Article

[Distraction osteogenesis of the mandibular ramus in hemifacial microsomia].

Peking University School of Stomatology, Beijing 100081, China.
Zhonghua zheng xing wai ke za zhi = Zhonghua zhengxing waike zazhi = Chinese journal of plastic surgery 04/2009; 25(2):104-7. pp.104-7
Source: PubMed

ABSTRACT To study the application of distraction osteogenesis (DO) of the mandibular ramus in hemifacial microsomia.
From 1999 to 2006, 15 patients with hemifacial microsomia were treated with DO of the ramus, including 12 cases of children and juveniles, 3 cases of grown-ups. Maxillary Le Fort I osteotomy, unilateral sagittal split ramus osteotomy, genioplasty and free scapular flaps were selected to perform on the first or secondary stage of treatment.
Successful distraction was achieved in all patients with an average distraction distance of 21.25 mm. The distractor was removed after consolidation proved by clinical examination and X-ray. Facial appearance and and occlusal relationship were improved greatly. The occlusal plane was almost normal. There was no infection, malunion or permanent injury of inferior alveolar nerve.
DO of the ramus is very effective for the correction of severe hemifacial microsomia. It has much better therapeutic effect than traditional orthognathic procedures.

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Keywords

average distraction distance
 
clinical examination
 
distraction osteogenesis
 
hemifacial microsomia
 
inferior alveolar nerve
 
juveniles
 
malunion
 
mandibular ramus
 
Maxillary Le Fort
 
occlusal plane
 
occlusal relationship
 
secondary stage
 
severe hemifacial microsomia
 
Successful distraction
 
traditional orthognathic procedures
 
unilateral sagittal split ramus osteotomy