GENERALIZED LIGAMENT LAXITY IN 1ST TIME ANTERIOR SHOULDER DISLOCATION

Abstract

Introduction: This study was performed to assess the incidence of generalized ligament laxity in patients presented with 1st time anterior shoulder dislocation.

Patients and Methods: Prospective data was collected for patients presented with 1st time anterior shoulder dislocation and clavicle fracture as a control group between Aug 2008 and Feb 2009 under the care of a specialist shoulder surgeon. Data included demographic details, mechanism of injury and generalized ligament laxity using Beighton score. Laxity is scored on a 0–9 scale. Scores of 4 or above are indicative of generalized ligament laxity. Brighton criteria was used to diagnose Benign Joint Hypermobility Syndrome (BJHS)

Results: Data was collected for 44 patients with first time anterior shoulder dislocation and 43 patients with clavicle fracture. There was no difference in the demographics of the groups. There were 40 male (91%) and 4 (9%) female patients in the dislocation group. Mean age was 25 years with a range from 15–55. Most common cause of shoulder dislocation was sports related injuries in 26 patients (60%). The average Beighton score for dislocation group was 3.6 with a range from 0–9 as compared to 2.1 with a range from 0–7 in the control group. Twenty one patients (48%) in the dislocation group had a Beighton score of 4 or more indicating generalized ligament laxity as compared to 12 patients (28%) in the control group. This difference was statistically significant with a P value of 0.009. Six patients (14%) fulfilled the Brighton criteria for BJHS in the dislocation group as compared to 3 patients (7%) in the control group.

Conclusion: We found that there is a high incidence (48%) of generalized ligament laxity in patients presented with first time anterior shoulder dislocation. Appropriate advice should be given to these patients about rehabilitation, risk of recurrent dislocations and timing of shoulder stabilization.