Journal Browser Advanced Search Help
Journal Browser Advanced search HELP
Imaging Sci Dent. 2015 Sep;45(3):141-145. English. Original Article. https://doi.org/10.5624/isd.2015.45.3.141
Miri S , Mehralizadeh S , Sadri D , Motamedi MR , Soltani P .
Department of Endodontics, School of Dentistry, Kermanshah University of Medical Sciences, Kermanshah, Iran.
Department of Oral and Maxillofacial Radiology, School of Dentistry, Islamic Azad University, Tehran, Iran.
Department of Oral and Maxillofacial Pathology, School of Dentistry, Islamic Azad University, Tehran, Iran.
Department of Research, School of Dentistry, Isfahan Branch, Islamic Azad University, Isfahan, Iran.
Dental Students Research Center, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran. parisa.soltani@live.com
Abstract

PURPOSE: This study evaluated the diagnostic accuracy of the reverse contrast mode in intraoral digital radiography for the detection of proximal dentinal caries, in comparison with the original digital radiographs. MATERIALS AND METHODS: Eighty extracted premolars with no clinically apparent caries were selected, and digital radiographs of them were taken separately in standard conditions. Four observers examined the original radiographs and the same radiographs in the reverse contrast mode with the goal of identifying proximal dentinal caries. Microscopic sections 5 microm in thickness were prepared from the teeth in the mesiodistal direction. Four slides prepared from each sample used as the diagnostic gold standard. The data were analyzed using SPSS (alpha=0.05). RESULTS: Our results showed that the original radiographs in order to identify proximal dentinal caries had the following values for sensitivity, specificity, positive predictive value, negative predictive value, and accuracy, respectively: 72.5%, 90%, 87.2%, 76.5%, and 80.9%. For the reverse contrast mode, however, the corresponding values were 63.1%, 89.4%, 87.1%, 73.5%, and 78.8%, respectively. The sensitivity of original digital radiograph for detecting proximal dentinal caries was significantly higher than that of reverse contrast mode (p<0.05). However, no statistically significant differences were found regarding specificity, positive predictive value, negative predictive value, or accuracy (p>0.05). CONCLUSION: The sensitivity of the original digital radiograph for detecting proximal dentinal caries was significantly higher than that of the reversed contrast images. However, no statistically significant differences were found between these techniques regarding specificity, positive predictive value, negative predictive value, or accuracy.

Copyright © 2019. Korean Association of Medical Journal Editors.