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Updated: Dec 9, 2025

Reverse Total Shoulder Arthroplasty
Published on: July 5, 2011
Preoperative external rotation deficit does not predict poor outcomes or lack of improvement after reverse total
Moby Parsons1, Howard D Routman2, Christopher P Roche3
1The Knee, Hip and Shoulder Center, Portsmouth, NH, USA.
Introduction:
The purpose was to compare postoperative outcomes and functional improvement between patients with preoperative aER deficits vs. preserved aER function.
Results:
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.
Conclusion:
This study demonstrates that patients with a complete aER deficit can recover substantial and comparable function after RTSA.
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