title: Criteria and limitations for selecting a sagittal split ramus osteotomy for patients with skeletal mandibular prognathism and open bite.
abstract: OBJECTIVE
  The purpose of this study is to elucidate the criteria and limitations for selecting a sagittal split ramus osteotomy (SSRO) alone for patients with skeletal mandibular prognathism and open bite.
  
  
  METHODS
  The relationship between the mandibular relapse after 1 year and the extent of vertical movement following SSRO alone was investigated for patients with skeletal mandibular prognathism and open bite and the criteria were determined.
  
  
  RESULTS
  The limitation in SSRO alone was found to be 3-mm vertical movement at the gonion. There was a significant difference in the mandibular relapse between the patients with >3-mm change and <3-mm change.
  
  
  CONCLUSIONS
  For patients with skeletal mandibular prognathism and open bite, if the vertical movement at the gonion is <3 mm, SSRO alone could be an effective treatment. However, if the movement is >3 mm, SSRO alone should be avoided and bimaxillary osteotomies may be a preferable treatment.
authors.affiliation: Division of Oral and Maxillofacial Surgery, Department of Sensory and Motor Organs, Faculty of Medicine, Miyazaki University, Miyazaki, Japan.
authors.forename: Izumi
authors.initials: I
authors.lastname: Yoshioka
authors.forename: Tatsurou
authors.initials: T
authors.lastname: Tanaka
authors.forename: Manabu
authors.initials: M
authors.lastname: Habu
authors.forename: Masafumi
authors.initials: M
authors.lastname: Oda
authors.forename: Masaaki
authors.initials: M
authors.lastname: Kodama
authors.forename: Shinya
authors.initials: S
authors.lastname: Kokuryo
authors.forename: Shinji
authors.initials: S
authors.lastname: Kito
authors.forename: Nao
authors.initials: N
authors.lastname: Wakasugi-Sato
authors.forename: Shinobu
authors.initials: S
authors.lastname: Matsumoto-Takeda
authors.forename: Yuji
authors.initials: Y
authors.lastname: Seta
authors.forename: Yuki
authors.initials: Y
authors.lastname: Fukudome
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Tominaga
authors.forename: Sumio
authors.initials: S
authors.lastname: Sakoda
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Morimoto
mesh_terms: D000328:Adult; D002508:Cephalometry / Q000379:methods; D002680:Chin / Q000473:pathology; D003657:Decision Making; D005260:Female; D006801:Humans; D008297:Male; D008334:Mandible / Q000473:pathology / Q000601:surgery*; D008437:Maxilla / Q000601:surgery; D024343:Open Bite / Q000601:surgery*; D019340:Osteotomy, Le Fort / Q000379:methods; D059229:Osteotomy, Sagittal Split Ramus / Q000379:methods*; D010347:Patient Care Planning; D011378:Prognathism / Q000601:surgery*; D012008:Recurrence; D012680:Sensitivity and Specificity; D016037:Single-Blind Method; D014716:Vertical Dimension; D055815:Young Adult