Comparison of Root Resorption in Endodontically and Non-Endodontically Treated Teeth in Patients with Fixed Orthodontic Treatment during 2009-2018

Introduction: Apical root Resorption is a common occurrence during fixed orthodontic treatment. This study used panoramic radiographs to compare the rate of root resorption in endodontically-treated and non-endodontically-treated roots. Methods: In this descriptive-analytic study, panoramic radiographs of 20 patients aged 11-18 years with Class I Crowding and Class II Mild Skeletal malocclusions and with one or more endodontically-treated maxillary anterior teeth in one side and corresponding non-endodontically-treated teeth on the other side of the jaw were selected. They had presented to Dental School of Shahid Sadoughi University of Medical Sciences and private dental offices in Yazd. All panoramic radiographs of central and lateral maxillary incisors obtained before and after treatment were scanned and displayed on a large monitor with X2 magnification. In this way, the real magnitude of root degeneration was estimated by comparing the root heights in the pre- and post-treatment radiographs. The data were analyzed by SPSS 22 and T-test. Results: The findings showed that the greatest rate of root resorption was observed in the upper maxillary lateral incisors of endodontically-treated teeth by 1 mm and in maxillary lateral incisors of the non-endodontically-treated teeth by 1.5 mm. The mean root resorption was 0.325 mm in the endodontically-treated teeth and 1.025 mm in the non-endodontically treated teeth with a statistically significant difference (P>0.001). Conclusion: The results demonstrated that root resorption was smaller after treatment in endodontically-treated teeth than non-endodontically-treated teeth.