• Maxillofacial Plastic and Reconstructive Surgery
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• v.11 no.2
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• pp.19-27
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• 1989

Hemifacial microsomia is characterized underdevelopment of the TMJ, mandibular ramus, and associated muscles of mastication. The Maxilla and malar bones on the affected side frequently are underdeveloped. The contiguous parotid gland may be hypoplastic. Preauricular sinus tracts and tags may exist, along with underdevelopment of the associated external ear, and affected facial nerve and muscles of facial expression may also show dysfunction. Children exhibiting the more classic signs will be identified at birth. Little is known about the etiology of hemifacial microsomia. We have corrected surgically a 22-year-old woman with hemifacial microsomia. We have performed leveling Le Fort I osteotomy with iliac bone graft on the maxilla, reverse-L osteotomy and iliac bone graft on the right mandibular ramus, vertical ramus osteotomy on the left side, onlay bone graft on the right mandibular body, and augmentation genioplasty. The postoperative course was uneventful and restoration of facial asymmetry was achieved.

• Journal of Yeungnam Medical Science
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• v.12 no.2
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• pp.393-399
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• 1995

Mandibular retrusion showing the facial problem with a marked maxillarry incisors protrusion and chin deficiency, resulting in a highly convex profile is uncommon in Korea.. The large incisor overjet and deep-bite create functional limitations and unpleasing esthetic result. The majority of theses cases are susceptible to correction by orthodontic therapeutic methods. But severe Class II retrognathic cases in which orthodontic treatment alone has not been capable of achieving good results. Orthognathic surgery offers several approaches. In this case, mandibular advancement by bilateral sagittal split ramus osteotomy and augmentation genioplasty has a special surgical problems. The suprahyoid muscle gorup are lengthened if the body of the mandible is surgically repositioned anteriorly. Instability of results and relapse return to original position shoud predicted during post-surgical muscular readjustment.. To maintain maximum correction with this technique, it is suggested that the mandibular body be well rotated forward at time of surgical intervention and overcorrected anteriory as much as possible. So, the authors report the case with review of concerned literature.