The present invention is directed to a modular assembly for an arthroplasty in a long bone and methods for achieving an anatomically accurate reconstruction. A modular arthroplasty assembly includes the components of: a convertible offset coupler bounded on a first side by an implant surface adapted to receive an implant component, and bounded on an opposite second side by a bone anchor engagement surface, prosthesis component and a bone anchor configured to be inserted in bone and adapted for engagement with the convertible offset coupler. Together, the components of the system, including the array of selectable engagement orientations of the components, enables adaptation to the existing anatomy of the patient and the ability to most closely achieve the native anatomy of the healthy shoulder joint so as to provide the patient with the most natural use of the joint. The system also provides a solution for reverse arthroplasty and conversion from anatomically correct to reverse that avoids a boney procedure on revision and minimizes humeral distalization.

Various embodiments disclosed herein relate to stemmed and stemless humeral anchors for use in shoulder arthroplasty procedures. For example, the humeral anchor can include a first end, a second end, and an interior surface extending between the first end and the second end. The interior surface can be disposed about a recess disposed between the first end and the second end. The recess can be configured to secure a coupling of a shoulder articular body directly to the interior surface.

In one embodiment, a humeral implant is provided that includes a hollow stem and a mounting end. The hollow stem has a sharp distal edge. The mounting end has a mounting hole and a mounting channel disposed about the mounting hole. The mounting hole is configured to receive a tapered projection of an anatomic articular body. The mounting channel is configured to receive an annular projection of a reverse articular body.

The present invention discloses a proximal humerus fixing device. The fixing device comprises: a fixer, a main nail, anti-rotation nails and locking nails; the fixer is disposed in a medullary cavity of the proximal humerus and is matched with the medullary cavity of the proximal humerus; the upper end of the fixer comprises a first contact portion and a second contact portion; the first contact portion is in contact with a head of the humerus and is of a plane structure; the second contact portion is in contact with the greater tuberosity of the humerus and is in a protrusion shape; the far end of the lower end of the fixer is in a bullet shape, and the lower end of the fixer is not in contact with the medullary cavity; the main nail is used for fixing the head of the humerus and the first contact portion; the head of each anti-rotation nail enters the head of the humerus, and the tail portion of each anti-rotation nail is fixedly connected with the fixer; the locking nails are disposed on the lower end of the fixer and are used for enabling the fixer and the humeral shaft to be fixedly connected with each other. The proximal humerus fixing device of the present invention is applied to the proximal humerus serious comminuted fracture complicated by or not complicated by shoulder dearticulation, the fixing treatment effect is good, and the surgical risk is small.

A shoulder replacement system including a humeral head having a curved exterior surface and a generally planar exterior surface. The humeral head can define a main body axis extending transversely from the generally planar exterior surface to the curved exterior surface. The humeral head can also include a polar axis extending parallel to the planar exterior surface from an outer edge of the humeral head intersecting the main body axis and an equatorial axis extending parallel to the planar exterior surface from the outer edge of the humeral head intersecting the main body axis and the polar axis. The shoulder replacement system can also include a humeral stem insertable into a humerus and a glenoid implant that can be engaged to bone defining a glenoid cavity and defining an articulating surface.

Modular humeral implants and methods of use. A humeral implant can include a stem portion, a metaphyseal portion, a locking element, and an intermediate portion. The intermediate portion can include at least one spacer. Each spacer can include a proximal engagement feature, a distal engagement feature, a lumen extending longitudinally through the spacer, and a pin slidable within the lumen of the spacer. Distal movement of a locking element in the metaphyseal portion can translate the pin of each spacer to secure the metaphyseal portion, the intermediate portion, and the stem portion in a locked configuration.

Various embodiments disclosed herein relate to stemmed and stemless humeral anchors for use in shoulder arthroplasty procedures. For example, the humeral anchor can include a first end, a second end, and an interior surface extending between the first end and the second end. The interior surface can be disposed about a recess disposed between the first end and the second end. The recess can be configured to secure a coupling of a shoulder articular body directly to the interior surface.

An instrument to insert a humeral anchor includes a handle including a shaft extending from a first end to a second end; a manual grip at the first end configured to rotate the shaft; and a humeral anchor grip at the second end, wherein the handle is configured to actuate the humeral anchor grip between a first configuration to apply a radially outward force to an interior surface of the humeral anchor and a second configuration to separate the humeral anchor grip from the interior surface of the humeral anchor.

Modular humeral implants and methods of use. A humeral implant can include a stem portion, a metaphyseal portion, a locking element, and an intermediate portion. The intermediate portion can include at least one spacer. Each spacer can include a proximal engagement feature, a distal engagement feature, a lumen extending longitudinally through the spacer, and a pin slidable within the lumen of the spacer. Distal movement of a locking element in the metaphyseal portion can translate the pin of each spacer to secure the metaphyseal portion, the intermediate portion, and the stem portion in a locked configuration.

In one embodiment, a humeral implant is provided that includes a hollow stem and a mounting end. The hollow stem has a sharp distal edge. The mounting end has a mounting hole and a mounting channel disposed about the mounting hole. The mounting hole is configured to receive a tapered projection of an anatomic articular body. The mounting channel is configured to receive an annular projection of a reverse articular body.