title: [APPLICATION OF THREE-DIMENSIONAL CEPHALOMETRIC ANALYSIS IN ORTHOGNATHIC SURGERY].
abstract: OBJECTIVE
  To establish a model of three-dimensional (3-D) cephalometric analysis to study dentomaxillofacial deformities.
  
  
  METHODS
  Between January 2012 and October 2013, 15 patients with dentomaxillofacial deformities were treated using 3-D cephalometric analysis in orthognathic surgery plan. There were 7 males and 8 females with an average age of 23.6 years (range, 17-37 years), including 4 cases of mandibular protrusion with maxillary deficiency, 4 cases of maxillary protrusion with mandibular deficiency, 2 cases of long face syndrome, and 5 cases of facial asymmetry. CT images were reconstructed by Mimics software. The anatomical landmarks were located, the reference planes and analysis planes were defined and the 3-D coordinate was established. The distance and degree between landmarks and analysis planes which defined in the measure project were measured.
  
  
  RESULTS
  Based on the 3-D CT quantitative analysis methods, cephalometric analysis project was defined in the 3-D coordinate. 3-D cephalometric analysis provided a convenient and precise method for the clinical measurement of dentomaxillofacial morphology, and reduce the time in preoperation analysis.
  
  
  CONCLUSIONS
  The model of 3-D CT cephalometric analysis can provide precise information in the diagnosis and treatment planning of orthognathic surgery.
authors.forename: Ruichen
authors.initials: R
authors.lastname: Wang
authors.forename: Guizhen
authors.initials: G
authors.lastname: Li
authors.forename: Chunming
authors.initials: C
authors.lastname: Liu
authors.forename: Chiyu
authors.initials: C
authors.lastname: Jia
mesh_terms: D000293:Adolescent; D000328:Adult; D002508:Cephalometry / Q000379:methods*; D005260:Female; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008297:Male; D008334:Mandible / Q000000981:diagnostic imaging; D008437:Maxilla / Q000000981:diagnostic imaging; D008953:Models, Anatomic; D009971:Orthodontics, Corrective; D057909:Orthognathic Surgery; D018640:Stomatognathic System Abnormalities / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed / Q000379:methods; D055815:Young Adult