title: [Development and study of three-dimensional CT scanning system for dental cast measurement and analysis].
abstract: OBJECTIVE
  To develop a computer assisted CT scanning system for 3D dental cast measurement and to study its reliability.
  
  
  METHODS
  20 dental stone casts were scanned by helical CT and captured a series digital sliced radiographs of them. The program which was developed by Visual C 6.0 language and run under the Windows surroundings rebuilt the 3D graphics and measured the coordinate of the dental cast. These dental casts were scanned and measured to test the reliability of the system, contrasting with manual measurement.
  
  
  RESULTS
  There was no significant difference between 3D CT scanning and manual measurement (P > 0.05).
  
  
  CONCLUSIONS
  The system is a valuable computer assisted system for clinical diagnosis and treatment of malocclusion.
authors.affiliation: Dept. of Orthodontics, Affiliated Stomatological Hospital, Nanjing Medical University, Nanjing 210029, China.
authors.forename: Bin
authors.initials: B
authors.lastname: Yan
authors.forename: Lin
authors.initials: L
authors.lastname: Wang
authors.forename: Qiu-Sheng
authors.initials: QS
authors.lastname: Hu
authors.forename: Lin
authors.initials: L
authors.lastname: Pan
authors.forename: Kui
authors.initials: K
authors.lastname: Yang
authors.forename: Xu-Dong
authors.initials: XD
authors.lastname: Bao
mesh_terms: D006801:Humans; D007091:Image Processing, Computer-Assisted; D021621:Imaging, Three-Dimensional; D008310:Malocclusion; D003765:Models, Dental; D015203:Reproducibility of Results