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

The present invention relates to an articular joint replacement system. The system has first and second components. Each component has a tapered head piece for covering the end of a bone and for acting as an articular surface, an integrally formed screw stem having a length sufficient to extend into the medullary canal, and inwardly angled bone grips affixed to the underside of the head piece to allow solid fixation to the bone by compression press fit. The head piece of the first component is provided with a shaped exterior surface which complements the shaped exterior surface of the head piece of the second component and which allows motion in three planes.

The present invention discloses a bionic artificial interphalangeal joint. The bionic artificial interphalangeal joint includes three sets of proximal prostheses and distal prostheses matched with the proximal prostheses and respectively corresponding to the three joints from the metacarpal bone to the distal phalanx. According to the specific position of the joint to be replaced, the corresponding artificial interphalangeal joint can be selected for replacement. Among them, the bionic artificial interphalangeal joint that can be installed between the metacarpal bone and the proximal phalanx has multiple degrees of freedom, which allows the proximal phalanx to bent in any direction like a real finger, and the bending angle of the proximal phalanx can be up to about 90 degrees when the proximal phalanx is bent toward the inner side of the finger.

The present invention relates to an articular joint replacement system. The system has first and second components. Each component has a tapered head piece for covering the end of a bone and for acting as an articular surface, an integrally formed screw stem having a length sufficient to extend into the medullary canal, and inwardly angled bone grips affixed to the underside of the head piece to allow solid fixation to the bone by compression press fit. The head piece of the first component is provided with a shaped exterior surface which complements the shaped exterior surface of the head piece of the second component and which allows motion in three planes.

The present invention relates to an articular joint replacement system. The system has first and second components. Each component has a tapered head piece for covering the end of a bone and for acting as an articular surface, an integrally formed screw stem having a length sufficient to extend into the medullary canal, and inwardly angled bone grips affixed to the underside of the head piece to allow solid fixation to the bone by compression press fit. The head piece of the first component is provided with a shaped exterior surface which complements the shaped exterior surface of the head piece of the second component and which allows motion in three planes.

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

A facet joint replacement system includes a facet joint replacement device including an enclosing body and an articulating body. The enclosing body includes an interior surface defining an inner cavity of the enclosing body. The interior surface includes a first articulating surface and a projection extending inwardly relative to a surrounding area of the interior surface. The articulating body is positioned within the inner cavity of the enclosing body and is configured to move within the enclosing body. The articulating body includes a second articulating surface and a recess extending inwardly relative to a surrounding area of the articulating body and aligned with the projection of the interior surface of the enclosing body so as to allow movement of the projection along the recess of the enclosing body while constraining rotational motion of the articulating body within the enclosing body.

Implant devices, systems, and methods are used to prevent post-surgical dislocation of a surgically reconstructed ball-and-socket joint, while retaining the patient's range of motion. The implant device can have a cup having a substantially hemispherical inner contour; a head at least partially inserted within the cup, the head having an outer contour that is generally spherically-shaped, and an elastic retainer with an inner contour that is at least a cross-sectional segment of a spherical shape having substantially a same radius as the inner contour of the cup, the elastic retainer being attachable over an open end of the cup to retain the head within the cup and allowing the outer contour of the head to freely rotate and/or pivot against the inner contour of the cup over the predetermined range of motion of the ball-and-socket joint.

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 glenohumeral component of the invention comprises a first side and a second side, which are opposite each other and which, in an implanted state in which the glenohumeral component is free-floating with respect to a humerus and a glenoid of a human shoulder, are in contact respectively with an end portion of the humerus and with a glenoid component intended to be secured to the glenoid. The first side of the glenohumeral component includes a convex articular surface that is designed to articulate with a concave bone surface prepared within the end portion of the humerus. The second side of the glenohumeral component includes a concave articular surface that is designed to articulate with a convex articular surface of the glenoid component. The corresponding shoulder prosthesis is thus reversed. Moreover, the articular interface between the glenoid component, which is secured to the glenoid, and the rest of the prosthesis has double mobility, which provides a greater range of motion between the glenoid and the humerus.