Preoperative external rotation deficit does not predict poor outcomes or lack of improvement after reverse total shoulder arthroplasty.

Parsons, Moby; Routman, Howard D; Roche, Christopher P; Friedman, Richard J · J Orthop · 2020

retrospective_cohort · Level III

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Abstract

The purpose was to compare postoperative outcomes and functional improvement between patients with preoperative aER deficits vs. preserved aER function. There were 115 patients in the <0° aER group and 314 in the ≥30° aER group. Preoperative patients in the <0° group were worse for all measures except subjective pain while post-operatively, they had significantly greater improvement for all measures of motion. Postoperatively, both groups achieved comparable scores for forward elevation, pain, SST and ASES. This study demonstrates that patients with a complete aER deficit can recover substantial and comparable function after RTSA.

Anatomy