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Changes in acromial morphology with age

J C Wang1, M S Shapiro

  • 1Department of Orthopaedic Surgery, UCLA Center for Health Sciences 90024, USA.

Journal of Shoulder and Elbow Surgery
|January 1, 1997
PubMed
Summary
This summary is machine-generated.

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Acromial morphology changes with age, with older individuals over 50 showing more type III and fewer type I acromions. This suggests acromial types may evolve over time, potentially linked to impingement.

Area of Science:

  • Orthopedics
  • Radiology
  • Anatomy

Background:

  • Acromial morphology is debated as either innate or degenerative.
  • The progression of acromial types over time remains unclear.

Purpose of the Study:

  • To investigate the incidence of acromial morphology types in relation to patient age.
  • To explore variations in acromial types based on the presence of shoulder impingement.

Main Methods:

  • Retrospective analysis of supraspinatus outlet radiographs from 272 patients.
  • Categorization of acromial morphology into types I, II, and III.
  • Correlation of acromial type incidence with patient age and clinical symptoms.

Main Results:

  • A significant increase in type III and decrease in type I acromions was observed in patients over 50 years old (p=0.046).

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  • In asymptomatic patients, this age-related shift was even more pronounced (p=0.004).
  • Acromial type incidence differed between symptomatic and asymptomatic groups.

    • Conclusions:

    • Acromial morphology incidence varies significantly with patient age and the presence of mechanical impingement.
    • Findings suggest a potential degenerative progression of acromial types from I to III over time.
    • This progression may be influenced by aging and shoulder impingement conditions.