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 intervertebral disc implant for use in the spine including a first part and a second part, wherein the first part and second part are configured as a joint prosthesis for the spine. The first part includes one of a concave or convex articulating surface and the second part includes one of the other concave or convex articulating surface. One of the concave or convex articulating surfaces is preferably elliptically shaped in at least one direction and does not match and is different than one of the other concave or convex articulating surfaces.

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 mobile cage system for restoring motion kinematics of the spine featuring a pair of opposing caps that form a cavity and a nucleus disposed in the cavity. The system allows for motion of the caps relative to the nucleus. The mobile cage system provides sufficient support so as to eliminate the need for incorporation of a metal plate or rod and pedicle screws that may be used for spinal fusions. The mobile cage system of the present invention also prevents vertical collapse of the vertebrae and complete bone fusion, and the mobile cage system helps preserve intervertebral motion of the spine.

The present invention relates generally to a prosthetic spinal disc for replacing a damaged or degenerated disc between two vertebrae of a spine. The present invention also relates to prosthetic spinal disc designs that have either or both interlocking and magnetic components.

The present invention provides artificial disc prostheses, methods and instrumentation for implantation and revision thereof. Each prosthesis may comprise superior and inferior end plates and a nucleus positioned between articular surfaces of the end plates. The end plates may have planar bone engagement surfaces with a plurality of self-cutting teeth. The articular surfaces of the end plates may be planar or include a flattened portion. The nucleus includes superior and inferior articular surfaces which may comprise flattened portions such that when the articular surfaces of the nucleus and the end plates are placed in cooperation in a preferred orientation, the flattened and/or planar portions are aligned. Each prosthesis may provide flexion/extension, anterior/posterior translation, lateral bending, and/or axial rotation degrees of freedom. One embodiment comprises a prosthesis with a first joint providing flexion/extension and anterior/posterior translation, and a second joint providing lateral bending and axial rotation.

The present invention relates to an intervertebral disc prosthesis preferably comprising at least three pieces including an upper plate (1), a lower plate (2) and a mobile core (3) at least in relation to the lower plate (2), co-operation means (23, 33) allowing to limit or eliminate the movements of the core (3) in relation to the lower plate (2), in translation and in rotation, respectively, about an axis substantially parallel to the lower plate (2) and about an axis substantially perpendicular to the lower plate (2), at least one part of the surface of at least one plate being concave and complementary with a convex surface (30) of the core (3), with which it is in contact, wherein the tip (31) of the convex surface (30) of the core (3) is off centre, in at least one direction, in relation to the centre (32) of this convex surface (30).

Disclosed are systems, devices, methods and surgical procedures for altering and/or correcting the alignment of adjacent bones, including bones of the spine.

An articulation component (1, 100) is for a bone joint hemiarthroplasty implant having an intramedullary stem (50) with a socket (53). The articulation component has a proximal saddle (2, 110) for non-engaging abutment with a proximal bone and a ball (4, 104) for engaging in the stem socket (53). The saddle has a distally facing recessed surface (10, 110) for engagement with the stem proximally facing surface (55) to define limits of articulation, in one case a cone of motion of about 60 with minimal risk of socket dislocation. Also, the saddle has an enlarged lateral-most edge portion (11, 111, 211) on two diametrically opposed sides of the neck, for conformity with a patients' anatomy.

A two-piece socket for a ball-and-socket arrangement, including a base and a cap. The socket includes a leg on one of the cap or base of the socket and a receiving groove on the other of the cap or base of the socket, wherein there is at least one opening in the leg which lines up with a corresponding opening in the groove for a fastener to extend through these openings to releasably secure the cap to the base of the socket. The orientation of the fastener is such that the fastener is under shear loading when the cap is pulled apart from the base.