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Shoulder posterior subluxation.

L A Norwood, G C Terry

    The American Journal of Sports Medicine
    |January 1, 1984
    PubMed
    Summary
    This summary is machine-generated.

    Opening wedge posterior scapular osteotomy effectively treats posterior shoulder instability from direct trauma or muscular contraction, enabling return to athletics. It is not recommended for congenitally lax shoulders.

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    Area of Science:

    • Orthopedic Surgery
    • Sports Medicine
    • Biomechanics

    Background:

    • Chronic recurrent posterior shoulder subluxation presents a challenge in restoring joint stability and athletic function.
    • Identifying the etiology of posterior instability is crucial for successful surgical outcomes.

    Purpose of the Study:

    • To evaluate the efficacy of opening wedge posterior scapular osteotomy and soft tissue procedures in managing chronic recurrent posterior shoulder subluxation.
    • To determine the impact of the surgical intervention on postoperative joint stability and the level of athletic participation.

    Main Methods:

    • Retrospective review of 21 patients undergoing opening wedge posterior scapular osteotomy.
    • Objective reevaluation of 19 patients at an average of 39.9 months post-surgery.

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  • Classification of instability based on injury mechanism (direct trauma, muscular contraction, congenital laxity).

    • Main Results:

    • Patients with instability due to direct trauma showed effective stabilization and return to athletics post-osteotomy.
    • Instability from muscular contraction required additional soft tissue procedures for optimal outcomes.
    • Congenitally or habitually lax shoulders did not achieve stability with this surgical approach.

    Conclusions:

    • Opening wedge posterior scapular osteotomy is indicated for single-plane posterior instability from direct trauma or muscular contraction, and combined anterior-posterior instability.
    • The procedure is contraindicated in congenitally or habitually lax shoulders.
    • A classification system based on injury force and direction aids in predicting glenohumeral joint stability and functional recovery.