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Morphometric analysis of the acromioclavicular joint
A Stecco1, E Sgambati, E Brizzi
1Department of Clinical Pathophysiology, Institute of Radiology: 1st Section of Radiodiagnostics, Florence.
Summary
The width of the acromioclavicular (AC) joint space shows no significant sex-based differences. While AC joint space may decrease with age, this change is not statistically significant across different age groups.
Area of Science:
- Orthopedics
- Radiology
- Anatomy
Background:
- The acromioclavicular (AC) joint is crucial for shoulder function.
- Understanding normal AC joint space width is important for diagnosing joint pathologies.
- Age and sex may influence AC joint morphology.
Purpose of the Study:
- To determine normal articular space width values for the AC joint.
- To investigate potential variations in AC joint space width related to age and sex.
Main Methods:
- Radiographic analysis of AC joints in 100 adults (72 males, 28 females; age 38-83).
- Semiautomatic computerized system used for precise measurement of articular space width.
- Bilateral measurements taken at the narrowest point between articular surfaces.
- Data analyzed using variance analysis, stratified by sex and age groups (<50, 50-59, 60-69, >70 years).
Main Results:
- No statistically significant differences in AC joint space width were observed between males and females.
- A trend of decreasing AC joint space width with increasing age was noted in both sexes.
- Differences in AC joint space width between the studied age groups did not reach statistical significance.
Conclusions:
- AC joint space width is not significantly influenced by sex.
- Age-related changes in AC joint space width, though present, are not statistically significant in this cohort.
- These findings contribute to establishing normative data for AC joint space width.