title: [Quantitative evaluation for the accuracy of dental model three-dimensional scanner].
abstract: OBJECTIVE
  To establish a method to evaluate dental model three-dimensional scanner quantitatively, and to evaluate the accuracy which is a core indicator of 3Shape D700 scanner.
  
  
  METHODS
  A standard geometric model similar to the dental arch was designed by three-dimensional reverse software and processed by high precision CNC (computer numerical control) processing technology. Core indicators of dental model three-dimensional scanner including single scanning accuracy, space consistency and rescan accuracy were evaluated.
  
  
  RESULTS
  The result of single scanning accuracy of 3Shape D700 scanner was (15.00±10.84) μm, and there was no statistics difference between the accuracy given by manufacturer's instructions which is 20 μm (P=0.053), and same as the results of space consistency (compare the accuracy in vertical direction and horizontal direction, P=0.524) and rescan accuracy (compare the rescan accuracy in vertical direction, P=0.633, and in horizontal direction P=0.221).
  
  
  CONCLUSIONS
  It is feasible to evaluate accuracy of dental model three-dimensional scanner by this method, which can avoid observer error caused by selecting points manually.
authors: Peking University School, Beijing, China.
authors: Yang
authors: Y
authors: Song
authors: Yu-chun
authors: YC
authors: Sun
authors: Yi-jiao
authors: YJ
authors: Zhao
authors: Yong
authors: Y
authors: Wang
authors: Pei-jun
authors: PJ
authors: Lv
mesh_terms: D002508:Cephalometry / Q000706:statistics & numerical data; D003724:Dental Arch / Q000033:anatomy & histology; D003779:Denture Design / Q000379:methods; D061827:Dimensional Measurement Accuracy; D006801:Humans; D007091:Image Processing, Computer-Assisted; D021621:Imaging, Three-Dimensional; D003765:Models, Dental / Q000706:statistics & numerical data*; D015898:Tomography Scanners, X-Ray Computed