A joint prosthesis is provided that includes a proximal implant for attachment to a first portion of skeletal anatomy, the proximal implant including a proximal bone attachment portion and a distal cup portion. The prosthesis also includes a distal implant for attachment to a second portion of skeletal anatomy, the distal implant including a distal bone attachment portion and a proximal cup portion. An inter-joint element is located between the distal cup and the proximal cup. The inter-joint element includes surface portions shaped to complement said cups and is preferably formed as an ovoid. Each of the proximal implant, distal implant and inter-joint element include magnetic regions whereby the inter-joint element is attracted to both the proximal cup portion and to the distal cup portion to thereby provide stability across a large angular motion.

There is disclosed herein radial head elbow prosthesis which is anatomically designed to improve anatomical conformity and function and reduce likelihood of dislocation. Depression centroid eccentricity and orientation and raised lateral bearing surface aspects of the present radial head improve tracking of the radial head prosthesis of the capitellum and reduce likelihood of dislocation thereof.

A placeholder for vertebrae or vertebral discs includes a tubular body, which along its jacket surface has a plurality of breakthroughs or openings for over-growth with adjacent tissue. The placeholder includes at least a second tubular body provided with a plurality of breakthroughs and openings at least partially inside the first tubular body. The first and second tubular bodies can have different cross-sectional shapes, can be are arranged inside one another by press fit or force fit or can be connected to each other via connecting pins and arranged side by side to one another in the first body.

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.

Shoulder arthroplasty systems and configurations for components thereof are described. For example, implant systems for a total should arthroplasty (TSA), hemi shoulder arthroplasty, and reverse should arthroplasty (RSA) are described. In addition, exemplary configurations for baseplates, glenoid components, glenosphere components, humeral components, humeral head components, humerosocket components, connectors, and adaptors, are described.

An interbody spacer for the spine is provided. The interbody spacer includes a polymer cage and a plurality of bone screws configured to anchor the cage between two vertebrae of the spine. The cage includes a screw receiver configured to receive a metallic plate screw for attaching a plate to cover the proximal ends of the bone screws to prevent them from backing out over time with respect to the cage. The screw receiver has deflectable extensions that snap into cage to retain the screw receiver to the cage. The screw receiver also includes a transverse flanges that provide anti-rotation and alignment to the screw receiver relative to the cage and; furthermore, the screw receiver further includes a self-locking feature that increases purchase on the plate screw providing a secured cover plate for anti-backout protection for the bone screws.

A tissue fixation system provides a primary fixation plate with a depending graft retention loop and a longer auxiliary fixation plate which fits to the primary fixation plate via upwardly projecting pegs which fit into suture holes in the primary fixation plate. The system has particular utility in cortical fixation procedures in which a graft channel is over-drilled and a longer fixation plate is indicated.

A tissue fixation system provides a primary fixation plate with a depending graft retention loop and a longer auxiliary fixation plate which fits to the primary fixation plate via upwardly projecting pegs which fit into suture holes in the primary fixation plate. The system has particular utility in cortical fixation procedures in which a graft channel is over-drilled and a longer fixation plate is indicated.

A spinal interbody device includes a base link having a first end and a second end, a linkage including a first link having a first end coupled to the first end of the base link and a second end, and a second link having a first end coupled to the second end of the first link and a second end coupled to the second end of the base link. The base link and the first and second links define top and bottom surfaces configured to engage adjacent portions of bone, and first and second sides extending between the top and bottom surfaces. The device further includes at least one radiographic element provided in at least one of the first link and the second link and positioned such that the radiographic element provides an indication of a degree of expansion of the device when the device is imaged from one of the first side and the second side of the device.

An interbody device may include a main body and an arm movably connected thereto. The device may have a first end, a second end opposite the first end in a direction of a longitudinal axis of the device, a first side, a second side opposite the first side in a direction of a first transverse axis of the device, a third side, and a fourth side opposite the third side in a direction of a second transverse axis of the device. An overall distance between the first side and the second side may increase along at least a majority of a length of the device in a direction from the first end toward the second end, and an overall distance between the third side and the fourth side may increase along at least a majority of the length in a direction from the second end toward the first end.