Abstract: A universal patellar clamp is disclosed. The clamp includes an articular surface clamping member having a central aperture defining a centerline axis. The central aperture is sized to accept all available known sizes of cannulated reamers. An anterior clamping member is positioned along the centerline axis and is movable with respect to the articular clamping member to effect clamping of the patella. A pair of guide arms are engaged with the articular clamping member to be positioned over the central aperture and provide a guide hole for supporting a threaded guidewire or pin along the centerline axis. The guide arms are removable from their position over the central aperture to clear the aperture for access by the cannulated reamer.

Abstract: A prosthetic knee joint including femoral and tibial component joined together with support means permitting flexing of the knee and rotational movement of the tibia during flexing approaching that of the matural knee. The support means include flexible synthetic ligaments and various configurations of hinge means.

Abstract: A two-piece patellar prosthesis for use in combination with a prepared patella has a plastic component with a dome, a body portion and a central post and a second metal component engaged to the surface of the first component opposing said dome, said second component having a porous surface to promote bone ingrowth and a plurality of spikes for preventing rotation.

Abstract: A method for preparing a patella for receiving a patellar implant and for implanting a prosthesis therein. An elongated passageway is drilled completely through formed in the patella which is then reamed to form a cavity of a size and configuration to receive the patellar prosthesis using a cannulated reamer telescoped over a guide rod positioned in the elongated passageway. Centering means may be provided for supporting the guide rod. During implantation of the prosthesis, excess marrow fat, blood and debris may escape through the passageway outlet. The second opening acts as a vent to allow optimal cement pressurization and fixation (osseointegrating) and sound patellar prosthesis fixation to the reamed cavity.

Abstract: A patellar prosthesis for use in combination with a prepared patella is provided having a dome, a body portion and a post with longitudinal grooves.

Abstract: A method and apparatus for performing hip prosthesis revision surgery includes preparation of the cavity left after removal of the original prosthesis. A tamp having a longitudinal passageway extending longitudinally through the stem portion thereof and a guidewire positioned in the cavity function to compact bone graft material in the cavity and form a precisely contoured new hip prosthesis receiving cavity.

Abstract: A method for preparing a patella for receiving a patellar implant and for implanting a prosthesis therein. An elongated passageway is formed in the patella which is then reamed to form a cavity of a size and configuration to receive the patellar prosthesis using a cannulated reamer telescoped over a guide rod positioned in the elongated passageway.

Abstract: A femoral stem prosthesis has a first structural collarless component formed of a highly polished metal, double tapered stem extending from a distal end to an enlarged shoulder and a neck and a second component comprising preapplied cement mantle having a thickness in the range of 0.75 to 2 mm extending intermittently throughout a major portion of said stem.

Abstract: A tapered, collarless femoral hip joint prosthesis formed of Co-Cr-Mo alloy with highly polished surfaces is provided.

Abstract: A system for performing hip prosthesis revision surgery includes a trial femoral component having a passageway which, upon insertion in the cavity left after removal of the original prosthesis, provides guide means for drilling a channel to receive a guide wire which, upon removal of the trial femoral component, serves as guide means for progressively larger reamers.

Abstract: A combination extremity sheet and leg holder is provided for supporting the leg of a patient in various positions during various phases of knee surgery.

Abstract: A femoral stem prosthesis has a first structural collarless component formed of a cobalt chrome molybdenum alloy with a highly polished, double tapered stem extending from a distal end to an enlarged shoulder and a neck and a second component comprising a preapplied cement mantle having a thickness in the range of 0.75 to 2 mm extending throughout a major portion of said stem.

Abstract: A system for performing hip prosthesis revision surgery includes a trial femoral component having a passageway which, upon insertion in the cavity left after removal of the original prosthesis, provides guide means for drilling a channel to receive a guide wire which, upon removal of the trial femoral component, serves as guide means for progressively larger reamers.