Numerical Evaluation of Flow Pattern for Root Canal Irrigation Including Microbubbles

Abstract

This study has the initial purpose of pursuing the efficiency of endodontic treatment by applying microbubbles to a NaOCl cleaning solution. The effects of average apical pressure and wall shear stress were found to determine the cleaning quality of the root canal. Using a G-30 needle and a flow rate of 0.26 ml/s, met acceptance criteria in apical pressure. In the straight root canal shape, the side-vent type enhanced the smear layer removal area more effectively attributed to the wall shear stress. In curved root canals, the flat open type was beneficial in generating wall shear stress relative to the curvature of the curved canal. In the fluidity of the cleaning solution according to the bubble dissolution, a slight change appeared in the average apical pressure. Due to the G-30 needle