Imaging Science in Dentistry

Korean Academy of Oral and Maxillofacial Radiology (대한영상치의학회)
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Effects of various cone-beam computed tomography settings on the detection of recurrent caries under restorations in extracted primary teeth

  • Kamburoglu, Kivanc (Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Ankara University) ;
  • Sonmez, Gul (Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Ankara University) ;
  • Berktas, Zeynep Serap (Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Ankara University) ;
  • Kurt, Hakan (Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Ankara University) ;
  • Ozen, Dogukan (Department of Biostatistics, Faculty of Veterinary Medicine, Ankara University)
  • Received : 2017.04.05
  • Accepted : 2017.05.13
  • Published : 2017.06.30
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Abstract

Purpose: The aim of this study was to assess the ex vivo diagnostic ability of 9 different cone-beam computed tomography (CBCT) settings in the detection of recurrent caries under amalgam restorations in primary teeth. Materials and Methods: Fifty-two primary teeth were used. Twenty-six teeth had dentine caries and 26 teeth did not have dentine caries. Black class II cavities were prepared and restored with amalgam. In the 26 carious teeth, recurrent caries were left under restorations. The other 26 intact teeth that did not have caries served as controls. Teeth were imaged using a $100{\times}90-mm$ field of view and a 0.2-mm voxel size with 9 different CBCT settings. Four observers assessed the images using a 5-point scale. Kappa values were calculated to assess observer agreement. CBCT settings were compared with the gold standard using a receiver operating characteristic analysis. The area under the curve (AUC) values for each setting were compared using the chi-square test, with a significance level of ${\alpha}=.05$. Results: Intraobserver kappa values ranged from 0.366 to 0.664 for observer 1, from 0.311 to 0.447 for observer 2, from 0.597 to 1.000 for observer 3, and from 0.869 to 1 for observer 4. Furthermore, interobserver kappa values among the observers ranged from 0.133 to 0.814 for the first reading and from 0.197 to 0.805 for the second reading. The highest AUC values were found for setting 5 (0.5916) and setting 3 (0.5886), and were not found to be statistically significant(P>.05). Conclusion: Variations in tube voltage and tube current did not affect the detection of recurrent caries under amalgam restorations in primary teeth.

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References

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