“…Since Food and Drug Administration approval in 2004, reverse total shoulder arthroplasty (RTSA) has gained popularity as an effective means of achieving pain relief and improved function in a variety of complex shoulder conditions including cuff tear arthropathy, 17,34,45 massive, irreparable rotator cuff tears, 10,12,17 inflammatory arthritis, 15,21,23,63 acute proximal humerus fractures, 7,38,64 fracture sequelae, 4,39,62 and failed shoulder arthroplasty. 6,37,62 Despite promising reports of dramatic improvement in pain scores, functional outcome scores, range of motion (ROM), patient satisfaction, and costeffectiveness at early and midterm follow-up, primary and revision RTSAs have been associated with relatively high complication rates, with recent studies reporting ranges of 4.3% to 37.5% and 19% to 50%, respectively.…”