title: [Establishment and evaluation of a computer-based software system for detection of initial approximal caries].
abstract: OBJECTIVE
  To establish and evaluate a computer-based software system (caries diagnosing system, CDS): CDS for better detection of initial approximal caries based on the performance of radiography.
  
  
  METHODS
  A total of 190 approximal surfaces from 95 extracted posterior teeth were examined by bite-wing radiography. After analysing and extracting the approximal lesion's characteristics of X-ray performance, using Matlab and VC language, the CDS was established. Then the proximal surfaces of these teeth were detected automatically by CDS, and scored by naked eyes of 8 experienced dentists for the extent of lesions. The histological appearance of sectioned teeth was used as the gold standard to assess sensitivity, specificity, accuracy, and reproducibility.
  
  
  RESULTS
  The sensitivity of CDS was 0.728, Pearson's correlation was 0.722, better than that of optic estimation. The reproducibility of CDS was good too.
  
  
  CONCLUSIONS
  The CDS can report the lesion site and extension, its diagnostic level is better than that of optic estimation, it is an reasonably sensitive and accurate method for the detection of initial approximal caries in present clinic practice, and a tool of providing objective data.
authors.affiliation: Department of Operative and Endodontics, Faculty of Stomatology, Capital University of Medical Sciences, Beijing 100050, China. liyun-prc@263.net
authors.forename: Yun
authors.initials: Y
authors.lastname: Li
authors.forename: Wei-ping
authors.initials: WP
authors.lastname: Ye
authors.forename: Yu-jing
authors.initials: YJ
authors.lastname: Li
authors.forename: Yang
authors.initials: Y
authors.lastname: Yu
mesh_terms: D003731:Dental Caries / Q000000981:diagnostic imaging*; D001330:Electronic Data Processing; D006801:Humans; D066298:In Vitro Techniques; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods*; D016300:Radiography, Bitewing / Q000379:methods*; D012984:Software