title: Comparison of images from digital intraoral receptors and cone beam computed tomography scanning for detection of voids in root canal fillings: an in vitro study using micro-computed tomography as validation.
abstract: OBJECTIVE
  To compare the diagnostic value of six intraoral digital receptors and a cone beam computed tomography scanning system for detection of voids in root fillings.
  
  
  METHODS
  Sixty-seven root-filled roots with oval and ribbon-shaped canals were included. Three standardized radiographic examinations were performed for each root with six intraoral digital receptors. Further, the roots were examined using CBCT. Four observers measured the extension of voids in all images. The true extension of voids was recorded in cross-sectional images from micro-computed tomography scans (micro-CT). The proportion of voids observed in the radiographic image validated against micro-CT was calculated for each system.
  
  
  RESULTS
  All intraoral receptors underestimated the extension of voids, and few false positives were recorded. CBCT resulted in a higher proportion of correctly observed voids, but with several false-positive recordings.
  
  
  CONCLUSIONS
  The diagnostic value differed little among the six intraoral systems. CBCT overestimated in many cases the proportion of voids in root fillings.
authors.affiliation: Section for Dental Pathology, Operative Dentistry and Endodontics, Department of Dentistry, Health, Aarhus University, Denmark.
authors.forename: Line
authors.initials: L
authors.lastname: Møller
authors.forename: Ann
authors.initials: A
authors.lastname: Wenzel
authors.forename: Anne Mette
authors.initials: AM
authors.lastname: Wegge-Larsen
authors.forename: Ming
authors.initials: M
authors.lastname: Ding
authors.forename: Michael
authors.initials: M
authors.lastname: Væth
authors.forename: Edgar
authors.initials: E
authors.lastname: Hirsch
authors.forename: Lise-Lotte
authors.initials: LL
authors.lastname: Kirkevang
mesh_terms: D054893:Cone-Beam Computed Tomography / Q000379:methods*; D003786:Dental Pulp Cavity / Q000000981:diagnostic imaging*; D006801:Humans; D019252:Radiography, Dental, Digital / Q000379:methods*; D012389:Root Canal Obturation; D014057:Tomography, X-Ray Computed / Q000379:methods; D014092:Tooth Root / Q000000981:diagnostic imaging*