1. An osteotomy guide for indicating the femoral neck resection on a femur having a shaft, a neck extending from the shaft, and a head arising from the neck at the proximal end of the femur, the femoral shaft extending along an anatomic axis from its proximal end to its distal end, a greater trochanter defining the superior-lateral aspect of the femur, the neck and greater trochanter defining a trochanteric fossa between them, the osteotomy guide comprising: an elongated handle; an outrigger extending at an angle from the handle; a paddle mounted on the outrigger for indicating the resection level; and a probe extending beyond the paddle and being engageable with the trochanteric fossa, whereby, with the probe engaging the trochanteric fossa, the elongated handle extends along side the femoral shaft, wherein the paddle includes a first leg and a second leg, the first and second legs defining an angle, the second leg having a top surface defining a reference surface spaced a known distance from the probe, wherein the first leg slides within an opening in the outrigger, wherein the paddle includes a notch, the notch permitting the paddle to be rotated 180 degrees when the paddle is raised such that the notch clears the top of the opening, wherein the paddle further comprises tabs extending outwardly from the top of the first leg, the tabs engaging the outrigger adjacent the opening to prevent the paddle from sliding out of the opening, wherein the paddle further comprises notches formed inboard of the tabs and extending from the top of the first leg downwardly such that the tabs are cantilevered and can be sprung inwardly to allow the paddle to be removed from the opening.