Rubens Spin-Neto

Diagnostic accuracy of cone beam computed tomography sections with various thicknesses for detecting misfit between the tooth and restoration in metal-restored teeth

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  • Gabriela Salatino Liedke, Oral Radiology, Department of Surgery and Orthopedics, School of Dentistry, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Brasilien
  • Rubens Spin-Neto
  • Mariana Boessio Vizzotto, Oral Radiology, Department of Surgery and Orthopedics, School of Dentistry, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Brasilien
  • Priscila Fernanda da Silveira, Oral Radiology, Department of Surgery and Orthopedics, School of Dentistry, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Brasilien
  • Ann Wenzel
  • Heloisa Emilia Dias da Silveira, Oral Radiology, Department of Surgery and Orthopedics, School of Dentistry, Federal University of Rio Grande do Sul (UFRGS), Porto Alegre, Brasilien

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.

STUDY DESIGN: 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.

OriginalsprogEngelsk
TidsskriftOral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
Vol/bind120
Nummer2
Sider (fra-til)e131-e137
Antal sider7
ISSN2212-4403
DOI
StatusUdgivet - aug. 2015

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