title: [Preliminary study on orthodontic treatment before and after distraction osteogenesis].
abstract: OBJECTIVE
  To get some guidelines for the orthodontic treatment before and after distraction osteogenesis (DO).
  
  
  METHODS
  DO was performed in 4 patients maxilla and two for mandible. The patients were aged from 19 to 25 (average 21.5). We try to sum up the procedures and clinical experiences of pre- and post-surgery orthodontics.
  
  
  RESULTS
  The procedures and experiences obtained are the followings: 1. Pre-surgery orthodontics for DO is simplified as alignment of dental arch in a short period. 2. Post-surgery orthodontics for DO is more complicated and peculiar. The main task is to make the opened posterior teeth occlude as soon as possible by light force vertical elastics. At the same time, some cross elastics may be needed for correction of posterior occlusal relationship. 3. Expansion of upper arch may be needed in some patients because of constricted dental arch. 4. Class II or III elastics may be used for prevention of relapse after DO.
  
  
  CONCLUSIONS
  DO is a new technique in orthognathic surgery. Post-surgery orthodontics is more complicated and important in the treatment course.
authors.affiliation: Department of Orthodontics, Peking University School of Stomatology, Beijing 100081, China.
authors.forename: Y
authors.initials: Y
authors.lastname: Zhou
authors.forename: M
authors.initials: M
authors.lastname: Fu
authors.forename: X
authors.initials: X
authors.lastname: Wang
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D009971:Orthodontics, Corrective; D019857:Osteogenesis, Distraction