Parada SA, Flurin PH, Wright TW, et al. - Using an international database of patients who received a single platform total shoulder arthroplasty system, researchers here examined the types, incidence and timing of complications following anatomic (aTSA) and reverse (rTSA) total shoulder arthroplasty in order to quantify the types of failures modes and the differences that occur between aTSA and rTSA. An international database of primary shoulder arthroplasty performed by 40 different surgeons in the US/Europe yielded data of 2,224 aTSA (1090M/1134F) and 4,158 rTSA (1478M/2680F) patients for inclusion in this study. There were 239 adverse events for a complication rate of 10.7% and 124 revisions for a revision rate of 5.6% among aTSA patients; the top three associated complications were rotator cuff tear/subscapularis failure, aseptic glenoid loosening and infection. They identified 372 adverse events for a complication rate of 8.9% and 104 revisions for a revision rate of 2.5% among those with rTSA; the top three associated complications were acromial/scapular fracture/pain, instability and pain. For the two devices, similar rate of infection was reported.