Physics of Fluids - Publications

Irrigant flow in the root canal during ultrasonic activation: A numerical fluid-structure interaction model and its validation

Open Access
International Endodontic Journal 55, 938–949 (2022)

Authors

	Christos Boutsioukis
	Bram Verhaagen
	Lucas W. M. van der Sluis
	Michel Versluis

BibTeΧ

@article{https://doi.org/10.1111/iej.13791,
author = {Boutsioukis, Christos and Verhaagen, Bram and van der Sluis, Lucas W. M. and Versluis, Michel},
title = {Irrigant flow in the root canal during ultrasonic activation: A numerical fluid‚Äìstructure interaction model and its validation},
journal = {International Endodontic Journal},
volume = {55},
number = {9},
pages = {938-949},
keywords = {Computational Fluid Dynamics, high-speed imaging, irrigation, Particle Image Velocimetry, ultrasonic activation},
doi = {https://doi.org/10.1111/iej.13791},
url = {https://onlinelibrary.wiley.com/doi/abs/10.1111/iej.13791},
eprint = {https://onlinelibrary.wiley.com/doi/pdf/10.1111/iej.13791},
abstract = {Abstract Aim The aim of the study was (a) to develop a three-dimensional numerical model combining the oscillation of a tapered ultrasonic file and the induced irrigant flow along with their two-way interaction in the confinement of a root canal. (b) To validate this model through comparison with experiments and theoretical (analytical) solutions of the flow. Methodology Two partial numerical models, one for the oscillation of the ultrasonic file and another one for the irrigant flow inside the root canal around the file, were created and coupled in order to take into account the two-way coupled fluid‚Äìstructure interaction. Simulations were carried out for ultrasonic K-files and for smooth wires driven at four different amplitudes in air or inside an irrigant-filled straight root canal. The oscillation pattern of the K-files was determined experimentally by Scanning Laser Vibrometry, and the flow pattern inside an artificial root canal was analysed using high-speed imaging together with Particle Image Velocimetry. Analytical solutions were obtained from an earlier study. Numerical, experimental and analytical results were compared to assess the validity of the model. Results The comparison of the oscillation amplitude and node location of the ultrasonic files and of the irrigant flow field showed a close agreement between the simulations, experiments and theoretical solutions. Conclusions The model is able to predict reliably the file oscillation and irrigant flow inside root canals during ultrasonic activation under similar conditions.},
year = {2022}
}