title: [Reliability of an improved measurement system used in three-dimensional reconstruction of stomatognathic system by cutting and scanning layer-by-layer].
abstract: OBJECTIVE
  To reconstruct 3D shape of edentulous jaw by using improved measurement system and to analyze the precision of this method.
  
  
  METHODS
  Standard edentulous jaw models were measured with a improved measurement system by cutting and scanning layer-by-layer, and the 3D shape of the models was reconstructed by image processing with specialty software. Ten cubic plaster modes were reconstructed by the same way, data of every border before and after reconstruction were measured and analyzed.
  
  
  RESULTS
  Data of edentulous jaw models were obtained. The errors in ten cubic before and after reconstruction were not significantly different (P > 0.05), data measured in horizontal plane were not significantly different (P > 0.05), and data measured in altitude direction were significantly different (P < 0.01), data measured after reconstruction were less than before, the error was (0.09 +/- 0.08) mm.
  
  
  CONCLUSIONS
  The improved cutting and scanning measurement system can be fit for the 3D reconstruction of stomatognathic system with high precision.
authors.affiliation: Dept of Prosthodontics, College of Stomatology, The Fourth Military Medical University, Xi'an, China.
authors.forename: Bo
authors.initials: B
authors.lastname: Gao
authors.forename: Xiao-bo
authors.initials: XB
authors.lastname: Wang
authors.forename: Yue-ling
authors.initials: YL
authors.lastname: Yao
authors.forename: Shao-hai
authors.initials: SH
authors.lastname: Wang
authors.forename: Jian
authors.initials: J
authors.lastname: Cao
mesh_terms: D006801:Humans; D007091:Image Processing, Computer-Assisted; D021621:Imaging, Three-Dimensional; D007575:Jaw, Edentulous; D015203:Reproducibility of Results; D012984:Software; D013284:Stomatognathic System; D014057:Tomography, X-Ray Computed