title: The research and development of noncontact 3-D laser dental model measuring and analyzing system.
abstract: OBJECTIVE
  To research and develop a new laser scanning 3-dimensional digitization system for collecting, showing, and measuring the data of dental casts.
  
  
  METHODS
  According to the 3-dimensional measuring method, by using 2 pulsate motors to make the synthetic movement of the dental cast, a special semiconductor laser, and 2 special line array CCD, the 3-D data could be found anywhere on the surface of the dental cast. The program, developed with Visual C++ language under the Windows (Windows tm) system, can control the scanner, rebuild the 3-D graphics and measure the data of the dental cast.
  
  
  RESULTS
  The system offers 70 x 70 x 70 mm measurement scope, 0.01 mm resoling power, < 0.1 mm mean deviation, and 25 mins for single cast scanning.
  
  
  CONCLUSIONS
  The advantages of this system are its precision, simplicity, high efficiency, and wide range of measurements with complete direct view. This system also supplied new information that cannot be found with traditional measurement methods.
authors: Research Center of Engineering and Technology of Dental Computer, Ministry of Public Health, Beijing Medical University (BMU), No. 38 Baishiqiao Road, 10081, P. R. China.
authors: P
authors: P
authors: Lu
authors: Z
authors: Z
authors: Li
authors: Y
authors: Y
authors: Wang
authors: J
authors: J
authors: Chen
authors: J
authors: J
authors: Zhao
mesh_terms: D003196:Computer Graphics; D003626:Data Display; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000295:instrumentation / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods*; D007834:Lasers; D003765:Models, Dental; D015203:Reproducibility of Results; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation; D012984:Software; D013499:Surface Properties