Abstract

Background: The purpose of this study was to evaluate and compare the dentine erosion ability of root canal irrigation methods with chelat solution. Materials and Methods: 45 premolar roots were selected and randomly divided into 3 groups (n = 15) based on root canal irrigation methods with 17% EDTA solution: (1) Conventional needle irrigation, (2) Ultrasonic activation, (3) Sonic activation. After undergoing sample processing, the half roots were observed and evaluated for the erosion dentine under a scanning electron microscope with a magnification of 1000 times according to Torabinejad (2003). Results: In cervical, the average dentine erosion score of the 3 study groups was not statistically significant (p > 0.05). In the middle, apical and over the root canal, the average dentine erosion score of the sonic activation method was higher than that of the other groups (p < 0.05). Conclusion: Sonic irrigation cause higher dentine erosion than conventional needle irrigation and ultrasonic activation.