The present disclosure provides an implant component assembly for a joint replacement. The assembly comprises an implant component, the implant component including an interface part for attaching another implant component and an assembly channel. The assembly further comprises an assembly screw for securing the other implant component to the implant component, the assembly screw having a longitudinal axis, a screw head, and a screw shank and being insertable into the assembly channel. A screw retention unit of the assembly is configured for keeping the assembly screw within the assembly channel and allowing rotation of the assembly screw about the longitudinal axis.

The present disclosure is directed offset adapters, trial implant systems, shoulder implant systems, and methods for total shoulder replacement, wherein the eccentricity of a humeral head relative to a humeral anchor and resected proximal portion of a humerus is selectable by a surgeon. A humeral head implant system includes a humeral head, an adapter, and humeral anchor. An offset adapter is operable to connect the humeral head to a humeral anchor. The offset adapter includes a first tapered cylindrical portion having a first axis, a second tapered cylindrical portion having a second axis, and the first axis being eccentrically disposed relative to the second axis of the adapter. A trial humeral head system includes a trial humeral head, a pin guide, and a trial adapter.

A humeral head implant system includes a head component including a first articulating surface, a second bottom surface extending from the first spherical articulating surface, a first cavity extending a first distance into the head component from the second bottom surface, and a second cavity extending into the head component along a cavity axis. The head component defines a head axis extending through a center of the first articulating surface parallel to the cavity axis. A base component defines a slot extending from a first width to a second width. An insert component includes an insert body, a first engagement feature, and a slot engagement feature. The first engagement feature is received in the second cavity along the cavity axis. The insert body has an insert thickness less than the first distance, and the slot engagement feature slides into the slot in a direction transverse to the cavity axis.

A joint replacement system for repairing an articular surface of a first bone of a joint includes an anchor portion and an implant portion. The anchor portion includes an anchor to be secured to the bone, and an anchor fixation head including a bone-facing surface (BFS) extending radially outward from the anchor and an implant facing surface (IFS) extending from a periphery of the BFS. The implant portion is formed from a material (e.g., CoCr) more dense than the material of the anchor portion (e.g., Ti) and includes a fixation cavity to receive at least a portion of the anchor fixation head (AFH), the fixation cavity includes an anchor facing surface (AFS) configured to form a frictional connection with the IFS, and a load bearing surface having a contour for articulating against a cooperating articulating surface of a second bone of the joint.

A system is disclosed herein for providing a kinetic assessment and preparation of a prosthetic joint comprising one or more prosthetic components. The system comprises a prosthetic component including sensors and circuitry configured to measure load, position of load on a curved surface, joint stability, range of motion, and impingement. In one embodiment, the system is for a ball and socket joint of a musculoskeletal system. The system further includes a computer having a display configured to graphical display quantitative measurement data to support rapid assimilation of the information. The kinetic assessment measures joint alignment under loading that will be similar to that of a final joint installation. The kinetic assessment can use trial or permanent prosthetic components. Furthermore, adjustments can be made to the applied load magnitude, position of load, and joint alignment by various means to fine-tune an installation.

One embodiment of the present disclosure provides a humeral implant. The humeral implant includes a tray including a body defining a bone facing recess and a liner recess, said bone facing recess including a ring surface and a convex surface, wherein the ring surface has a profile substantially corresponding to a profile of an outer ring of bone in an excision site of a patient; and wherein said convex surface has a profile substantially corresponding to a profile of a concave socket formed in the excision site. The humeral implant also includes a liner including a body defining a load bearing surface and a tray interface surface, said tray interface surface being configured to be at least partially received in said liner recess of said tray such that said implant is coupled to said tray.

A glenoidal implant for a shoulder prosthesis includes an articular body having two opposite faces which are an articulation face suitable for cooperating with an articulation head of a humeral implant, and an anchoring face from which at least one anchoring stud protrudes for an anchoring in the glenoid cavity including a main anchoring stud at least partially covered with a porous or rough surface coating promoting an osseointegration. The main anchoring stud is provided internally with a central hole extending along a central axis of symmetry of the main anchoring stud and provided to allow guiding a trephine.

A shoulder prosthesis includes a humeral portion and a scapular portion, each having an osseointegrable component and an articular component. The osseointegrable component in the humeral portion includes a humeral body produced as a semicircular asymmetrical cage having a proximal circular ring base facing the scapular portion and an eccentric distal cylindrical base in opposite position, which are connected by arms having one or more holes for favoring the growth of bone tissue and facilitating anchorage to the bone, the proximal circular ring base being configured to be interchangeably coupled with the articular component for an anatomical prosthesis or a concave insert for a reverse prosthesis. The osseointegrable component in the scapular portion includes a glenoid base-plate of asymmetric form for coupling to an articular component, such as a concave glenoid insert, for an anatomical prosthesis or a glenosphere for a reverse prosthesis.

One embodiment of the present disclosure provides a humeral implant. The humeral implant includes a tray including a body defining a bone facing recess and a liner recess, said bone facing recess including a ring surface and a convex surface, wherein the ring surface has a profile substantially corresponding to a profile of an outer ring of bone in an excision site of a patient; and wherein said convex surface has a profile substantially corresponding to a profile of a concave socket formed in the excision site. The humeral implant also includes a liner including a body defining a load bearing surface and a tray interface surface, said tray interface surface being configured to be at least partially received in said liner recess of said tray such that said implant is coupled to said tray.

The invention relates to a shoulder prosthesis comprising a diaphyseal part extending along a diaphyseal axis and on which an epiphyseal part is mounted, the epiphyseal part having an upper face which is inclined along a front plane with respect to the diaphyseal axis, and a lower central face bearing against a complementary upper face of the diaphyseal part. According to the invention, the epiphyseal part is reversible by rotation through 180° about an axis normal to the lower central face bearing against the epiphyseal part to modify the inclination of the upper face of the epiphyseal part.