Incidence and risk factors of acromial fracture following reverse total shoulder arthroplasty

BackgroundThe occurrence and related predictors of acromial fracture following reverse total shoulder arthroplasty (RTSA) have not been fully elucidated. The aim this study was to determine the incidence risk factors fractures after RTSA.MethodsWe conducted a multicenter, retrospective case-control 787 cases (29 in group 758 control group) that underwent RTSA performed by 6 surgeons. mean duration follow-up 31.6 ± 21.8 months (range, 12-136 months). Demographic variables (age, sex, arm dominance, body mass index, working status, bone mineral density [BMD]), clinical (preoperative diagnosis, previous operation, implant design, preoperative scores, screw size glenoid fixation, postoperative rehabilitation), radiographic (acromial thickness, critical angle, deltoid length, humeral offset lateral acromion) were investigated. To correlation, univariate analysis multivariate logistic regression with calculated odds ratios (ORs) performed.ResultsPostoperative occurred 29 shoulders (3.7%). Acromial detected at 10.0 1-66 months) postoperatively. Univariate revealed an significantly associated operation (38% [11 29] vs. 21% [156 758], P = .025) BMD (–2.33 –1.74, .013). Multivariate found (P .034; OR, 2.91; 95% confidence interval, 1.08-7.84) length .004; 1.04; 1.01-1.07).ConclusionAcromial is uncommon complication, overall 3.7%. A increased low RTSA. We performed. Postoperative 1.01-1.07).