Interference of artifacts on the detection of vertical radicular fractures on bovine’s teeth with metallic nucleus on cone beam computed tomography
Keywords:Artifacts, Cone beam Computed Tomography, Tooth Fractures
Objectives: To evaluate the interference of artefacts (beamhardening) in the detection of vertical root fractures using the cone beam computed tomography and to measure its sensitivity, specificity and accuracy. Materials and Methods: 15 inferior incisive bovine roots were used after endodontic treatment and desobturation of 10 mm on each one. They were rehabilitated with a metallic nucleus, and cementation with zinc phosphate was made. The cone beam computed tomography exams were made before (T0) and after (T1) the induction of fractures, which were evaluated by two independent examiners, aimed at evaluating the presence and localization of the dental root fractures, as well as the localization of beamhardening interference in the detection of vertical root fractures, using a Angio Sharpen High 5X5 filter. Results: The presence of beamhardening were detected in 100% of the roots, which were more frequently observed on the middle third of the roots. In both moments of the evaluation (T0 and T1), the localization of beamhardening were proportionally the same as those of local fractures, given a positive diagnoses of fracture even if they didn’t exist. Conclusion: Cone beam computed tomography showed 78% of sensitivity, 63% of specificity and 68% of accuracy, showing that cone beam computed tomography is only an auxiliary method for diagnosis of dental root fractures in teeth treated with metallic nucleus.
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