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Effect of bracket bonding with Er: YAG laser on nanomechanical properties of enamel

BACKGROUND: The aim of this study was to compare the effects of conventional acid etching and laser etching on the nano-mechanical properties of the dental enamel using nano-indentation test. MATERIALS AND METHODS: In this experimental in vitro study, buccal surfaces of 10 premolars were divided int...

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Autores principales: Alavi, Shiva, Birang, Reza, Hajizadeh, Fatemeh, Banimostafaee, Hamed
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Medknow Publications & Media Pvt Ltd 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3955315/
https://www.ncbi.nlm.nih.gov/pubmed/24688560
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author Alavi, Shiva
Birang, Reza
Hajizadeh, Fatemeh
Banimostafaee, Hamed
author_facet Alavi, Shiva
Birang, Reza
Hajizadeh, Fatemeh
Banimostafaee, Hamed
author_sort Alavi, Shiva
collection PubMed
description BACKGROUND: The aim of this study was to compare the effects of conventional acid etching and laser etching on the nano-mechanical properties of the dental enamel using nano-indentation test. MATERIALS AND METHODS: In this experimental in vitro study, buccal surfaces of 10 premolars were divided into three regions. One of the regions was etched with 37% phosphoric acid and another etched with Er:YAG laser, the third region was not etched. The brackets were bonded to both of etched regions. After thermocycling for 500 cycles, the brackets were removed and the teeth were decoronated from the bracket bonding area. Seven nano-indentations were applied at 1-31 μm depth from the enamel surface in each region. Mean values of the hardness and elastic modulus were analyzed with repeated measures analysis of variance and Tukey HSD tests, using the SPSS software (SPSS Inc., version16.0, Chicago, Il, USA). P < 0.05 was considered as significant. RESULTS: The hardness up to 21 μm in depth and elastic modulus up to 6 μm in depth from the enamel surface for laser-etched enamel had significantly higher values than control enamel and the hardness up to 11 μm in depth and elastic modulus up to 6 μm in depth for acid-etched enamel had significantly lower values than the control enamel. CONCLUSION: The mechanical properties of the enamel were decreased after bracket bonding with conventional acid etching and increased after bonding with Er:YAG laser.
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spelling pubmed-39553152014-03-31 Effect of bracket bonding with Er: YAG laser on nanomechanical properties of enamel Alavi, Shiva Birang, Reza Hajizadeh, Fatemeh Banimostafaee, Hamed Dent Res J (Isfahan) Original Article BACKGROUND: The aim of this study was to compare the effects of conventional acid etching and laser etching on the nano-mechanical properties of the dental enamel using nano-indentation test. MATERIALS AND METHODS: In this experimental in vitro study, buccal surfaces of 10 premolars were divided into three regions. One of the regions was etched with 37% phosphoric acid and another etched with Er:YAG laser, the third region was not etched. The brackets were bonded to both of etched regions. After thermocycling for 500 cycles, the brackets were removed and the teeth were decoronated from the bracket bonding area. Seven nano-indentations were applied at 1-31 μm depth from the enamel surface in each region. Mean values of the hardness and elastic modulus were analyzed with repeated measures analysis of variance and Tukey HSD tests, using the SPSS software (SPSS Inc., version16.0, Chicago, Il, USA). P < 0.05 was considered as significant. RESULTS: The hardness up to 21 μm in depth and elastic modulus up to 6 μm in depth from the enamel surface for laser-etched enamel had significantly higher values than control enamel and the hardness up to 11 μm in depth and elastic modulus up to 6 μm in depth for acid-etched enamel had significantly lower values than the control enamel. CONCLUSION: The mechanical properties of the enamel were decreased after bracket bonding with conventional acid etching and increased after bonding with Er:YAG laser. Medknow Publications & Media Pvt Ltd 2014 /pmc/articles/PMC3955315/ /pubmed/24688560 Text en Copyright: © Dental Research Journal http://creativecommons.org/licenses/by-nc-sa/3.0 This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Article
Alavi, Shiva
Birang, Reza
Hajizadeh, Fatemeh
Banimostafaee, Hamed
Effect of bracket bonding with Er: YAG laser on nanomechanical properties of enamel
title Effect of bracket bonding with Er: YAG laser on nanomechanical properties of enamel
title_full Effect of bracket bonding with Er: YAG laser on nanomechanical properties of enamel
title_fullStr Effect of bracket bonding with Er: YAG laser on nanomechanical properties of enamel
title_full_unstemmed Effect of bracket bonding with Er: YAG laser on nanomechanical properties of enamel
title_short Effect of bracket bonding with Er: YAG laser on nanomechanical properties of enamel
title_sort effect of bracket bonding with er: yag laser on nanomechanical properties of enamel
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3955315/
https://www.ncbi.nlm.nih.gov/pubmed/24688560
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