A laterally deflectable asymmetric implant for implanting into a body may comprise a deflectable piece having distal and proximal ends and assuming a straightened insertion state. The backbone may abut or interconnect with said deflectable piece at the distal end of the deflectable piece. In a fully deflected state the implant may define an asymmetric shape, e.g. a D-shaped loop, defining an at least partially enclosed volume. The deflectable piece may comprise a sequence of segments interconnected at effective hinges. Longitudinal pressure applied to the proximal end of the deflectable piece (or applied to the backbone in an opposite direction) may cause relative longitudinal movement between the backbone and the proximal end of the deflectable piece and may generate outward horizontal movement of the deflectable piece away from the backbone. In one embodiment, the implant is implanted using lateral access into an anterior zone of a vertebra and deployed posteriorly.

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.

A radially expandable spinal interbody device for implantation between adjacent vertebrae of a spine is deliverable to an implant area in a radially collapsed state having minimum radial dimensions and once positioned is then radially expandable through and up to maximum radial dimensions. The expanded radially expandable spinal interbody device is configured to closely mimic the anatomical configuration of a vertebral face. The radially expandable spinal interbody device is formed of arced, pivoting linkages that allow transfiguration from the radially collapsed minimum radial dimensions through and up to the radially expanded maximum radial dimensions once deployed at the implant site (i.e. between adjacent vertebrae). The pivoting linkages have ends with locking features that inhibit or prevent overextension of the linkages. In one form of the locking features, one end of the linkage includes lobes that form a pocket while the other end of the linkage includes a projection that is adapted to be received in the pocket of the lobes of an adjacent linkage. A kit is also provided including a tool for the implantation and deployment of the spinal interbody device into an intervertebral space.

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 subtalar implant includes a body having a sidewall defining an outer perimeter of the body. The sidewall defines an inner volume. A porous material is disposed within the inner volume. The porous material has a porosity configured to promote bone ingrowth. The porosity of the porous material can be about 30% to about 70% by volume. The sidewall can include a smooth surface configured to prevent bone ingrowth.

A prosthetic joint includes: (a) a first member comprising rigid material and having a perimeter flange defined by an undercut groove, the flange defining a wear-resistant first contact surface having a protruding rim; (b) a second member comprising rigid material and having a perimeter flange defined by an undercut groove, the flange defining a wear-resistant, second contact surface having a protruding rim; and (c) a third member comprising rigid material positioned between the first and second members, the third member defining opposed wear-resistant third and fourth contact surfaces; (d) wherein the first and second contact surfaces bear against the third and fourth contact surfaces, to transfer loads through the member, while allowing pivoting motion between the first and second members; (e) wherein the flanges can deform elastically such that the first and second contact surfaces conform to the third and fourth contact surfaces.

The present application relates to a facet joint prosthesis comprising a first component having a first disc with a first outer face for engagement of a first bone. The first outer face has an opposed first inner face, which includes a first post connecting said first disc to a tongue. The facet joint prosthesis further comprises a second component having a second disc with a second outer surface for engagement with a second bone. The second outer surface has an opposed second inner face, which comprises a bridge located near the periphery of said second disc. Said bridge connects the second disc with a third disc. The third disc comprises a pocket. Insertion of said tongue into said pocket and rotation of said tongue relative to said pocket results in a locking of said tongue between said second disc and said third disc.

A laterally deflectable asymmetric implant for implanting into a body may comprise a deflectable piece having distal and proximal ends and assuming a straightened insertion state. The backbone may abut or interconnect with said deflectable piece at the distal end of the deflectable piece. In a fully deflected state the implant may define an asymmetric shape, e.g. a D-shaped loop, defining an at least partially enclosed volume. The deflectable piece may comprise a sequence of segments interconnected at effective hinges. Longitudinal pressure applied to the proximal end of the deflectable piece (or applied to the backbone in an opposite direction) may cause relative longitudinal movement between the backbone and the proximal end of the deflectable piece and may generate outward horizontal movement of the deflectable piece away from the backbone. In one embodiment, the implant is implanted using lateral access into an anterior zone of a vertebra and deployed posteriorly.