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The treatment of some disorders of the maxillo-mandibular apparatus. I. Congenital disorders.

— The present report is concerned with the diagnosis and treatment of four cases of complex disorders of the maxillo-mandibular apparatus with a strong congenital basis. In most cases osteoarthritis of the temporomandibular joint complex was superimposed on these congenital conditions and three out of four cases had open-bite. Treatment, in most cases, consisted of rapid maxillary expansion utilizing a removable appliance. In one case chrome-cobalt cast metal dentures were made to achieve a balanced occlusion. In cases of open-bite occlusal equilibration was performed so as to achieve an helicoidal occlusal plane.