ABSTRACT
Objective: Vertical root fracture [VRF] is among the most common causes of endodontic treatment failures. This study aims to compare charge-coupled devices [CCD] and photostimulable phosphor plates [PSP] for detection of vertical root fractures in endodontically treated teeth
Methods: In this diagnostic in vitro study, 40 maxillary anterior teeth were selected and after preparation and root canal filling, their crowns were cut 2mm above the cementoenamel junction [CEJ]. The teeth were embedded in a piece of dried bone and radiographed using CCD and PSP with equal geometry at zero and 15[degree sign] horizontal angles. VRFs were then induced and the fractured fragments were reattached. The teeth were radiographed again. Three observers evaluated the radiographs for detection of fracture line. Data were analyzed using the Proportion test and Wilcoxon's Signed Ranks test
Results: No significant difference was found between the two sensors in detection of VRFs [p-value [complete]= 0.592, p-value [absolute]= 1]. The sensitivity of the two sensors for detection of buccolingual and mesiodistal fractures was not significantly different [p-value BL [absolute]= 0.109, p-value BL [complete] 0.180] [p-value MD [complete]=0.593, p-value MD [absolute]= 0.102]. The sensitivity of both sensors for detection of buccolingual fracture was higher than for mesiodistal fractures [p<0.001]
Conclusion: CCD and PSP had equal efficacy for detection of VRFs in endodontically treated teeth
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