title: [A study of dental cast by using 3D laser non-contact measurement and analysis].
abstract: OBJECTIVE
  To research and develop a new scanning 3-D digitization system for noncontact measuring of dental cast.
  
  
  METHODS
  By using two pulsate motor to make the synthetic movement of the dental cast, a special semiconductor laser and two special line-array CCD, the 3D coordinate could be gotten from the surface of the dental cast in any where. The program which is developed by Visual C++ language and run under the Windows surroundings can control the scanner, rebuild the 3D graphics and measure the coordinate of the dental cast.
  
  
  RESULTS
  The system offers 70 mm x 70 mm x 70 mm measurement scope, 0.01 mm resoling power < 0.1 mm mean deviation, 25 mins for single cast scanning.
  
  
  CONCLUSIONS
  This system provides many advantages such as in precision, simplicity, high efficiency, and wide range of measurement contents with complete direct view. It also supplied us some new functions which can not be done with traditional way of measurement.
authors.affiliation: School of Stomatology, Beijing Medical University, Beijing 100081.
authors.forename: P
authors.initials: P
authors.lastname: Lu
authors.forename: Z
authors.initials: Z
authors.lastname: Li
authors.forename: Y
authors.initials: Y
authors.lastname: Wang
mesh_terms: D003735:Dental Casting Technique; D006801:Humans; D007091:Image Processing, Computer-Assisted; D021621:Imaging, Three-Dimensional; D007834:Lasers; D003765:Models, Dental; D015203:Reproducibility of Results