Thirty-six shoulders with recurrent anterior dislocation or subluxation in thirty-four adolescent patients were treated with a modified Bristow procedure. The average length of follow-up was five years and ten months. Postoperatively, two patients had recurrent anterior subluxation on one occasion and none had recurrent anterior dislocation. The average loss of external rotation was 10 degrees. Despite the fact that young patients have a high rate of recurrence after anterior dislocation or subluxation of the shoulder, the modified Bristow procedure is an effective method of treating recurrent anterior instability of the shoulder in adolescents.