Abstract: A knee prosthesis which comprises a femoral component and a tibial component, for use in a procedure involving removal of the cruciate ligaments, each component extending across the width of the joint, the femoral component presenting a pair of bearing convexities separated by a groove and curving posteriorly and upwardly for flexion, the tibial component comprising a coacting pair of bearing concavities separated by a dome, and presented as a bearing pad or pads supported on a base, the skeleto-prosthetic interface of each component presenting one or more keying element(s) adapted to penetrate the bone.

Abstract: For use in hip arthroplasty procedures there is provided a femoral prosthesis and a separate greater trochanter fixation device which may optionally be used together depending on the approach selected by the surgeon. The fixation device is a stirrup and u-bolt and the stem of the femoral prosthesis may be grooved to receive the fixation device.

Abstract: A prosthesis according to the invention may be used in a hip joint operation by removing the femoral head and greater trochanter from a femur, forming a stem-receiving space in the interior of the femur, inserting the stem of the prosthesis into the space and cementing it in place and re-attaching the greater trochanter to the femur. The greater trochanter is re-attached by forming a pair of holes through the greater trochanter and, if necessary, through adjacent parts of the femur, inserting a U-bolt through the holes in the greater trochanter, the U-bolt passing through the hole in the stem, and pressing the greater trochanter against adjacent parts of the femur. This is done by screwing nuts along threaded limbs of the U-bolt to force clamping means against the trochanter and secure the trochanter in place.