In Vivo Detection of External Apical Root Resorption Induced by Apical Periodontitis Using Periapical Radiography and Cone-Beam Computed Tomography

Objective: To compare the accuracy of periapical radiography (PR) and cone-beam computed tomography (CBCT) for detection external apical root resorption (EARR) due to canal contamination. Material Methods: Dog’s teeth with experimentally induced contamination underwent or not treatment (n=62). True positives (TP), false (FP), true negatives (TN), (FN) in PR CBCT diagnoses were determined using histopathologic findings as gold standard. Sensitivity, specificity, positive predictive value (PPV), negative (NPV), diagnostic (TP + TN) diagnosis EARR calculated. Data compared chi-squared test (α=0.05). Results: was detected 35% roots by PR, 47% CBCT, 50% microscopy (p=0.03 versus microscopy; p=0.67 microscopy). Overall, produced more accurate than (p=0.008). allowed identification large 100% cases showed same accuracy. However, small resorptions, an 0.83, whereas 0.96 (p=0.003). Conclusion: Cone-beam higher detecting endodontic origin.