title: [Genioplasty with two-step osteotomy for severe microgenia].
abstract: OBJECTIVE
  To investigate a technique for correction of severe microgenia.
  
  
  METHODS
  The mandibular symphysis was exposed through intraoral mucous incision. Two parallel osteotomies were performed under mental foramen. The mobilized segments were advanced like two steps and fixed rigidly with miniplate.
  
  
  RESULTS
  From June, 2004 to Dec, 2005, 10 cases with severe microgenia were treated with this technique. The duration of follow-up was six months. The mean chin advancement was 1.1 cm and the mean chin vertical increase was 0.7 cm. All the patients healed very well with satisfactory aesthetic result.
  
  
  CONCLUSIONS
  With this two-step genioplasty, the chin can be moved to ideal position with a natural appearance. It is a reliable method for severe microgenia.
authors.affiliation: Department of Plastics and Burns, General Hospital of Beijing Military Region, Beijing 100700, China.
authors.forename: Jin-chao
authors.initials: JC
authors.lastname: Luo
authors.forename: Lai
authors.initials: L
authors.lastname: Gui
authors.forename: Zhi-yong
authors.initials: ZY
authors.lastname: Zhang
authors.forename: Li
authors.initials: L
authors.lastname: Teng
mesh_terms: D000328:Adult; D002680:Chin / Q000002:abnormalities* / Q000601:surgery*; D005260:Female; D006801:Humans; D008334:Mandible / Q000002:abnormalities / Q000601:surgery*; D010027:Osteotomy; D055815:Young Adult