![]() Secondary or recurrent caries are located around restoration margins or under these lesions, and can lead to tooth loss. Larger drills showed the highest sensitivity and specificity values of the area under the ROC curve. The negative filter obtained the worst results. The best method of diagnosis was by using a DSR. ![]() The highest values were found for 1-mm drills and the lowest for 0.25-mm drills, with negative filter having the lowest values of all (Az = 0.631). Sensitivity and specificity of the area under the receiver operator characteristic (ROC) curve (Az) were higher for DSR images with all three drills (Az = 0.896, 0.979, and 1.000 for drills 0.25, 0.5, and 1 mm, respectively). ![]() Images (n = 360) were evaluated by three raters, all experts in dental radiology. Filtered images were obtained with Kodak Dental Imaging 6.1 software. A posteriori DSR registrations were done with Regeemy 0.2.43 and subtraction with Image Tool 3.0. Kodak RVG 6100 sensor was used to capture the images. ![]() The teeth were arranged in pairs in 10 blocks of vinyl polysiloxane, and proximal defects were performed with drills of 0.25, 0.5, and 1 mm diameter. TO COMPARE THE DIAGNOSTIC ACCURACY OF THREE DIFFERENT IMAGING SYSTEMS: Direct digital radiography system (DDR-CMOS), four types of filtered images, and a priori and a posteriori registration of digital subtraction radiography (DSR) in the diagnosis of proximal defects.
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