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Rotator cuff tears associated with os acromiale
The Journal of Bone and Joint Surgery. American Volume
|March 1, 1984
Summary
This study identifies a link between rotator cuff tears and os acromiale, a separate bone fragment in the shoulder. Abnormal motion at the os acromiale site may cause impingement, leading to rotator cuff tears.
Area of Science:
- Orthopedic Surgery
- Sports Medicine
- Anatomy
Background:
- Rotator cuff tears are common shoulder injuries.
- Os acromiale, an ununited ossification center of the acromion, is a rare finding.
- The association between rotator cuff tears and os acromiale has not been previously documented.
Purpose of the Study:
- To investigate the potential association between rotator cuff tears and os acromiale.
- To explore the pathomechanics linking os acromiale to rotator cuff pathology.
Main Methods:
- Retrospective review of eight patients with rotator cuff tears and concurrent os acromiale.
- Radiographic delineation of the acromial lesion.
- Literature review for similar reported cases.
Main Results:
- A previously unreported association between rotator cuff tears and os acromiale was identified in eight patients.
- Abnormal motion at the fibrous union of the os acromiale is hypothesized to cause rotator cuff impingement.
- Six patients underwent surgical repair of the rotator cuff with removal of the os acromiale fragment.
Conclusions:
- Os acromiale may be an underrecognized factor contributing to rotator cuff tears.
- Surgical intervention involving removal of the os acromiale fragment may be beneficial in treating associated rotator cuff tears.