Acromial morphology and morphometry associated with subacromial impingement syndrome

Area of Science:

• Orthopedics
• Anatomy
• Radiology

Background:

• Subacromial impingement syndrome is a leading cause of chronic shoulder pain.
• The acromion's morphology is a key factor in impingement syndrome development.

Purpose of the Study:

• To investigate acromion morphometry.
• To identify risk groups for subacromial impingement syndrome based on acromial features.

Main Methods:

• Analysis of 392 scapulae from individuals aged 31-90.
• Assessment of acromion type, osteophytes, and various acromial parameters.
• Statistical analysis of relationships between morphometry, age, sex, and side.

Main Results:

• Curved acromion was most prevalent; hooked acromion increased with age (over 41) and was more common in males.
• Acromial osteophytes were most frequent on the anteroinferior surface and increased with age.
• Acromion type correlated with anteroinferior osteophytes; acromial thickness differed between age groups (31-50 vs. 51-90).

Conclusions:

• Individuals over 50, and males over 40 with chronic shoulder pain, should be evaluated for subacromial impingement syndrome.
• Hooked acromion and osteophytes are significant contributors to impingement syndrome.
• Surgical intervention may be recommended for these morphological issues.