[Facial asymmetry due to hemi-mandibular hypertrophy].

A relatively frequent disorder, hemi-mandibular hypertrophy is today well identified clinically and radiologically. Its expression varies from one case to another but it becomes stabilized at the end of growth. Its etiology is unclear and it can only be corrected surgically: the habitual inclination of the plane of occlusion leads to a bimaxillary action with a tridimensional effect. The results of these osteotomies performed at the same time is stable and dramatic. Although isolated osteotomy of the basilar excess has become a last resort procedure, isolated condylectomy is still an acceptable compromise in toothless patients. The diagnostic approach and result of surgical treatment are analyzed in light of a homogeneous series of 12 cases.