Bechtold DA, Ganapathy PK, Aleem AW, et al. - This study was undertaken to investigate the glenoid implant inclination, as measured by the Beta angle, as an independent risk factor for instability following primary reverse shoulder arthroplasty (RSA). Researchers conducted a retrospective case-control study matching cases with instability following primary RSA applying a single implant to controls without instability. They compared preoperative, postoperative, and the change in pre to postoperative glenoid inclination (Beta angle) between groups. They matched 34 cases (mean age 66.2 years) with 102 controls (mean age 67.0 years). The results of this study demonstrate that neither the final prosthetic glenoid inclination nor the change in glenoid inclination, as assessed by the Beta angle, significantly influences the risk of prosthetic instability following primary RSA.