Abstract: A method of installing a prosthesis assembly includes installing a base component in a prepared glenoid vault, axially aligning a plurality of slots in one of a stretched glenoid bearing component and a base component with a plurality of ridges in the other of the glenoid bearing component and the base component, each of the plurality of slots having a maximum length which is greater than a maximum length of a respective one of the plurality of ridges, engaging each of the plurality of ridges with the respective one of the plurality of grooves thereby rotatably coupling the glenoid bearing component and the base component and limiting axial movement of the glenoid bearing component relative to the base component, and placing the bearing surface into articulating contact with a humeral head.

Abstract: A prosthesis assembly configured for use with a scapula in one embodiment includes a spherical humeral component, an elongated glenoid bearing including a first bearing surface with (i) a first spherical end portion with a first radius of curvature, (ii) a second spherical end portion with a second radius of curvature, and (iii) a central portion located between the first spherical end portion and the second spherical end portion, and a first coupling portion extending from a second bearing surface opposite the bearing surface, and a base configured to rotatably support the elongated glenoid bearing, wherein the first radius of curvature is substantially equal to the second radius of curvature and the central portion does not have a radius of curvature that is substantially equal to the second radius of curvature.

Abstract: A method of implanting a shoulder prosthesis in a scapula of a patient includes the step of placing a guide over a primary glenoid component previously implanted within the scapula of the patient. The method further includes the steps of removing the primary glenoid component from the scapula and preparing the scapula for implantation of a secondary glenoid component, wherein the removing and preparing steps occur simultaneously.

Abstract: A surgical instrument for removing an implanted glenoid component from the glenoid of a patient includes a protective cannula and a flexible wire saw. The flexible wire saw is positioned in the protective cannula such that both ends of the flexible wire saw extend out of one end of the protective cannula, with a portion of the middle section of the wire saw forming a loop that extends out of the other end of the protective cannula. Surgical methods for the use of such a surgical instrument are also disclosed.

Abstract: A shoulder prosthesis kit includes a first metaglene component including (i) a first body defining an outer diameter, (ii) a first augment extending medially from the first body, and (iii) a first void defined by a portion of the first body and a portion of the first augment, and a plurality of bearing components, each of the plurality of bearing components defining a cavity configured to couple with the first body, and having a bearing surface that is sized differently from the size of another of the plurality of bearing components.

Abstract: A surgical instrument for removing an implanted glenoid component from the glenoid of a patient includes a protective cannula and a flexible wire saw. The flexible wire saw is positioned in the protective cannula such that both ends of the flexible wire saw extend out of one end of the protective cannula, with a portion of the middle section of the wire saw forming a loop that extends out of the other end of the protective cannula. Surgical methods for the use of such a surgical instrument are also disclosed.

Abstract: Reciprocating rasps for the surgical preparation of the bone prior to the implantation of a glenoid or acetabular component with complex geometry are disclosed. Surgical methods for the use of such reciprocating rasps are also disclosed. Some of the methods include inserting a guide pin into the glenoid of the patient, advancing a reciprocating surgical rasp over the guide pin, reciprocating the surgical rasp so as to abrade bone tissue to form a cavity shaped to receive the glenoid component, and implanting the glenoid component in the cavity.

Abstract: A metaglene assembly for use in a shoulder prosthesis includes a metaglene body, an augment, a void, at least one fastener hole, and at least one fastener. The metaglene body has a lateral, prosthesis-facing side, and a medial, bone-facing side. The augment extends medially from the medial, bone-facing side of the metaglene body. The void is defined by a portion of the medial, bone-facing side of the metaglene body and a lateral portion of the augment. The fastener hole extends from the void through the augment. The fastener is configured to extend within the fastener hole.

Abstract: A glenoid component for securement to a glenoid surface of a scapula comprises a body portion having a first surface adapted to contact the glenoid surface of a scapula and a second surface configured to receive the head portion of a humerus. The glenoid component further includes an anchor peg for penetrating the glenoid surface of the scapula so as to secure the body portion to the glenoid surface of the scapula. The anchor peg includes a cylindrical shaft extending from the first surface of the body portion and a fin secured to and extending outwardly from the cylindrical shaft. The glenoid component further includes a feature that prevents rotation of the glenoid component.

Abstract: A method for retraction useable in joint arthroplasty. The method includes using a joint retractor having a first arm and a second arm. The first arm has a first portion and a second portion and the second arm having a first portion and a second portion. The retractor is inserted into a surgical opening of a patient's shoulder joint. The second portion of the first arm is placed against the coracoid process and the second portion of the second arm is placed against the resected humerus. The first portions of the first and second arms are hung over the resected tissue to allow exposure of the glenoid.

Abstract: Reciprocating rasps for the surgical preparation of the bone prior to the implantation of a glenoid or acetabular component with complex geometry are disclosed. Surgical methods for the use of such reciprocating rasps are also disclosed.

Abstract: Reciprocating rasps for the surgical preparation of the bone prior to the implantation of a glenoid or acetabular component with complex geometry are disclosed. Surgical methods for the use of such reciprocating rasps are also disclosed. A reciprocating rasp for use in the surgical preparation of a glenoid includes a shaft having a first end configured to be secured in a chuck of a reciprocating tool, and a cutting head secured to a second end of the shaft. The cutting head includes a cutting surface having a plurality of cutting teeth arranged in a geometry that corresponds with a geometry of the glenoid prosthesis, and an inwardly curved concave guide surface that is devoid of cutting teeth and configured to receive a guide pin inserted in the glenoid of the patient when the cutting head is secured to the second end of the shaft.

Abstract: An orthopaedic shoulder prosthesis includes glenoid defect-filling component configured to be implanted within a defect in a glenoid of a patient. The glenoid defect-filling component includes a porous metallic body and a plurality of holes formed in the porous metallic body, the plurality of holes being arranged in a pattern to receive a number of pegs of a discrete polymer glenoid component.

Abstract: An orthopaedic shoulder prosthesis includes glenoid defect-filling component configured to be implanted within a defect in a glenoid of a patient. The glenoid defect-filling component includes a porous metallic body and a plurality of holes formed in the porous metallic body, the plurality of holes being arranged in a pattern to receive a number of pegs of a discrete polymer glenoid component.

Abstract: A reverse shoulder orthopaedic implant includes a glenosphere component having a lateral bearing surface configured to articulate with a humeral cup of a humeral prosthesis. A metaglene component includes a platform configured to receive glenosphere component.

Abstract: A surgical instrument for removing an implanted humeral stem component from the humerus of a patient includes an offset surgical tamp. A surgical method for the use of such a surgical instrument is also disclosed.

Abstract: A reverse shoulder orthopaedic implant includes a glenosphere component having a lateral bearing surface configured to articulate with a humeral cup of a humeral prosthesis. A metaglene component includes a platform configured to receive glenosphere component.

Abstract: A spreadable retractor for use in joint arthroplasty. The retractor includes a first arm having a first portion and a second portion that is movably coupled to the first portion. The second portion is also coupled to a first retaining member that is sized and shaped to retain a portion of a coracoid process. A second arm is also included in the retractor and is movably coupled to the first arm. The second arm has a first portion and a second portion that is movably coupled to the first portion. Also, the second portion is coupled to a second retaining member that is sized and shaped to couple to a resected humerus.

Abstract: A surgical instrument for removing an implanted glenoid component from the glenoid of a patient includes a protective cannula and a flexible wire saw. The flexible wire saw is positioned in the protective cannula such that both ends of the flexible wire saw extend out of one end of the protective cannula, with a portion of the middle section of the wire saw forming a loop that extends out of the other end of the protective cannula. Surgical methods for the use of such a surgical instrument are also disclosed.

Abstract: Reciprocating rasps for the surgical preparation of the bone prior to the implantation of a glenoid or acetabular component with complex geometry are disclosed. Surgical methods for the use of such reciprocating rasps are also disclosed. A reciprocating rasp for use in the surgical preparation of an acetabulum includes a shaft having a first end configured to be secured in a chuck of a reciprocating tool, and a cutting head secured to a second end of the shaft. The cutting head includes a cutting surface having a plurality of cutting teeth arranged in a geometry that corresponds with a geometry of the acetabular component, and an alignment guide that is devoid of cutting teeth and configured to cooperate with a complementary alignment guide of an acetabular trial instrument when the cutting head is secured to the second end of the shaft.