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Updated: May 17, 2026
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Reverse Total Shoulder Arthroplasty
Published on: July 5, 2011
How does scapula motion change after reverse total shoulder arthroplasty? A preliminary report
Myung-Sun Kim1, Keun-Young Lim, Dong-Hyun Lee
1Department of Orthopaedic Surgery, Chonnam National University College of Medicine, 671, Jebong-Ro, Dong-Gu, Gwangju 501-757, South Korea.
BMC Musculoskeletal Disorders
|October 31, 2012
Summary
Reverse total shoulder arthroplasty (RTSA) alters scapular position and upward rotation compared to the contralateral shoulder. This study quantifies these changes in scapular motion after RTSA.
Area of Science:
- Orthopedics
- Biomechanics
- Surgical Innovation
Background:
- Scapular position changes are documented in shoulder disease but unstudied after reverse total shoulder arthroplasty (RTSA).
- Understanding scapular mechanics post-RTSA is crucial for optimizing patient outcomes.
Purpose of the Study:
- To evaluate changes in scapular position after RTSA.
- To compare scapular position in RTSA patients to their contralateral, non-operated shoulder.
Main Methods:
- Seven patients undergoing RTSA for cuff tear arthropathy were analyzed.
- Scapular lateralization and medial border angle were measured via radiographs at various abduction degrees.
- Measurements were compared between operated and contralateral shoulders.
Main Results:
- Scapulohumeral rhythm differed significantly between operated (2.4:1) and contralateral (4.1:1) shoulders at 120° abduction.
- The operated shoulder demonstrated increased scapular lateralization and upward rotation beyond 30° abduction.
- Radiographic measurements indicated altered scapular kinematics post-RTSA.
Conclusions:
- Scapular position patterns significantly differ after RTSA compared to the contralateral shoulder.
- RTSA leads to increased scapular upward rotation.
- These findings highlight altered biomechanics following RTSA.
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