In one embodiment a method of implanting a prosthetic includes implanting a first member including a concave articulation surface portion defined by a first radius of curvature in a first bone, implanting in a second bone a second member including a first convex articulation surface portion defined by a second radius of curvature and a second convex articulation surface defined by a third radius of curvature, wherein the second convex articulation surface is defined by the lemon portion of a spindle torus and each of the second radius of curvature and the third radius of curvature has a length that is different from the length of the first radius of curvature by less than 0.05 millimeters and wherein the origin of the second radius of curvature is not coincident with the origin of the third radius of curvature, and bringing the first member into slidable contact with the second member

A spinal implant comprises a plurality of members. At least one element connects the members. An agent is disposed with at least one of the members. The members and the agent are disposable between a configuration for simultaneous delivery to a surgical site and an implant configuration. Systems, spinal constructs, surgical instruments and methods are disclosed.

Implants for the fusion or fixation of two bone segments are described. For example, the implants can be used for the fusion or fixation of the sacroiliac joint. The implants can have a matrix structure, have a rectilinear cross-sectional area, and have a curvature.

A prosthetic ball for use in a ball and cup joint system includes a spherical cap articulation portion defined by a first radius of curvature, and a toroidal articulation portion defined by a second radius of curvature having a circular origin such that the toroidal articulation portion is defined by a portion of the inner surface of a spindle torus.

Implants for the fusion or fixation of two bone segments are described. For example, the implants can be used for the fusion or fixation of the sacroiliac joint. The implants can have a matrix structure, have a rectilinear cross-sectional area, and have a curvature.

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.

Implant includes a body and a utile feature, for example, a smooth articulating surface. A transverse rail stem system with a plurality of rails is provided, spaced apart from the utile feature, which is adapted for transverse insertion into a bodily substrate, for example, resected bone. A surgical templatefor example, to assist in sawing, drilling with a drill bit and drill guide, and broaching with a broachalong with such bone removal tools can help prepare the bone for receipt of the implant.

An implant for insertion between vertebral bodies of the spinal column, with a main body which is formed along a longitudinal axis and at least one end of which an attachment plate with a contact surface for attachment to an adjacent vertebral body is disposed, which plate is mounted on main body pivotably about a pivot axis, arranged substantially perpendicular to the longitudinal axis, and which can be fixed at an angle relative to it or relative to the longitudinal axis. The main body is assigned at least one clamping element. The attachment plate has a clamping surface on a side facing the main body, and the clamping element is movable between a pivot configuration, in which the attachment plate is pivotable, and a clamping configuration, in which the angle and thereby the attachment plate are fixed by an interaction of the clamping element with the clamping surface.

A femoral head resurfacing implant includes a head having a rim separating an outer surface of the head from an inner surface of the head. The head has a shape such that a first plane extends through three separate locations along a length of a rim of the head. The implant also includes a stem extending from the inner surface of the head to a tip that is interior to an opening of the implant. Additionally, the stem is entirely on the first side of the first plane. The stem may be configured to be implanted within the natural bone of a patient at an angular offset designed to preserve the integrity of the preexisting bone structure.

System and methods for bone fusion are disclosed. The systems and method are directed to forming complementary surfaces on bones on either side of an interphalangeal joint and limiting the relative movement thereof so as to promote fusion of the joint.