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Glenoid version and recurrent anterior shoulder dislocation: a case-control study
Yusuf Altuntas1, Ismail Tugay Yagci2, Enver Ipek3
1Department of Orthopedics and Traumatology, University of Health Sciences, Sisli Hamidiye Etfal Training and Research Hospital, Istanbul, Turkey. dryusufaltuntas@gmail.com.
BMC Musculoskeletal Disorders
|February 9, 2026
Summary
Increased anterior glenoid version is linked to recurrent shoulder instability. This finding suggests glenoid version may help predict instability risk in patients.
Area of Science:
- Orthopedics
- Radiology
- Biomechanics
Background:
- Glenoid version's role in anterior shoulder instability is debated.
- Previous studies show conflicting results regarding its association with instability.
Purpose of the Study:
- To investigate if CT-measured glenoid version varies with different lesion patterns.
- To determine if increased glenoid anteversion correlates with recurrent anterior shoulder dislocations.
Main Methods:
- Retrospective case-control study of 214 patients with anterior shoulder instability and 104 controls.
- Standardized axial CT scans used for glenoid version measurement (Friedman method).
- Analysis of lesion patterns (isolated Bankart vs. Bankart + Hill-Sachs) and correlation with dislocation frequency.
Main Results:
- Significant differences in glenoid version were found across groups (p < 0.001).
- Recurrent dislocations showed greater glenoid anteversion (0.47°) compared to single events (-5.30°).
- Strong positive correlation (r=0.654, p<0.001) between dislocation number and glenoid version.
Conclusions:
- Elevated anterior glenoid version is significantly associated with recurrent anterior shoulder instability.
- Glenoid version may serve as an additional parameter for clinical risk stratification in shoulder instability.
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