Glenoid version and inclination are risk factors for anterior shoulder dislocation

Hohmann, Erik and Tetsworth, Kevin (2015) Glenoid version and inclination are risk factors for anterior shoulder dislocation. Journal of Shoulder and Elbow Surgery, 24 8: 1268-1273. doi:10.1016/j.jse.2015.03.032

Author Hohmann, Erik
Tetsworth, Kevin
Title Glenoid version and inclination are risk factors for anterior shoulder dislocation
Journal name Journal of Shoulder and Elbow Surgery   Check publisher's open access policy
ISSN 1532-6500
Publication date 2015-08
Year available 2015
Sub-type Article (original research)
DOI 10.1016/j.jse.2015.03.032
Open Access Status Not yet assessed
Volume 24
Issue 8
Start page 1268
End page 1273
Total pages 6
Place of publication Philadelphia, United States
Publisher Mosby
Collection year 2016
Language eng
Formatted abstract
Hypothesis: Although the contribution of the capsuloligamentous structures and dynamic muscle balance to shoulder stability has been well documented, the role of the osseous anatomy of the glenoid has not been thoroughly evaluated. This study investigated glenoid version and inclination in patients with a documented anterior shoulder dislocation and compared it with a control group. We hypothesized that patients with a prior anterior dislocation would have more anterior version and increased inferior inclination of the glenoid.

Materials and methods: Patients aged younger than 40 years who underwent arthroscopic shoulder stabilization (study group) were compared with patients (control group) who had previously undergone magnetic resonance imaging (MRI) for a different shoulder condition. Version was measured on axial images, and inclination was measured on coronal images of a T2-weighted spin-echo scan. The MRIs of 128 study group patients (mean age, 24.5 ± 8.6 years) with a confirmed traumatic anterior shoulder dislocation were compared with the MRIs of 130 control group patients (mean age, 30.9 ± 7 years).

Results: The mean version in the study group was −1.7° ± 4.5° (retroversion); the mean inclination was 1.6° ± 5.9° (inferior). The mean version in the control group was −5.8° ± 4.6° (retroversion); the mean inclination was −4.0° ± 6.8° (superior). The between-group differences were significant for version (P = .00001) and inclination (P = .00001).

Conclusions: The results of this study strongly suggest that glenoid version and inclination are significantly increased in patients with established anterior shoulder instability compared with a matched control group.
Keyword Anterior shoulder dislocation
Glenoid version
Glenoid inclination
Risk factor
Glenohumeral subluxation
Shoulder injury
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2016 Collection
School of Medicine Publications
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