The Antibacterial Effect of Nd:YAG Laser Treatment of Teeth with Apical Periodontitis : A Randomized Controlled Trial

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The Antibacterial Effect of Nd:YAG Laser Treatment of Teeth with Apical Periodontitis : A Randomized Controlled Trial

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Publication Article, peer reviewed scientific
Title The Antibacterial Effect of Nd:YAG Laser Treatment of Teeth with Apical Periodontitis : A Randomized Controlled Trial
Author Granevik Lindström, Maria ; Wolf, Eva ; Fransson, Helena
Date 2017
English abstract
INTRODUCTION: The aim of this blind, in vivo, randomized controlled trial was to evaluate the antibacterial effect of Nd:YAG laser irradiation in endodontic treatment of single-rooted teeth with apical periodontitis. The hypothesis was that mechanical enlargement of the root canal and Nd:YAG laser irradiation would yield more negative bacterial samples than conventional treatment. METHODS: Forty-one patients (45 teeth) were allocated to the laser (n = 22) or control (n = 23) group. The teeth in the laser group were instrumented, irrigated with saline, and irradiated with Nd:YAG laser according to a standard protocol. The teeth in the control group were similarly instrumented but irrigated with 1% unbuffered sodium hypochlorite and 15% EDTA solution. Bacterial samples were taken before and after treatment, blinded, and immediately sent for culturing and analysis. RESULTS: The initial bacterial samples were positive in 20 of 22 teeth in the laser group and 18 of 23 (P = .414) in the control group. After the initial treatment, negative bacterial samples were found in 11 teeth in the laser group and 13 (P = .768) in the control group. After 2 to 4 days with no antibacterial dressing in the root canals, 5 teeth in the laser group and 9 (P = .337) in the control group yielded negative bacterial samples. CONCLUSIONS: After intervention, neither the test group nor the control group yielded predictable negative bacterial samples. Thus, the results failed to verify the hypothesis that Nd:YAG laser irradiation would yield significantly more negative bacterial samples than conventional irrigation with 1% unbuffered sodium hypochlorite solution.
DOI https://doi.org/10.1016/j.joen.2017.01.013 (link to publisher's fulltext.)
Publisher Elsevier
Host/Issue Journal of Endodontics;6
Volume 43
ISSN 0099-2399
Pages 857-863
Language eng (iso)
Subject Endodontics
root canal therapy
sodium hypochlorite
solid-state lasers
treatment outcome
Medicine
Research Subject Categories::ODONTOLOGY
Handle http://hdl.handle.net/2043/22671 Permalink to this page
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