title: Diagnostic accuracy of cone beam computed tomography sections with various thicknesses for detecting misfit between the tooth and restoration in metal-restored teeth.
abstract: OBJECTIVE
  To evaluate the diagnostic accuracy of cone beam computed tomography (CBCT) sections with various reconstruction thicknesses for detecting misfit between tooth and restoration in metal-restored teeth.
  
  
  METHODS
  Eighty teeth (perfect fit, 40 of these used with 0.2 mm gap, and 40 with 0.4 mm gap), were imaged with large FOV i-CAT. Images were reconstructed in five thicknesses: 0.2 (voxel size), 1, 2, 5, and 10 mm. Four examiners assessed the presence of gaps using a 5-point scale. Area under the receiver operating characteristics curve (aucROC) for misfit detection was calculated for each variable. A multivariate logistic regression was performed by using misfit detection accuracy as the dependent variable.
  
  
  RESULTS
  The score "cannot decide" decreased when the reconstruction thickness was increased. Mean aucROC ranged between 0.60 and 0.72. Logistic regression showed that the presence of a gap and reconstruction thickness had an impact on diagnostic accuracy.
  
  
  CONCLUSIONS
  Diagnostic accuracy of CBCT sections was low for detecting misfit in metal-restored teeth.
authors.affiliation: Oral Radiology, Department of Surgery and Orthopedics, School of Dentistry, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Brazil, and Section of Oral Radiology, Department of Dentistry, Aarhus University, Aarhus, Denmark. Electronic address: Gabiliedke@yahoo.com.br.
authors.forename: Gabriela Salatino
authors.initials: GS
authors.lastname: Liedke
authors.affiliation: PhD student, Oral Radiology, Section of Oral Radiology, Department of Dentistry, Aarhus University, Aarhus, Denmark.
authors.forename: Rubens
authors.initials: R
authors.lastname: Spin-Neto
authors.affiliation: Adjunct Professor, Department of Surgery and Orthopedics, School of Dentistry, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Brazil.
authors.forename: Mariana Boessio
authors.initials: MB
authors.lastname: Vizzotto
authors.affiliation: PhD student, Oral Radiology, Department of Surgery and Orthopedics, School of Dentistry, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Brazil.
authors.forename: Priscila Fernanda
authors.initials: PF
authors.lastname: da Silveira
authors.affiliation: Professor, Section of Oral Radiology, Department of Dentistry, Aarhus University, Aarhus, Denmark, and Institute of Odontology, Copenhagen University, Copenhagen, Denmark.
authors.forename: Ann
authors.initials: A
authors.lastname: Wenzel
authors.affiliation: Professor, Department of Surgery and Orthopedics, School of Dentistry, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Brazil.
authors.forename: Heloisa Emilia Dias
authors.initials: HE
authors.lastname: da Silveira
mesh_terms: D054893:Cone-Beam Computed Tomography; D018772:Dental Marginal Adaptation; D003793:Dental Restoration, Permanent; D006801:Humans; D066298:In Vitro Techniques; D008670:Metals; D017755:Prosthesis Fitting; D011857:Radiographic Image Interpretation, Computer-Assisted; D014070:Tooth / Q000000981:diagnostic imaging*
chemical_list: D008670:Metals