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Os acromiale: anatomy and surgical implications

J G Edelson1, J Zuckerman, I Hershkovitz

  • 1Department of Orthopedic Surgery, Poriya Hospital, Tiberias, Israel.

The Journal of Bone and Joint Surgery. British Volume
|July 1, 1993
PubMed
Summary

Os acromiale, a bone fragment of the acromion, occurred in 8.2% of 270 scapular bones examined. This study details its characteristics and surgical treatment for symptomatic cases.

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Area of Science:

  • Orthopedic surgery
  • Anatomy

Background:

  • Os acromiale is an unfused ossification center of the acromion.
  • Its incidence and anatomical characteristics are not fully understood.

Purpose of the Study:

  • To determine the incidence and anatomical features of os acromiale.
  • To evaluate surgical outcomes for symptomatic os acromiale.

Main Methods:

  • Examination of 270 scapular bones.
  • Analysis of fragment size, involvement of the acromioclavicular facet, and coracoacromial ligament attachment.
  • Surgical intervention in symptomatic patients.

Main Results:

  • An 8.2% incidence of os acromiale was observed.
  • Fragments typically measured one-third of the acromion length.
  • Osteophytic lipping was present in two-thirds of specimens.
  • Six of seven surgically treated patients had good outcomes.

Conclusions:

  • Os acromiale is a relatively common finding with specific anatomical patterns.
  • Surgical management can yield favorable results for symptomatic individuals.

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