the rod receiving member, the rod opening and the intramedullary rod received therethrough being complementarily configured to prohibit rotation of the rod receiving member about the intramedullary rod while the reference mark positioning guide is juxtaposed with the planed distal surface.