A modular humeral implant for an inverted shoulder prosthesis includes a humeral stem having, on the one hand, a diaphyseal keel of elongate shape, extending along a diaphyseal axis and shaped to be engaged in a medullary cavity of a humerus, and, on the other hand, a metaphyseal portion. A humeral spacer is mounted on the metaphyseal portion of the humeral stem and has a lower face facing the metaphyseal portion, the lower face having a peripheral portion projecting laterally from the metaphyseal portion and covered at least partially with a porous or rough metal surface coating promoting an osseointegration. A humeral insert is fastened on the humeral spacer and has a hemispherical cup shaped to receive a glenosphere of a glenoid implant.

A humeral head assembly is provided that includes an articular body and a coupler. The articular body includes a coupling portion disposed on a side of the articular body opposite an articular surface. The coupling portion includes a continuous zone of eccentricity adjustment. The coupler portion optionally includes one or more than one discrete position site. The coupler includes a first portion and a second portion opposite the first portion. The first portion is configured to mate with the coupling portion and the second portion is configured to mate with another member of a joint prosthesis. A coupling portion with the continuous range of eccentricity adjustment can be provided on a bone anchor and the eccentricity of another component can be selected by motion of a coupler, such as a tray for reverse humeral assemblies, along the coupling portion of the anchor.

A method, and devices for facilitating the method, for shoulder replacement surgery. The method entails establishing a mechanical support in a the anatomical neck plane of the proximal humeral head, fixing a jig to the mechanical support, where the jig supports a drill guide with its axis perpendicular to the anatomical neck plane, adjusting the drill guide it coincide with the axis of the humeral head, drilling a hole through the humeral head for insertion of a shaft which will support and rotate a reaming bit. The reaming bits used to resurface the humeral head and the glenoid fossa are inserted through the back of the patient, through a gap created between two easily separated muscles, rather than through a gap cut through the subscapularis muscle on the front of the joint. A suitable jig is provided to facilitate the method.

This disclosure relates to shield guide assembly and methods for restoring functionality to a joint. The shield guide assembly disclosed herein include a shield dimensioned to block access through the shield onto an adjacent bone surface region during formation of one or more features along the surgical site.

Prostheses that address stress shielding are disclosed. For instance, a knee prosthesis includes a monolithic femoral component having medial and lateral condylar elements for confronting and engaging a natural tibia or a bearing member of a tibial component, an intercondylar notch between the condylar elements for confronting and engaging a natural patella or a patellar component, and an anterior flange extending proximally from the medial and lateral condylar elements and the intercondylar notch. The femoral component defines a bone-facing surface and a bearing surface, the bearing surface including medial and lateral condylar articular surfaces defined by the medial and lateral condylar elements, respectively, and an intercondylar articular surface defined by the intercondylar notch. A slot extends through the femoral component from the bearing surface to the bone-facing surface, the slot starting at an edge of the femoral component and ending at a location within the anterior flange. Methods of making and using the prosthesis are also provided.

A glenoid implant system for use in a reverse total shoulder replacement of a patient that includes a movable glenosphere, a baseplate, and a connector for movably connecting the glenosphere to the baseplate. The glenosphere and the baseplate are configured so that a central axis of the glenosphere is movable non-axially relative to a central axis of the baseplate. Further disclosed is a method having the steps of exposing and resecting a bone, securing a baseplate into the bone with the baseplate having a central axis, securing a glenosphere to the baseplate and non-axially moving the glenosphere relative to the central axis of the baseplate. Also disclosed is a method that includes the steps of rotating an arm in a medial direction, moving a glenosphere anteriorly relative to a baseplate attached to a glenoid, rotating the arm in a lateral direction, and moving the glenosphere posteriorly relative to the baseplate.

Provided herein are rapid and effective local infection therapy methods, systems, and devices that significantly reduce the mortality, morbidity, and the cost of care in rare musculoskeletal infections. Continuous delivery of antibiotic therapy locally, at the infection site, reduces edema and provides antibiotic irrigation, significantly improving outcomes while reducing the need for systemic antibiotics.

A medical implant for a human shoulder joint includes a first magnetic implant fixed to the non-articular surface of the greater tuberosity of the human shoulder joint, and a second magnetic implant fixed to an outer surface and underside of the acromion of the human shoulder joint. At least one of the first and second magnetic implants generates a magnetic field that urges the first and second magnetic implants away from each other and thereby distracts the humeral head of the human shoulder joint from the acromion.

An implant system for total shoulder arthroplasties, hemi shoulder arthroplasties, and “reverse” total shoulder arthroplasties including a humeral stem having an enlarged head portion with interfaces adapted to removably receive various modular interchangeable components, such as articulating liners, spacers, and adapter inserts. The humeral stem functions as a universal platform that may be used in either conventional or “reverse” total shoulder arthroplasties, as well as hemi shoulder arthroplasties, and may remain implanted in place during a revision in which the implant system is converted between the foregoing configurations, for example.

An integral humeral stem includes a diaphyseal portion which has, orthogonal to a diaphyseal axis, an octagonal cross-section with convex rounded angles, and a metaphyseal portion in the form of a flared corolla which extends the diaphyseal portion up to a proximal face, which has, orthogonal to a central axis, an octagonal cross-section with convex rounded angles so that the humeral stem has a peripheral surface provided with eight lateral facets and eight rounded fillets which continuously extend from the diaphyseal portion to the metaphyseal portion. On the metaphyseal portion, the rounded fillets progressively widen and the lateral facets progressively narrow from the diaphyseal portion in the direction of the proximal face.