ABSTRACT
Background and Aim: Detection of Horizontal root fracture is completely related to radiography and application of new methods is indispensable .The aim of this study was to compare the diagnostic accuracy of reverse contrast option of digital radiography with original images for detection of horizontal root fracture
Materials and methods: In this diagnostic study, digital radiographs were taken from 40 maxillary anterior teeth mounted in a dry alveolar socket with vertical angles of 0[degree sign]and 15 [degree sign] .Root fractures were created in the horizontal plane on each root and after relocating root fragments radiographs were repeated in a same position. Images were processed with reverse contrast option and assessed by observers. Data were analyzed with proportion test and Cochran's Q test
Results: There was no significant difference in sensitivity, specificity, PPV[Positive Predictive value] and NPV [Negative Predictive Value] between 0[degree sign]and 15[degree sign]radiographs in original and reverse contrast images. In either image groups, when fractures were certainly diagnosed by observers, 0[degree sign]radiographs obtained higher sensitivities [P=0.014] Also when fractures were likely diagnosed , sensitivity and NPV were significantly higher for 0[degree sign]radiographs [P=0.035] ,[P=0.023]respectively
Conclusion: The diagnostic accuracy of reverse contrast option of digital images are equal to original images, although 0[degree sign]radiographs are more appropriate