A FINITE ELEMENT MODELING APPROACH TO UNDERSTANDING CRITICAL MECHANICAL TRADE-OFFS IN REVERSE SHOULDER ARTHROPLASTY

INTRODUCTION Reverse shoulder arthroplasty (RSA) holds increasing attraction as a means to reliably restore pain-free function to patients with glenohumeral arthritis who are rotator cuff-deficient [1]. RSA utilizes a reverse ball-in-socket design, with the humeral component as the socket and the glenoid component the ball (glenosphere), to medialize and distalize the humeral center of rotation (Fig. 1).