[Orthodontic and maxillofacial confrontation of a hemifacial microsomic mandible, comprising electromyographic check].

A rare case of hemifacial microsomia of the mandible whose etiological entity is delineated from the bad posture of the foetus in the womb during the foetal period, is described. In this case, the combination of orthodontic and maxillofacial treatment, gave satisfactory results as regards the aesthetic problem of the person, the occlusal disturbances and the function, of the masseter and the temporalis-muscles. These functions were checked before, during and after the treatment by means of electromyograms, and a more balanced activity of these muscles could be detected after the combined treatment.