title: [Application of the cone beam computed tomography (CBCT) in Le Fort I osteotomy].
abstract: OBJECTIVE
  To improve the accuracy and safety of the Le Fort I osteotomy.
  
  
  METHODS
  Eighty-four patients underwent CBCT scan before maxillary orthognathic surgery. The anatomic structures of maxilla were marked and measured.
  
  
  RESULTS
  In 84 cases, there were 3 cases with severe hypoplasia of maxillary sinus, 11 cases with impacted third molar, 8 cases with separation in maxillary sinus, 4 cases with the deviation of nasal septum, and 3 cases with cysts in maxillary sinus. Form CBCT images, the position of the pterygopalatine canal, the thickness of maxillary wall, hidden lesion of maxillary sinus, the location of Impacted molar, the deviation of nasal septum, and other anatomic structure could be accurately localized. CBCT could provide sufficient and valuable information in diagnosis and design for Le Fort I osteotomy.
  
  
  CONCLUSIONS
  CBCT imaging technology could provide precise anatomic images for Le Fort I osteotomy. It improves the accuracy and safety of the Le Fort I osteotomy.
authors.affiliation: Department of Orthognathic Surgery, Stomatological Hospital Affiliated to Nankai University, Tianjin Stomatological Hospital, Tianjin 300041, China. houmin8181@sina.com
authors.forename: Min
authors.initials: M
authors.lastname: Hou
authors.forename: Lan-cheng
authors.initials: LC
authors.lastname: Zhang
authors.forename: Xi-zhong
authors.initials: XZ
authors.lastname: Zhang
authors.forename: Da-li
authors.initials: DL
authors.lastname: Song
authors.forename: Qing-xiang
authors.initials: QX
authors.lastname: Du
authors.forename: Chun-ming
authors.initials: CM
authors.lastname: Liu
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D019340:Osteotomy, Le Fort / Q000379:methods*; D014057:Tomography, X-Ray Computed / Q000379:methods*; D055815:Young Adult