A stemless humeral component for replacing the humeral head of a patient's humerus includes a support flange having a number of cantilevered legs extending distally away from a bottom surface thereof. Instruments and methods for surgically installing the stemless humeral component are also disclosed.

Arthroplasty components include an articular surface and a bone-facing surface. The bone-facing surface includes a concave arrangement of planar surfaces which converge as they approach a middle portion of the articular surface. Instruments and implantation methods are also disclosed.

The invention concerns a method for manufacturing a prosthesis (11) for a fractured long bone of a patient, the method comprising the steps of: A) providing data representative of the fractured long bone, the fractured long bone comprising a diaphyseal fragment (2) comprising a medullary cavity (8); B) based on said data, designing the prosthesis specifically to the patient, the prosthesis comprising a stem part (12) configured to be inserted into the medullary cavity, step B) comprising: a sub-step of choosing, specifically to the patient, a contact zone (40) of the medullary cavity onto which a respective chosen mechanical stress is planned to be applied by the stem part, and a sub-step of designing the stem part so that the stem part may be inserted into the medullary cavity and thus apply the chosen mechanical stress to said contact zone; and C) manufacturing the prosthesis designed at step B).

A method of implanting a prosthetic stemless shoulder implant may include making an incision into a patient's shoulder area of a patient and passing a cutting instrument through a rotator cuff interval of the patient. A central portion of the native humeral head may be resected and removed so that a central void remains. The same or another cutting instrument may be inserted through the rotator cuff interval and into the central void. Medial and lateral portions of the native humeral head adjacent the central void may be resected and removed. A base of a prosthesis may be implanted into a proximal portion of the humerus after passing the base through the rotator cuff interval, and two humeral head portions may be inserted through the rotator cuff interval and coupled to the base and to one another.

Systems and methods for modifying a shoulder joint configuration exhibiting wear that take into account resultant of forces responsible for the wear of the glenoid surface from geometric characteristics of wear.

A shoulder arthroplasty kit includes a combination sizer and guide device with a base portion including a rim configured to be positioned against a resected surface of a humerus. A cavity which is configured to receive a mounting portion of a humeral base component extends proximally from the base portion, the cavity. The combination sizer and guide device includes a convex outer surface which replicates at least a part of an outer bearing surface of a humeral head component. A bore which is perpendicular to the distal plane extends between the cavity and the convex outer surface. The kit further includes a guide pin with a maximum diameter sized to fit within the bore such that the guide pin is guided by the bore during insertion of the guide pin into the resected surface of the humerus.

A stemless humeral component for replacing the humeral head of a patient's humerus includes a support flange having a number of cantilevered legs extending distally away from a bottom surface thereof. Instruments and methods for surgically installing the stemless humeral component are also disclosed.

A shoulder arthroplasty kit includes a humeral head component, a combination sizer and guide device substantially identical to the humeral component but including a including a guide bore, and a guide pin configured to be inserted into the resected surface of the humerus and configured to be guided by the guide bore to a center of the resected surface of the humerus which is covered by the at least one combination sizer and guide device.

A stemless humeral component for replacing the humeral head of a patient's humerus includes a support flange having a number of cantilevered legs extending distally away from a bottom surface thereof. Instruments and methods for surgically installing the stemless humeral component are also disclosed.

A stemless prosthetic shoulder joint may include a prosthetic humeral head and a stemless base. The stemless base may include a collar and an anchor extending from the collar intended to anchor the base into the proximal humerus. The anchor may include various features to enhance the fixation of the base, including hooks, threads, and/or expandable members that may be transitioned from a contracted insertion condition to an expanded implanted condition once the base is positioned in the bone. The anchor and/or collar may also include additional features to enhance fixation, such as geometries and surface features to enhance fixation to bone. The anchor may include a plurality of chisel slots to facilitate removal of bone during a revision surgery.