A bone mill for converting cadaver bone into controlled size fragments. B is fed into a vertical channel which is horizontally intersected by a toothed cutter bar. The cutter bar shearingly contacts the front edge of the bone supply channel shearing the bone into fragments. The cutter bar is driven by an air-cylinder driven by an external source of compressed air. A relay box on the bone mill may be unplugged from the mill and removed allowing the remainder of the mill to be sterilized in an aut...

Bone splints are provided which include a wire or pin with an easily attachable and detachable retainer or retainers secured thereto, which splints do not migrate into the bones or tissue of the person undergoing treatment.

The invention is directed toward a bone block, a bone-tendon-bone assembly and method of tendon reconstruction in which at least one tendon replacement is extended between two bone blocks and fixed within each of two bone tunnels in the bones of a joint using interference screws. Each bone block has a central through going bore and at least one substantially parallel channel longitudinally cut in the exterior of the bone block body in which the ligament replacements are seated. One end of each b...

A bone screw is provided with screw threads which are like-handed but of different pitch on its respective leading and trailing ends. In the more favored embodiment, the pitch of the leading screw thread exceeds that of the trailing screw thread. Such a screw may be used to hold portions of a fractured bone in compressive engagement.

A bone gage for measuring the thickness or diameter of a bone. The bone gage comprises a body having mounted thereon extended wire hooks formed with jaws which are adapted to be extended through a hole formed in the bone structure, and which spring between open and closed position to engage and disengage the distal edge of the bone to be gaged. A measuring sleeve is operatively associated with the body so as to be freely slidable relative to the body, toward and away from the bone to be measured...

A prosthetic device with sub-periosteal, periosteal, or bone surface attachment for stress support, comprising a rigid reinforcing member and an elastomer-impregnated fibrous or woven fabric covering such member and firmly fixed to it. In one embodiment, a fibrous reinforced elastomer condyle-like member is affixed to one end of such reinforcing member, and a flexible pedicle extends outwardly from such condyle-like member and has at its remote end a bone-attaching head comprising a flat or disc...

The invention relates to a plate adapted to be secured to a bone surface in order to set broken bones, the plate having a modified I configuration in cross section for maximum strength characteristics and to enable the plate to be fitted against bones of varying surface contours, while the plate is of minimum thickness. The plate is provided with a plurality of countersunk apertures or slots to enable the plate to be secured to the bone by means of screws.

A bone substitute and a method for preparing the bone substitute in which porous aluminum oxide is initially impregnated with pure methyl methacrylate monomer. The monomer is polymerized by gamma irradiation and polymer is then removed by solution from selected areas where muscle and bone attachment is to be made in situ. Further irradiation sterilizes the bone substitute.

An intramedullary splint possesses a longitudinal slot whose opposite edges are formed to engage with the threads of screws securely anywhere along the length of the slot. The splint element is transversely arcuate for engagement inside of the bone canal. The interaction of the screws and slot allow the splint to be drawn up firmly against the concave wall of the bone for greatest support. The placement of metallic parts inside of the bone rather than on the outside reduces interference with mus...

A substitute for bone ash suitable for the complete or partial replacement of bone ash in the manufacture of bone china (English porcelain) is obtained by the calcination of a mixture of a calcium phosphate and calcium oxide or a precursor thereof at an elevated temperature to give a sintered product of relatively low surface area and the grinding of said sintered product to form a particulate substance having the required characteristics for use as a bone ash substitute.