title: [Mandibular-driven simultaneous maxillo-mandibular distraction for hemifacial microsomia with rapid prototyping technology].
abstract: OBJECTIVE
  To explore the clinical application of mandibular-driven simultaneous maxillo-mandihular distraction to correct hemifacial microsomia with rapid prototyping technology.
  
  
  METHODS
  The patient' s skull resin model was manufactured with rapid prototyping technology. The osteotomy was designed on skull resin model. According to the preoperative design, the patients underwent Le Fort I osteotomy and mandibular ramus osteotomy. The internal mandible distractor was embedded onto the osteotomy position. The occlusal titanium pin was implanted. Distraction were carried out by mandibular-driven simultaneous maxillo-mandihular distraction 5 days after operation.
  
  
  RESULTS
  The distraction in five patients was complete as designed. No infection and dysosteogenesis happened. The longest distance of distraction was 28 mm, and the shortest distance was 16 mm. The facial asymmetry deformity was significantly improved at the end of distraction. The ocelusal plane of patients obviously improved.
  
  
  CONCLUSIONS
  Rapid prototyping technology is helpful to design precisely osteotomy before operation. Mandibular-driven simultaneous maxillo-mandibular distraction can correct hemifacial microsomia. It is worth to clinical application.
authors.forename: Quan-Wen
authors.initials: QW
authors.lastname: Gao
authors.forename: Hui-Feng
authors.initials: HF
authors.lastname: Song
authors.forename: Ming-Huo
authors.initials: MH
authors.lastname: Xu
authors.forename: Chun-Ming
authors.initials: CM
authors.lastname: Liu
authors.forename: Jia-Ke
authors.initials: JK
authors.lastname: Chai
mesh_terms: D005145:Face / Q000002:abnormalities* / Q000601:surgery; D005146:Facial Asymmetry / Q000151:congenital* / Q000601:surgery; D006053:Goldenhar Syndrome / Q000601:surgery*; D006801:Humans; D006965:Hyperplasia / Q000601:surgery*; D008334:Mandible / Q000601:surgery*; D008437:Maxilla / Q000601:surgery*; D019857:Osteogenesis, Distraction / Q000379:methods*; D010027:Osteotomy / Q000379:methods*; D019340:Osteotomy, Le Fort