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Predicting the degree of anterior stability of the shoulder after traumatic anterior shoulder dislocation or subluxation in young highly active men

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Author(s): Yoshitaka Tanaka, Kenji Okamura,Tomohito Imai, Masatoshi Amakao, Ryuji Koga, Shigekazu Watanabe

Journal: Journal of Orthopaedics
ISSN 0972-978X

Volume: 6;
Issue: 3;
Date: 2009;
Original page

Keywords: Shoulder | Anterior translation | Dislocation | Young men | Computed tomographic arthrography | Arthroscopy

ABSTRACT
Purpose: The anterior drawer test is used to evaluate the degree of anterior translation of the shoulder. However, it is difficult to perform it, when the patient’s relaxation is not achieved. Thus, we evaluated the findings of arthroscopy and computed tomographic arthrography in young, highly active men with traumatic anterior shoulder dislocation or subluxation to determine the objective factors that can predict the degree of anterior translation regardless of the patient’s relaxation. Methods: A total of 65 patients 67 shoulders were enrolled in this study. On the basis of the degree of anterior translation of the shoulder, which was evaluated with the patients under anaesthesia, we divided the patients with limited shoulder movement into 2 groups: stable and unstable groups. There were 8 patients (8 shoulders) in the stable group and 57 patients (59 shoulders) in the unstable group. We compared the findings of arthroscopy and computed tomographic arthrography between the stable and unstable groups. Results: In the univariate analysis, capsular insertion type and condition of the anterior band of the inferior glenohumeral ligament were associated with excessive anterior translation (p < 0.001). However, logistic regression analysis revealed capsular insertion type to be the strongest factor of excessive anterior translation of the shoulder (p = 0.012). Conclusion: Evaluation of capsular insertion type on computed tomographic arthrography after shoulder subluxation or dislocation is a useful method to predict excessive anterior translation of the shoulder.
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