title: Root canal system in the mesiobuccal root of the maxillary first molar: an in vitro comparison study of computed tomography and histology.
abstract: OBJECTIVE
  The purpose of this study was to investigate a new diagnostic approach to the examination of the canal configuration of the mesiobuccal root of the maxillary first molar.
  
  
  METHODS
  High-resolution computed tomography (CT) was compared with histology in vitro. There were 152 teeth investigated and classified according to Weine and Vertucci.
  
  
  RESULTS
  CT describes the exact canal configuration, verifying information identical to histology, and thus serving as the "gold standard" in vitro. With regard to canal position, 9 (5.92%) of the teeth examined were Vertucci type 1, 48 (31.58%) were Vertucci type 2, 91 (59.87%) were Vertucci type 4, 1 (0.66%) was Vertucci type 5, 1 (0.66%) was Vertucci type 6. Of the 152 teeth examined, 3 (1.97%) could not be classified using Weine, 2 (1.31%) could not be classified according to either Weine or Vertucci, and no Vertucci types 3, 7 or 8 were identified.
  
  
  CONCLUSIONS
  CT offers complete information on the number and configuration of root canals. As the root canal configuration of the adult does not change rapidly, CT investigations can be used for multiple subsequent treatments.
authors.affiliation: Dental School of Vienna, University of Vienna, Department for Conservative Dentistry, Waehringerstrasse 25a, A-1090 Vienna, Austria. andreas.eder@meduniwien.ac.at
authors.forename: A
authors.initials: A
authors.lastname: Eder
authors.forename: M
authors.initials: M
authors.lastname: Kantor
authors.forename: A
authors.initials: A
authors.lastname: Nell
authors.forename: T
authors.initials: T
authors.lastname: Moser
authors.forename: A
authors.initials: A
authors.lastname: Gahleitner
authors.forename: A
authors.initials: A
authors.lastname: Schedle
authors.forename: W
authors.initials: W
authors.lastname: Sperr
mesh_terms: D000328:Adult; D003786:Dental Pulp Cavity / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D006801:Humans; D008437:Maxilla; D008963:Molar / Q000033:anatomy & histology / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed; D014092:Tooth Root / Q000033:anatomy & histology / Q000000981:diagnostic imaging