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Internal impingement in the shoulder.

G Edelson1, C Teitz

  • 1Department of Orthopaedics, Poriya Government Hospital, Tiberias.

Journal of Shoulder and Elbow Surgery
|September 9, 2000
PubMed
Summary
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Rotator cuff impingement may stem from internal glenoid and humeral head contact, not just the acromion. This finding challenges the common rationale for acromioplasty surgery.

Area of Science:

  • Orthopedic Surgery
  • Anatomy
  • Biomechanics

Background:

  • The acromion is traditionally considered a primary cause of rotator cuff impingement.
  • Acromioplasty is a common surgical procedure for shoulder impingement.

Purpose of the Study:

  • To investigate alternative mechanisms in rotator cuff pathosis.
  • To evaluate the role of internal glenohumeral impingement.

Main Methods:

  • Examination of 1232 skeletal shoulder specimens.
  • Analysis of bone patterns indicative of joint impingement.

Main Results:

  • Identified characteristic bone patterns suggesting internal impingement between the glenoid and humeral head.
  • Evidence suggests internal impingement is a significant factor in rotator cuff disease.

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Conclusions:

  • The acromion's role in rotator cuff impingement may be overestimated.
  • Internal impingement presents a significant mechanism for rotator cuff pathosis.
  • The necessity of acromioplasty may require re-evaluation based on these findings.