[2 cases of habitual bilateral posterior dislocation of the shoulder treated with glenoid osteotomy]. / Deux cas de luxation postérieure bilatérale habituelle de l'épaule traités par ostéotomie glénoïdienne.

In two cases of bilateral spontaneous posterior dislocation of the shoulder, the authors have detected an anomaly of orientation of the glenoid cavity. A technique of radiological examination which allows a study of the position of the joint surface relative to the acromion and the coracoid process is described. Osteotomy of the glenoid was completed by a posterior graft taken from the end of the acromion with satisfactory results in the two cases.