title: Diagnosis of simulated external root resorption using conventional intraoral film radiography, CCD, PSP, and CBCT: a comparison study.
abstract: BACKGROUND
  Diagnosis of external root resorption (ERR) cavities may be challenging, especially when no clinical signs are seen. Therefore, the aim of this study was to compare the efficacy of conventional intraoral film radiography, charge-coupled device (CCD) detector, photostimulable phosphor plate (PSP) detector, and cone beam computed tomography (CBCT) for the detection of ERR.
  
  
  METHODS
  The study sample comprised 54 maxillary first premolars. Cavities were created by using a low-speed handpiece with round diamond burs of 1 mm in diameter. Digital and conventional radiographs were taken from each tooth. Three observers examined all images for the presence of resorption cavities. Data were statistically analyzed with the χ(2) test. The reliability and degrees of agreement were also determined by the mean of Cohen's Kappa analysis.
  
  
  RESULTS
  The differences between the imaging methods in correct detection of root resorption for all sizes were not significant. For locations of root resorption, significant differences were found between CBCT and other methods in the apical regions.
  
  
  CONCLUSIONS
  CBCT was only useful for detection of cavities located in the apical one-third of the root, compared to other digital or conventional methods.
authors.affiliation: Department of Oral and Maxillofacial Radiology, Dental School, Hamadan University of Medical Sciences, Hamadan, Iran.
authors.forename: Abbas
authors.initials: A
authors.lastname: Shokri
authors.forename: Hamed
authors.initials: H
authors.lastname: Mortazavi
authors.forename: Fatemeh
authors.initials: F
authors.lastname: Salemi
authors.forename: Adineh
authors.initials: A
authors.lastname: Javadian
authors.forename: Hamidreza
authors.initials: H
authors.lastname: Bakhtiari
authors.forename: Hooman
authors.initials: H
authors.lastname: Matlabi
mesh_terms: D054893:Cone-Beam Computed Tomography / Q000379:methods; D006801:Humans; D019252:Radiography, Dental, Digital / Q000295:instrumentation / Q000379:methods; D015203:Reproducibility of Results; D012391:Root Resorption / Q000000981:diagnostic imaging / Q000473:pathology*; D014092:Tooth Root / Q000000981:diagnostic imaging / Q000473:pathology*