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Updated: Jun 29, 2026
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Knotless Independent Double-Row Repair and Biceps Augmentation for Anterosuperior Rotator Cuff Tears
Published on: January 23, 2026
Differential suture loading in an experimental rotator cuff repair.
Christopher Howe1, Philippe Huber, Fredric M Wolf
1Department of Orthopaedics and Sports Medicine, University of Washington, Seattle, Washington 98195, USA.
The American Journal of Sports Medicine
|October 10, 2008
Summary
Rotator cuff repair sutures experience significant tension imbalances with arm rotation. Avoiding external rotation during healing may prevent critical anterior suture overload.
Area of Science:
- Orthopedic Surgery
- Biomechanical Engineering
- Musculoskeletal Research
Background:
- Rotator cuff tear repairs often fail, potentially due to excessive suture tension.
- High tension can cause sutures to pull through the tendon, compromising repair integrity.
Purpose of the Study:
- To investigate how arm positions during early rehabilitation affect suture tension after rotator cuff repair.
- To quantify the relative tension in different sutures based on arm rotation.
Main Methods:
- A controlled laboratory study using a cadaver model.
- A 4-suture supraspinatus repair was performed with transosseous sutures.
- Suture tension was measured using load cells across 12 different arm positions.
Main Results:
- External rotation significantly increased anterior suture tension (over 10x posterior).
- Internal rotation significantly increased posterior suture tension (over 10x anterior).
- Neutral rotation showed no significant difference in suture tension.
Conclusions:
- Early rehabilitation arm positions can create substantial tension imbalances in rotator cuff repairs.
- 30 degrees of internal or external rotation caused significant tension disparities between anterior and posterior sutures.
- Avoiding external rotation during healing may protect critical anterior sutures from overload.
