Abstract: The present invention provides a prosthesis for implantation at the proximal articular surface of a proximal phalange, of a human great toe. The prosthesis comprises a base portion having a generally concave bearing surface shaped to articulate with the distal articular surface of a metatarsal bone, and a flat surface opposite the bearing surface for emplacement against a resected surface of the proximal phalange of the great toe of the human subject. A stem extends distally from the flat surface of the base portion, for implantation in the intramedulary canal of a proximal phalange of the great toe of the human subject. The stem has a generally frustoconical shape, with a substantially oval wide end at the flat surface of the base portion, tapering to a substantially circular end.

Abstract: An apparatus for guiding the resection of the head of a humerus is provided. The apparatus includes a base, a cut block, and a stylus. The guide is used in connection with a reamer or other tool that is inserted into the intramedullary mayal of the humerus with the shank of the reamer extending superiorally above the head of the humerus to establish the axis of the humerus. The base is in rotatable connection with the reamer. The cut block is removably attached to the guide and has a component for receiving a saw blade. The stylus attaches to the cut block, preferably by engaging the component for receiving the saw blade, and extends around the articular margin of the humeral head to aid in setting height and version.

Abstract: A series of humeral stems, each stem including an axial bore and longitudinal slots along the distal end to allow for distal compression. The compression force necessary to compress the distal diameter of each stem varies by stem diameter. Thus, as the stem diameter increases through the series, the compression force decreases. The axial bore and longitudinal slots together form a series of stem segments that assume the shape of the medullary canal, reducing the force exerted upon the canal by the humeral stem.

Abstract: An apparatus for guiding the resection of the head of a humerus is provided. The apparatus includes a base, a cut block, and a stylus. The guide is used in connection with a reamer or other tool that is inserted into the intramedullary mayal of the humerus with the shank of the reamer extending superiorally above the head of the humerus to establish the axis of the humerus. The base is in rotatable connection with the reamer. The cut block is removably attached to the guide and has a component for receiving a saw blade. The stylus attaches to the cut block, preferably by engaging the component for receiving the saw blade, and extends around the articular margin of the humeral head to aid in setting height and version.

Abstract: A series of humeral stems, each stem including an axial bore and longitudinal slots along the distal end to allow for distal compression. The compression force necessary to compress the distal diameter of each stem varies by stem diameter. Thus, as the stem diameter increases through the series, the compression force decreases.

Abstract: A series of humeral stems, each stem including an axial bore and longitudinal slots along the distal end to allow for distal compression. The compression force necessary to compress the distal diameter of each stem varies by stem diameter. Thus, as the stem diameter increases through the series, the compression force decreases.

Abstract: There is described an implant for resurfacing a damaged base portion of a proximal phalanx of a great toe in a metatarsophalangeal joint. The implant comprises an ovoid shaped base plate having a concave proximal bearing surface reciprocal to the shape of a head of a metatarsal and a flat rear surface, and a stem shaped anatomically to an intramedulary canal of the proximal phalanx, and the stem projects from the center of the base plate at an anatomical angle following the anatomic angular relation between a shaft and the base portion of the proximal phalanx.

Abstract: An ulnar cut guide alignment system including an ulnar alignment guide having a first end for attachment relative to the proximal end of an ulna, a second end for attachment relative to the distal end of the ulna, and a long axis for placement parallel to the long axis of the ulna; an ulnar cut guide holder including a body having an aperture extending therethrough along a longitudinal axis; and an ulnar cut guide locator for connecting the ulnar cut guide holder to the ulnar alignment guide with the longitudinal axis through the aperture of the body of the ulnar cut guide holder placed substantially coextensive with the articular axis of the trochlear notch of the ulna when the first end of the ulnar alignment guide is attached relative to the distal end of the ulna and when the second end of the ulnar alignment guide is attached to the proximal end of the ulna.

Abstract: An elbow prosthesis having a humeral component which substantially replicates the natural trochlear and capitellum convex bearing surfaces has been generated by computer analysis and may be fabricated by a computer controlled cutting and polishing device or may be made by precision casting from a "best-fit" type generalized series of moulds. The prosthesis may be inserted from the medial side of the elbow after preparing the distal humerus to provide a smooth convex surface which fits closely to an inside concave surface of the prosthetic element. The centroidal longitudinal axis of said convex bearing surfaces is coincident with the centroidal longitudinal axis of the concave surface.

Abstract: A kitchen guillotine is described in which a chopping board is provided with a pivotable sleeve device at one end thereof into which the tip of any available kitchen knife may be inserted so that a chopping action can be achieved by moving the knife handle up and down.

Abstract: A bone cutting device for precision elbow surface replacement arthroplasty and osteotomy is described. A humeral clamping device is provided with an outrigger to hold the ulna in preselected and rigid relation to the humerus. A bond cutting tool such as a burr is inserted into a selected guide sleeve mounted for oscillatory arcuate movement on the medial side of the clamping device, so as to precisely prepare the humerus. The humeral guide sleeve is removed and replaced with a slightly longer second sleeve which provides the precise spacing required to prepare the ulna in similar manner. A planar radial cutting guide may be mounted on the lateral side of the clamping device, to guide a planar oscillating saw used to prepare the proximal end of the radius.

Abstract: A bone cutting device for precision elbow surface replacement arthroplasty and osteotomy is described. A humeral clamping device is provided with an outrigger to hold the ulna in preselected and rigid relation to the humerus. A bone cutting tool such as a burr is inserted into a selected guide sleeve mounted for oscillatory arcuate movement on the medial side of the clamping device, so as to precisely prepare the humerus. The humeral guide sleeve is removed and replaced with a slightly longer second sleeve which provides the precise spacing required to prepare the ulna in similar manner. A planar radial cutting guide may be mounted on the lateral side of the clamping device, to guide a planar oscillating saw used to prepare the proximal end of the radius.

Abstract: A bone clip for surgical repair of bones in vivo, having a body and depending legs at each end thereof and perpendicular thereto. Means are provided to draw the legs inwardly towards each other after insertion into the bone so as to draw the bone ends together under a preselected pressure.

Abstract: A bone clip for surgical repair of bones in vivo, having a body and depending legs at each end thereof and perpendicular thereto. Means are provided to draw the legs inwardly towards each other after insertion into the bone so as to draw the bone ends together under a preselected pressure.