title: [Role of multislice spiral computed tomography in the evaluation of changes in upper airway volume during surgical treatment in patients with dentomaxillary abnormalities].
abstract: OBJECTIVE
  To assess the role of multislice spiral computed tomography in the calculation of upper airway volume and its change in patients with different types of dentomaxillary abnormalities after orthognathic surgery.
  
  
  METHODS
  Twenty-five patients with dentomaxillary abnormalities (19 and 6 patients with Classes III and II dentomaxillary abnormalities, respectively) were examined. All the patients underwent two-jaw operations. Facial skeleton computed tomography was performed before treatment initiation and 6 months after surgery. The DICOM data were loaded in Dolphin Imaging 11.5 and a special program package was applied to calculate the volume of air space in the upper airway. The hard tissue and soft tissue points used to construct the planes setting the detection limits of air space in the upper airway were determined.
  
  
  RESULTS
  After surgery, the patients with Class II dentomaxillary abnormalities display unilateral changes in our measured upper airway values (by increasing or reducing the air space); the majority of cases exhibiting higher values. Half of the patients with Class III had unilateral hanges, the increase or reduction in air space values varying in approximately equal proportions.
  
  
  CONCLUSIONS
  Computed tomography permits the calculation of upper airway volumes before and after orthognathic treatment in patients with dentomaxillary abnormalities, which is in its turn of significant scientific and practical interest.
authors.forename: G S
authors.initials: GS
authors.lastname: Gordina
authors.forename: N S
authors.initials: NS
authors.lastname: Serova
authors.forename: A Iu
authors.initials: AIu
authors.lastname: Drobyshev
authors.forename: A V
authors.initials: AV
authors.lastname: Glushko
mesh_terms: D000293:Adolescent; D000328:Adult; D006801:Humans; D007432:Intraoperative Period; D007569:Jaw Abnormalities / Q000000981:diagnostic imaging* / Q000601:surgery; D007830:Larynx / Q000000981:diagnostic imaging*; D008437:Maxilla / Q000002:abnormalities* / Q000000981:diagnostic imaging / Q000601:surgery; D008875:Middle Aged; D061330:Multidetector Computed Tomography / Q000379:methods*; D019647:Oral Surgical Procedures; D010614:Pharynx / Q000000981:diagnostic imaging*; D014071:Tooth Abnormalities / Q000000981:diagnostic imaging* / Q000601:surgery; D055815:Young Adult