The efficacy of the reverse contrast mode in digital radiography for the detection of proximal dentinal caries
| Autor: | Shimasadat Miri, Mahmood Reza Kalantar Motamedi, Donya Sadri, Sandra Mehralizadeh, Parisa Soltani |
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| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Radiological and Ultrasound Technology
business.industry Radiography media_common.quotation_subject Dentistry Diagnostic accuracy Gold standard (test) Radiography Dental Digital Image enhancement Dental Caries Image Enhancement Predictive value Image Processing Computer-Assisted Medicine Contrast (vision) Radiology Nuclear Medicine and imaging Original Article business General Dentistry Digital radiography media_common |
| Zdroj: | Imaging Science in Dentistry |
| ISSN: | 2233-7830 2233-7822 |
| Popis: | 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 µm 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 (α=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 (p0.05). 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. |
| Databáze: | OpenAIRE |
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