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Trauma

NATURAL HISTORY OF PRIMARY ANTERIOR GLENOHUMERAL JOINT DISLOCATION IN ADOLESCENT PATIENTS

Scottish Committee for Orthopaedics and Trauma (SCOT)



Abstract

The natural history of primary anterior glenohumeral dislocation in adolescent patients remains unclear and no consensus exists for management of these patients. The study objectives were to report the natural history following primary anterior glenohumeral joint dislocation in adolescent patients and to identify risk factors for repeat dislocation.

We reviewed prospectively-collected clinical and radiological data of 133 adolescent patients (mean age 16.3 years (range 13–18); 115 male patients (86.5%)) diagnosed with primary anterior glenohumeral joint dislocation and managed nonoperatively from 1996 to 2008 at our institution (mean follow-up 95.2 months (range 1–215)).

During follow-up, 102 (absolute incidence of 76.7%) patients experienced repeat dislocation. Median time interval between primary and repeat dislocation was 10 months (CI: 7.4 – 12.6). On survival analysis, 59% (CI: 51.2 – 66.8%) of patients remained stable one year following initial injury, 38% (CI: 30.2 – 45.8%) after two years, 21% (CI: 13.2- 28.8%) after five years, and 7% (CI: 1.1–12.9%) after 10 years. Neither age nor gender significantly predicted repeat dislocation during follow-up.

In conclusion, adolescent patients with primary anterior glenohumeral joint dislocations have a high rate of repeat dislocation, which usually occurs within two years of initial injury, and these patients should be considered early for operative stabilisation.