Abstract: A system for spinal surgery includes a prosthesis comprising a plurality of bone anchors which engage an intervertebral construct for fusion or motion preservation. The fusion construct comprises a spacer optionally encircled by a jacket. The motion preservation construct may comprise an articulating disc assembly or an elastomeric disc assembly. Any of the constructs may occupy the intervertebral disc space between adjacent vertebrae after removal of an intervertebral disc. The anchors slidingly engage the construct to securely fix the prosthesis to the vertebrae. The anchors and jacket of the fusion construct provide a continuous load path across opposite sides of the prosthesis so as to resist antagonistic motions of the spine.

Abstract: Systems and methods for shaping and filling offset bone voids during revision procedures of total knee replacements are disclosed. The systems disclosed herein generally include an intramedullary reamer, an offset driver, a cylindrical reaming tool, an offset reaming guide, and a conical reamer. An alternate embodiment of the system may also generally include an IM reamer, an offset driver, an offset broaching tool, and a second stage broaching tool. Yet another embodiment may generally include an elongate IM reamer, a cone reamer, a reamer guide shaft, a cone trial, a sizing template, a template guide, an offset lobe reamer, and offset lobe reamer retainer. Metaphyseal reconstruction devices and void filling cones can be used to fill the bone voids in conjunction with the systems and methods disclosed herein.

Abstract: Disclosed herein are systems and methods for shaping bone voids during revision procedures of total knee replacements. The systems disclosed herein generally include a cannulated reamer assembly, a reaming guide assembly, a guide tube assembly, a trial stem assembly, and an optional insertion/removal tool. Metaphyseal reconstruction devices can be used to fill the bone voids in conjunction with the systems and methods disclosed herein.

Abstract: A system for spinal surgery includes a prosthesis comprising a plurality of bone anchors which engage an intervertebral construct for fusion or motion preservation. The fusion construct comprises a spacer optionally encircled by a jacket. The motion preservation construct may comprise an articulating disc assembly or an elastomeric disc assembly. Any of the constructs may occupy the intervertebral disc space between adjacent vertebrae after removal of an intervertebral disc. The anchors slidingly engage the construct to securely fix the prosthesis to the vertebrae. The anchors and jacket of the fusion construct provide a continuous load path across opposite sides of the prosthesis so as to resist antagonistic motions of the spine.

Abstract: A method and instrument is used for inserting a bone screw through a hole in a bone plate into bone at a maximum angulation of a bone screw central longitudinal axis with respect to a central axis of the hole. The maximum angulation places the head of the bone screw at or below an outwardly facing surface of the bone plate. The instrument has a distal end including a gauge element spaced proximally from an end surface of the distal end when in contact with a counterbore surrounding the plate hole a distance less than a depth of the counterbore. The instrument is tilted with respect to a central axis of the bone plate hole to an angle wherein the gauge element remains at or below the outwardly facing surface of the bone plate adjacent the counterbore. A hole is drilled through a guide bore in the instrument.

Abstract: A method for preparing a proximal femoral canal of a patient during total hip replacement surgery uses an instrument having a handle, a shaping member including structure configured to shape bone, wherein the structure configured to shape bone comprises at least two cutting surfaces on opposite sides of the shaping member, and a connecting member connecting the handle and the shaping member, the connecting member having a plurality of transverse cross sections. The connecting member includes a dual offset including a first compound bend between the connecting member and the handle, wherein when following a direction from the connecting member to the handle, the first compound bend includes a bend in a posterior direction and a bend in a lateral direction. The connecting member also includes a second compound bend between the connecting member and the shaping member, the second compound bend in an anterior and a medial direction.

Abstract: In one embodiment, the present invention includes a method for holding soft tissue in apposition with a bone using a suture, the method including engaging the soft tissue with an engaging portion of a suture thread; engaging an end of the suture thread with a rotatable shaft of an anchor; implanting the rotatable shaft in the bone; and rotating the shaft in a first direction to wrap the engaged suture thread onto the shaft thereby increasing tension on the suture and on the soft tissue.

Abstract: In one embodiment, the present invention includes a knotless suture anchor for implanting in bone including an outer tubular member having a distal end, a proximal end, an outer wall, and an at least one aperture through the outer wall; an inner member being rotatably disposed within the outer tubular member, the inner member having an at least one aperture for receiving at least one suture thread; a pointed tip configured to facilitate impaction of the anchor into the bone; and at least one suture thread guide positioned on the outer tubular member, wherein the at least one suture thread is positioned through the at least one suture thread guide, the at least one aperture of the outer tubular member, and the at least one aperture of the inner member.

Abstract: A method for manufacturing of ultrahigh molecular weight polyethylene (UHMWPE) for implants, where the implants have been machined out of UHMWPE blocks or extruded rods, has anthocyanin dispersely imbedded in the polyethylene. The implant is then exposed to ? ray or electron beam irradiation in an amount of at least 2.5 Mrad followed by a heat treatment to prevent the implant from becoming brittle in the long term as well as to improve strength and wear. The method includes mixing a powder or granulate resin of UHMWPE with an aqueous liquid that contains anthocyanin in a predetermined amount. The water is then evaporated to deposit the anthocyanin in a predetermined concentration on the polyethylene particles. The doped UHMWPE particles are compressed into blocks at temperatures in a range of approximately 135° C.-250° C. and pressures in a range of approximately 2-70 MPa. Medical implants are made from the blocks.

Abstract: A method of producing an improved polyethylene, especially an ultra-high molecular weight polyethylene utilizes a sequential irradiation and annealing process to form a highly cross-linked polyethylene material. The use of sequential irradiation followed by sequential annealing after each irradiation allows each dose of irradiation in the series of doses to be relatively low while achieving a total dose which is sufficiently high to cross-link the material. The process may either be applied to a preformed material such as a rod or bar or sheet made from polyethylene resin or may be applied to a finished polyethylene part.

Abstract: A device is disclosed for securing a spinal rod to the spine which includes a head portion configured to receive a spinal rod, a locking cap configured to engage the head portion and the spinal rod upon rotation of the locking cap relative to the head portion to secure the position of the head portion relative to the spinal rod, and a fastener portion depending from the head portion and configured to engage the spine. The locking cap has discontinuous opposed engagement flanges that are received within opposed engagement slots of the head portion when the locking cap is rotated into a locked position.