Does Postoperative Glenoid Component Retroversion Following Anatomic Total Shoulder Arthroplasty Affect Clinical Outcomes? A Systematic Review and Meta-Analysis.

Abstract

Surgeons commonly aim for less than 15 degrees of retroversion when positioning the glenoid component in anatomic total shoulder arthroplasty (aTSA). However, the effect of glenoid component retroversion on patient-reported clinical outcomes remains unclear. Here we present a systematic review and meta-analysis seeking evidence that the clinical results of aTSA are associated with postoperative glenoid component version. Studies reporting postoperative clinical outcomes and measurements of glenoid component version after primary anatomic shoulder arthroplasties were identified and submitted for meta-analysis. Patients were divided into two groups based on postoperative glenoid component retroversion: (a) < 15 degrees and (b) ≥ 15 degrees. Fifteen articles (1190 shoulders) met criteria for inclusion in our systematic review and meta-analysis. When comparing patient reported outcome scores, range of motion, and complications for shoulders with < 15 or ≥ 15 degrees of glenoid component retroversion, no clinically significant differences were noted between the two groups. This review of the published literature did not find evidence that postoperative glenoid component retroversion of < 15 or ≥ 15 degrees was associated with clinically significant differences in patient outcomes. Future studies with long term follow-up will be necessary to demonstrate the effect of glenoid component retroversion on the clinical value, costs and complications of anatomic shoulder arthroplasty. Level IV; Systematic Review; Prognosis Study.