Sterilization Effect of Er:YAG Laser on Enterococcus Faecalis in Curved Root Canals: An in Vitro Study

doi:10.13701/j.cnki.kqyxyj.2021.11.006

Abstract

Abstract: Objective: To explore the difference in the sterilization effect of Er:YAG laser PIPS, SWEEPS, and traditional irrigation methods in straight root canals and curved root canals of multiple teeth. Methods: The straight root canal and the curved root canal were selected to establish the Enterococcus faecalis infection model. The isolated teeth were randomly divided into 8 groups, 15 cases in each group, and the following treatments were performed: A (PIPS + straight root canal); B (PIPS + curved root canal); C (SWEEPS + straight root canal); D (SWEEPS + curved root canal); E (PUI + straight root canal); F (PUI + curved root canal); G (CI + straight root canal); H (CI + curved root canal), the same batch of isolated teeth were selected as a blank control. After treatment, the bacteria were extracted and cultured. After 24 hours, the colonies were counted and observed by scanning electron microscope and laser confocal. Results: Sterilization effect of each group: straight root canal: PIPS/SWEEPS>PUI>CI; curved root canal group: SWEEPS>PIPS/PUI>CI. SWEEPS group can reach a higher sterilization depth in the root canal at the apex and smear removal effect. Conclusion: Compared with traditional root canal irrigation methods, Er:YAG laser PIPS and SWEEPS can significantly improve the removal of bacteria and smear layer in curved root canals, and SWEEPS is better than PIPS.

Key words: erbium laser, photon-initiated photoacoustic streaming, shock wave enhanced emission, sterilization, smear layer

HE Rong, LIU Xuejun, ZHOU Yukun. Sterilization Effect of Er:YAG Laser on Enterococcus Faecalis in Curved Root Canals: An in Vitro Study[J]. Journal of Oral Science Research, 2021, 37(11): 981-988.

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