Risk Factors for Dislocation After Reverse Total Shoulder Arthroplasty: A Systematic Review and Meta-Analysis.

Instability after reverse total shoulder arthroplasty (RTSA) is a dreaded complication. Risk factors for postoperative instability are uncertain. The goal of this systematic review was to quantitatively and qualitatively analyze the risk factors for instability after RTSA. Of 1183 studies identified, 12 studies involving 3810 patients were included. The mean age was 68.8 years, and the mean follow-up was 46 months. The pooled rate of dislocation after RTSA was 4.0%. Several patient-specific and implant-specific risk factors have been identified, and especially the implant-specific risk factors appear avoidable with current knowledge, implant design, and technology. [. 2022;45(6):e303-e308.].