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Relation between adhesive capsulitis and acromial morphology.

David P Richards1, Alexander I Glogau, Michael Schwartz

  • 1San Antonio Orthopaedic Group, San Antonio, Texas, USA. scopedr@cox.net

Arthroscopy : the Journal of Arthroscopic & Related Surgery : Official Publication of the Arthroscopy Association of North America and the International Arthroscopy Association
|July 9, 2004
PubMed
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This study found no link between primary adhesive capsulitis and acromial morphology. Acromial shape does not appear to cause this shoulder condition.

Area of Science:

  • Orthopedics
  • Radiology
  • Shoulder Surgery

Background:

  • Adhesive capsulitis, or 'frozen shoulder,' is a common condition causing shoulder stiffness and pain.
  • Acromial morphology, specifically the shape of the acromion bone, has been investigated as a potential contributing factor.

Purpose of the Study:

  • To investigate the potential association between primary adhesive capsulitis and different types of acromial morphology.
  • To determine if specific acromial shapes are more prevalent in patients with adhesive capsulitis compared to a control group.

Main Methods:

  • A case control study was conducted involving 100 patients diagnosed with adhesive capsulitis and a control group of 53 patients.
  • Retrospective chart review and analysis of supraspinatus outlet radiographs to assess acromial morphology (Type I, II, or III).

Related Experiment Videos

  • Range of motion and impingement signs were documented for all participants.

    • Main Results:

    • The predominant acromial morphology in both the adhesive capsulitis group (75.4%) and the control group (74.1%) was Type II.
    • While statistically significant differences in acromial types were found within each group, no significant difference was observed when comparing the adhesive capsulitis group to the control group.
    • Average range of motion measurements were recorded for both groups.

    Conclusions:

    • The study found no statistically significant difference in acromial morphology between patients with primary adhesive capsulitis and the control group.
    • The findings suggest that intrinsic trauma from subacromial space narrowing due to anterior acromial shape is unlikely to be the cause of primary adhesive capsulitis.