“…These pathologies include osteoarthritis (OA), 5,10,16,17,24,25,28,35,38,39,43,46,50,59,60 rheumatoid arthritis (RA), 5,19,20,23,32,33,35,40,61,62 rotator (RC) tear arthropathy, 4,18,35,54,55,64,65 osteonecrosis, 12,30,31,35,37,41 and fractures of the humeral head. 1,2,5,11,26,34,36,45,51,53 Outcomes of patients with RC deficiency, having undergone a TSA or hemiarthroplasty (HA), have not been uniform.…”