[Distraction osteogenesis for correction of maxillo-mandibular deformity].
OBJECTIVE
To study the application of extraoral distraction devices in correction of various maxillo-mandibular deformities.


METHODS
From 1997, 11 cases with various maxillo-mandibular deformities were corrected by distraction devices of designed by myself. 7 cases of then were the patients with cleft palate who have severe secondary maxillary hypoplasia. 1 case with micrognathia, 1 case with partial mandibular mentum defect, 1 case with lateral deviation of micrognathia and 1 case with hemimandibular hypertrophy. The mandibles were elongated, from 12 mm to 20 mm, the maxillae were elongated from 7 mm to 22 mm, the vertical mandibular distraction was 15 mm.


RESULTS
All cases were corrected satisfactorily and haven't any complications. In 1 cases the 1 Kischners pin had been pull out by loosen during distration. 4 Kischners pin were curved during vertical mandibular distration. Another case the maxillary hypoplasia appeared edge-to-edge and mild open occlusion after 4 weeks fixation.


CONCLUSIONS
The extraoral distration osteogenesis provides a new method with many advantages for those maxillo-mandibular deformities that are difficulty corrected by ordinary orthognathic surgery.
Song
Ju-yu
JY
Department of Stomatology, Shenyang General Hospital, PLA, Shenyang 110016, China.
Zhang
Ye
Y
Chen
Zhi-hong
ZH
Zhang
Li
L
Bao
Hai-hong
HH
D002972:Cleft Palate / Q000628:therapy; D006801:Humans; D007569:Jaw Abnormalities / Q000628:therapy*; D008334:Mandible / Q000002:abnormalities; D008437:Maxilla / Q000002:abnormalities; D008844:Micrognathism / Q000628:therapy; D019857:Osteogenesis, Distraction / Q000295:instrumentation*; D016896:Treatment Outcome