Antibacterial Effects of the Novel Blue Laser and Erbium Chromium Laser on Enterococcus Faecalis in Root Canal Dentin with Different Thicknesses

Author:

Hendi Seyedeh Sareh1ORCID,Ahmadyani Erfan1,Alikhani Mohammad Yousef2ORCID,Farhadian Maryam3,Mirzaei Alireza4ORCID

Affiliation:

1. Faculty of Dentistry, Department of Endodontics, Hamadan University of Medical Sciences, Hamadan, Iran

2. Faculty of Medicine, Department of Microbiology, Hamadan University of Medical Sciences, Hamadan, Iran

3. Department of Biostatics, School of Public Health and Research Center for Health Sciences, Hamadan University of Medical Sciences, Hamadan, Iran

4. Faculty of Dentistry, Department of Laser Research, Islamic Azad University, Tehran, Iran

Abstract

The aim of this study was to investigate the antibacterial effects of 445 nm blue diode lasers and erbium chromium lasers on the biofilm of Enterococcus faecalis in root canal dentin with different thicknesses. Dentin slices with thicknesses of 300, 500, and 1,000 microns were prepared; and after the biofilm formation, they were randomly divided into four groups: group A : Er, Cr:YSGG laser radiation; group B: 445 nm diode laser radiation; group C : laser radiation in three cycles; and control group D: 5 samples of each thickness were selected as a positive control group. Er, Cr:YSGG and diode lasers alone did not significantly reduce the number of bacteria in any of the thicknesses. Only in 1 mm thick sections, the group exposed with the both Er, Cr:YSGG laser and 445 nm diode laser (66%) significantly reduced the number of bacteria. There was a significant difference in a thickness of 0.3 mm compared to a thickness of 1 mm, indicating that these lasers had a better effect at a thickness of 0.3 mm than at 1 mm parts (P-value < 0.008). It seems that these lasers can be used as an adjunct to conventional chemical methods in cleaning infected canals.

Funder

Hamadan University of Medical Sciences

Publisher

Hindawi Limited

Subject

General Dentistry

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