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Effect of sodium hypochlorite on conventional and heat-treated nickel-titanium endodontic rotary instruments – An in vitro study

BACKGROUND/PURPOSE: Sodium hypochlorite (NaOCl) is a highly alkaline solution which exhibits antimicrobial properties. However, it causes corrosion to endodontic rotary files. This study investigated the effect of NaOCl on the metal surface of five different unused endodontic rotary files in vitro....

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Autores principales: Han-Hsing Lin, Jack, Karabucak, Bekir, Lee, Su-Min
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Association for Dental Sciences of the Republic of China 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8025147/
https://www.ncbi.nlm.nih.gov/pubmed/33854727
http://dx.doi.org/10.1016/j.jds.2020.08.015
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author Han-Hsing Lin, Jack
Karabucak, Bekir
Lee, Su-Min
author_facet Han-Hsing Lin, Jack
Karabucak, Bekir
Lee, Su-Min
author_sort Han-Hsing Lin, Jack
collection PubMed
description BACKGROUND/PURPOSE: Sodium hypochlorite (NaOCl) is a highly alkaline solution which exhibits antimicrobial properties. However, it causes corrosion to endodontic rotary files. This study investigated the effect of NaOCl on the metal surface of five different unused endodontic rotary files in vitro. MATERIALS AND METHODS: Two non-heat-treated nickel-titanium (NiTi) files, ProTaper, BioRace, and three heat-treated NiTi files, VortexBlue, TRUShape, and EdgeFile X7 files, were immersed in 4% NaOCl for 5, 10, and 20 min, and 1, 6 and 24 h. The corrosion susceptibility was evaluated by visual inspection and scanning electron microscopy (SEM). RESULTS: In the TRUShape group, the black particulate matter was mostly formed at the file's curvature and shaft. A large amount of precipitate accumulated in the EdgeFile group. The extent and prevalence of surface defects were found to be consistently higher in EdgeFile X7 instruments than in any other instruments. EdgeFile X7 and TRUShape files exhibited a greater corrosive tendency to NaOCl than BioRace, ProTaper, and VortexBlue not only under visual inspection, but also under SEM analysis after prolonged immersion (1, 6, 24 h) in 4% NaOCl. However, shorter immersion periods (5, 10, 20 min) showed little surface corrosion across all experimental groups. CONCLUSION: Within the limitations of this study, EdgeFile X7 and TRUShape files exhibit greater corrosive tendencies to NaOCl in vitro than BioRace, ProTaper, and VortexBlue files after prolonged immersion in 4% NaOCl. However, shorter immersion periods, which more closely approximate clinical conditions during single root canal therapy, may not show surface corrosion across all experimental groups.
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spelling pubmed-80251472021-04-13 Effect of sodium hypochlorite on conventional and heat-treated nickel-titanium endodontic rotary instruments – An in vitro study Han-Hsing Lin, Jack Karabucak, Bekir Lee, Su-Min J Dent Sci Original Article BACKGROUND/PURPOSE: Sodium hypochlorite (NaOCl) is a highly alkaline solution which exhibits antimicrobial properties. However, it causes corrosion to endodontic rotary files. This study investigated the effect of NaOCl on the metal surface of five different unused endodontic rotary files in vitro. MATERIALS AND METHODS: Two non-heat-treated nickel-titanium (NiTi) files, ProTaper, BioRace, and three heat-treated NiTi files, VortexBlue, TRUShape, and EdgeFile X7 files, were immersed in 4% NaOCl for 5, 10, and 20 min, and 1, 6 and 24 h. The corrosion susceptibility was evaluated by visual inspection and scanning electron microscopy (SEM). RESULTS: In the TRUShape group, the black particulate matter was mostly formed at the file's curvature and shaft. A large amount of precipitate accumulated in the EdgeFile group. The extent and prevalence of surface defects were found to be consistently higher in EdgeFile X7 instruments than in any other instruments. EdgeFile X7 and TRUShape files exhibited a greater corrosive tendency to NaOCl than BioRace, ProTaper, and VortexBlue not only under visual inspection, but also under SEM analysis after prolonged immersion (1, 6, 24 h) in 4% NaOCl. However, shorter immersion periods (5, 10, 20 min) showed little surface corrosion across all experimental groups. CONCLUSION: Within the limitations of this study, EdgeFile X7 and TRUShape files exhibit greater corrosive tendencies to NaOCl in vitro than BioRace, ProTaper, and VortexBlue files after prolonged immersion in 4% NaOCl. However, shorter immersion periods, which more closely approximate clinical conditions during single root canal therapy, may not show surface corrosion across all experimental groups. Association for Dental Sciences of the Republic of China 2021-03 2020-09-14 /pmc/articles/PMC8025147/ /pubmed/33854727 http://dx.doi.org/10.1016/j.jds.2020.08.015 Text en © 2020 Association for Dental Sciences of the Republic of China. Publishing services by Elsevier B.V. http://creativecommons.org/licenses/by-nc-nd/4.0/ This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
spellingShingle Original Article
Han-Hsing Lin, Jack
Karabucak, Bekir
Lee, Su-Min
Effect of sodium hypochlorite on conventional and heat-treated nickel-titanium endodontic rotary instruments – An in vitro study
title Effect of sodium hypochlorite on conventional and heat-treated nickel-titanium endodontic rotary instruments – An in vitro study
title_full Effect of sodium hypochlorite on conventional and heat-treated nickel-titanium endodontic rotary instruments – An in vitro study
title_fullStr Effect of sodium hypochlorite on conventional and heat-treated nickel-titanium endodontic rotary instruments – An in vitro study
title_full_unstemmed Effect of sodium hypochlorite on conventional and heat-treated nickel-titanium endodontic rotary instruments – An in vitro study
title_short Effect of sodium hypochlorite on conventional and heat-treated nickel-titanium endodontic rotary instruments – An in vitro study
title_sort effect of sodium hypochlorite on conventional and heat-treated nickel-titanium endodontic rotary instruments – an in vitro study
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8025147/
https://www.ncbi.nlm.nih.gov/pubmed/33854727
http://dx.doi.org/10.1016/j.jds.2020.08.015
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