title: Detection of furcation involvement using periapical radiography and 2 cone-beam computed tomography imaging protocols with and without a metallic post: An animal study.
abstract: OBJECTIVE
  The purpose of this study was to assess the accuracy, sensitivity, and specificity of the diagnosis of incipient furcation involvement with periapical radiography (PR) and 2 cone-beam computed tomography (CBCT) imaging protocols, and to test metal artifact interference.
  
  
  METHODS
  Mandibular second molars in 10 macerated pig mandibles were divided into those that showed no furcation involvement and those with lesions in the furcation area. Exams using PR and 2 different CBCT imaging protocols were performed with and without a metallic post. Each image was analyzed twice by 2 observers who rated the absence or presence of furcation involvement according to a 5-point scale. Receiver operating characteristic (ROC) curves were used to evaluate the accuracy, sensitivity, and specificity of the observations.
  
  
  RESULTS
  The accuracy of the CBCT imaging protocols ranged from 67.5% to 82.5% in the images obtained with a metallic post and from 72.5% to 80% in those without a metallic post. The accuracy of PR ranged from 37.5% to 55% in the images with a metallic post and from 42.5% to 62.5% in those without a metallic post. The area under the ROC curve values for the CBCT imaging protocols ranged from 0.813 to 0.802, and for PR ranged from 0.503 to 0.448.
  
  
  CONCLUSIONS
  Both CBCT imaging protocols showed higher accuracy, sensitivity, and specificity than PR in the detection of incipient furcation involvement. Based on these results, CBCT may be considered a reliable tool for detecting incipient furcation involvement following a clinical periodontal exam, even in the presence of a metallic post.
authors.affiliation: Department of Stomatology, School of Dentistry, University of São Paulo, São Paulo, Brazil.
authors.forename: Fernanda Cristina Sales
authors.initials: FC
authors.lastname: Salineiro
authors.affiliation: Department of Stomatology, School of Dentistry, University of São Paulo, São Paulo, Brazil.
authors.forename: Ivan Onone
authors.initials: IO
authors.lastname: Gialain
authors.affiliation: Department of Stomatology, School of Dentistry, University of São Paulo, São Paulo, Brazil.
authors.forename: Solange
authors.initials: S
authors.lastname: Kobayashi-Velasco
authors.affiliation: Department of Stomatology, School of Dentistry, University of São Paulo, São Paulo, Brazil.
authors.forename: Claudio Mendes
authors.initials: CM
authors.lastname: Pannuti
authors.affiliation: Department of Stomatology, School of Dentistry, University of São Paulo, São Paulo, Brazil.
authors.forename: Marcelo Gusmão Paraiso
authors.initials: MG
authors.lastname: Cavalcanti
keywords: Cone-Beam Computed Tomography; Diagnosis; Furcation Defects; Radiography, Dental