The authors investigated twelve cases of recurrent dislocation of the Shoulder for recent ten years. Among these cases, eleven cases were anterior dislocation and one case was posterior dislocation of the shoulder. Anterior dislocation were treated with bone block operation (Bristow-McMurray method: 6 cases and Oudard-Jinnaka method: 5 cases).
Posterior dislocation was treated with modified Boyd's method, that is to say, posterior transfer of the biceps long tendon, posterior bone block method and overlapping suture of the infraspinatus muscle.
The results of the treatment were satisfactory.