McLaughlin technique for posterior dislocation of shoulder. A, Cross section of left shoulder viewed from above. B, Deformity in posterior dislocation with engagement of posterior glenoid rim in defect of anterior aspect of humeral head. C, Dislocation has been reduced, but instability remains; redislocation occurs with internal rotation, flexion, or adduction. Subscapularis has been divided. D, Stabilization by medial transposition of subscapularis insertion into defect. SEE TECHNIQUE 47.12.