Abstract: A tibial baseplate for tibial component of a knee prosthesis including: a bulk solid portion including a proximally facing surface adapted to accommodate a bearing element for the articulation of a femoral component of the knee prosthesis; a plurality of porous portions integral with the bulk solid portion having a porous portion contacting surface opposite to the proximally facing surface adapted to contact a proximal tibia. Advantageously, the plurality of porous portions are seamlessly incorporated and embedded in the bulk solid portion.

Abstract: An instrument is provided for use in shaping a femur preparatory to implantation of a knee prosthesis. A gap checking device is fixed to the distal end of the patient's femur and referenced to the epicondyles of the femur. The gap checking device includes slots through which a cutting instrument can be passed to shape the femur so that it can receive the femoral component of the prosthesis. One of the slots enables the distal femoral cut to be made. The thickness of the gap checking device is selected so that the distance between the distal femoral cut and the distal surface of the gap checking device plus the thickness of a shim resting on the cut proximal tibia surface is equal to the combined thickness of the tibial and femoral components of the prosthesis. This enables balancing of the ligaments to be checked before the femoral cuts are made, but while the gap checking device is secured to the femur.

Abstract: A clamp device, cutting guide, and clamp slider used together in preparation to cutting of the distal end of the femur bone during total knee replacement surgery. The clamp device includes an upper arm and a lower arm rotatably secured to one another in a scissor-like manner. A curved movable component is rotatably secured to the proximal end of the lower arm. The clamp device is positioned around a portion of the distal end of the femur bone so that the distal end of the upper arm grasps a posterior ridge of the femur bone and the movable component of the lower arm is positioned along the contour of the deepest part of the trochlear groove, thereby defining a plane through the deepest part of the trochlear groove of the femur bone. Next, a clamp slider is removably secured to a cutting guide so that channels defined in the clamp slider and cutting guide are substantially aligned with one another.

Abstract: A patella resection and replacement device comprising a pliers-like clamp for gripping and holding the patella, the clamp having a spring biased hinge bolt. A specially designed drill guide may be snapped into place and removed from the hinge bolt without releasing the patella during surgery. Similarly, a specially designed patella button presser may be snapped into place and removed from the hinge bolt. Without the necessity of releasing, re-gripping and re-orienting the patella during the process, the time for the operation is greatly reduced.

Abstract: A prosthesis for replacement of the first metatarsal-phalangeal articulation comprises a metatarsal component and a phalangeal component. The metatarsal component has a convex articulating surface and concave distal aspect, the metatarsal articulating surface being curved so as to approximate the natural articular surface of the first metatarsal bone and furthermore to articulate smoothly with the phalangeal articulating surface of the phalangeal component. The phalangeal component comprises a base member and an insert, the base member having a distal aspect adapted to engage and be secured to a resected end of the phalanx bone and also having a proximal aspect adapted to receive and have permanently attached thereto the insert.