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Related Experiment Videos

Rotator cuff tears associated with os acromiale.

Thomas Dirk Boehm1, Olaf Rolf, Frank Martetschlaeger

  • 1Department of Orthopaedic Surgery, Koenig-Ludwig-Haus, University of Wuerzburg, Brettreichstrasse 11, DE-97074 Wuerzburg, Germany. dr.dirkboehm@web.de

Acta Orthopaedica
|August 16, 2005
PubMed
Summary

Os acromiale, an anatomical variant, occurs in 6.2% of patients with rotator cuff tears. Its presence does not appear to influence tear severity, suggesting it may not be a direct cause of rotator cuff tears.

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Area of Science:

  • Orthopedic Surgery
  • Anatomy
  • Radiology

Background:

  • Os acromiale is a rare anatomical variant with an approximate incidence of 8% in cadaver studies.
  • This study investigates the incidence and types of os acromiale specifically in patients diagnosed with rotator cuff tears.

Purpose of the Study:

  • To determine the prevalence of os acromiale in patients undergoing rotator cuff repair.
  • To analyze the types of os acromiale present and their relationship with rotator cuff tear characteristics.

Main Methods:

  • Retrospective analysis of 1000 consecutive patients with open rotator cuff repairs.
  • Assessment of operation notes and axillary radiographs to identify os acromiale presence and type.

Main Results:

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  • Os acromiale was identified in 6.2% (62/1000) of patients.
  • The majority were os meso-acromiale (57) and os pre-acromiale (5).
  • The average number of tendons involved in rotator cuff tears was similar in patients with and without os acromiale.

Conclusions:

  • Os acromiale is a co-occurring condition in patients with rotator cuff tears.
  • The prevalence is comparable to general population estimates, questioning its pathological role in tear causation.
  • Further research is needed to definitively establish the relationship between os acromiale and rotator cuff tears.