Reverse shoulder prosthesis

摘要

Various embodiments of the present invention relate to an apparatus and method for reverse shoulder arthroplasty (e.g., reverse total shoulder arthroplasty). In one specific example, a glenoid component used to resurface the scapula may be provided. Of note, unlike traditional total shoulder arthroplasty the glenoid component in a reverse shoulder is convex rather than concave; it acts as a physical stop to prevent the superior migration of the humeral head—a typical occurrence in patients suffering from rotator cuff tear arthropathy (CTA).

主权项

1. A glenoid assembly for a reverse shoulder prosthesis comprising:
a glenosphere including a hollowed out portion, an articular surface,
wherein the glenosphere has a central horizontal axis and a central vertical axis that intersect at a central point; and a glenoid plate including a body portion and a stem portion,
wherein the glenoid plate is operatively connected to the hollowed out portion of the glenosphere,wherein the body portion of the glenoid plate has a front face, a back face and a thickness therebetween,wherein the body portion of the glenoid plate has a central horizontal axis that is shorter than a central vertical axis,wherein the central horizontal axis and the central vertical axis intersect at a central point that divides the body portion into an upper half, a lower half, a right half and a left half,wherein the stem portion has a central longitudinal axis which is 90 degrees relative to the central vertical axis of the body portion, andwherein the stem portion extends from the back face of the body portion of the glenoid plate from a position on the body portion of the glenoid plate such that the central longitudinal axis of the stem portion is superiorly shifted from the central point of the body portion of the glenoid plate along the central vertical axis,
wherein the central point of the glenosphere and the central point of the body portion of the glenoid plate are aligned about a common horizontal axis.