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Updated: Feb 11, 2026

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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
PubMed
Summary

Increased anterior glenoid version is linked to recurrent shoulder instability. This finding suggests glenoid version may help predict instability risk in patients.

Keywords:
Bankart lesionGlenohumeral jointHill–Sachs lesionScapular anatomyShoulder dislocation

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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.