Mineral Loss and Morphological Changes in Dental Enamel Induced by a 16% Carbamide Peroxide Bleaching Gel
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/0103-6440201302225 http://hdl.handle.net/11449/126194 |
Resumo: | The aim of this study was to compare the effect of a 16% carbamide peroxide (CP) gel and a 10% CP gel on mineralized enamel content and morphology. Enamel blocks from bovine incisors were subjected to a 14-day treatment (8 h/day) with 10% or 16% CP gels. Knoop microhardness was evaluated before bleaching and at 1, 7 or 14 days after this treatment (50 g/15 s). Mineral content (energy-dispersive x-ray spectroscopy), surface roughness and topography (atomic force microscopy) were evaluated at the 14-day period. Data were analyzed statistically by two-way ANOVA and Tukey's test (α=0.05). Significant microhardness reduction was observed at the 7 th and 14 th days for 10% CP gel, and for all bleaching times for 16% CP gel (p<0.05). At the 14-day period, a significant decrease in Ca and P content, increase on surface roughness (p<0.05) as well as on picks and valleys distance were observed when both bleaching gels were used. These enamel alterations were more intense for 16% CP gel. It was concluded that both CP-based gels promoted loss of mineral structure from enamel, resulting in a rough and porous surface. However, 16% CP gel caused the most intense adverse effects on enamel. |
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Mineral Loss and Morphological Changes in Dental Enamel Induced by a 16% Carbamide Peroxide Bleaching Gelatomic force microscopycarbamide peroxidetooth enamelhardness teststooth bleachingThe aim of this study was to compare the effect of a 16% carbamide peroxide (CP) gel and a 10% CP gel on mineralized enamel content and morphology. Enamel blocks from bovine incisors were subjected to a 14-day treatment (8 h/day) with 10% or 16% CP gels. Knoop microhardness was evaluated before bleaching and at 1, 7 or 14 days after this treatment (50 g/15 s). Mineral content (energy-dispersive x-ray spectroscopy), surface roughness and topography (atomic force microscopy) were evaluated at the 14-day period. Data were analyzed statistically by two-way ANOVA and Tukey's test (α=0.05). Significant microhardness reduction was observed at the 7 th and 14 th days for 10% CP gel, and for all bleaching times for 16% CP gel (p<0.05). At the 14-day period, a significant decrease in Ca and P content, increase on surface roughness (p<0.05) as well as on picks and valleys distance were observed when both bleaching gels were used. These enamel alterations were more intense for 16% CP gel. It was concluded that both CP-based gels promoted loss of mineral structure from enamel, resulting in a rough and porous surface. However, 16% CP gel caused the most intense adverse effects on enamel.O objetivo do presente estudo foi comparar o efeito de um gel com 16% de peróxido de carbamida (PC) sobre a estrutura mineral e morfologia do esmalte dental com os efeitos de um gel com 10% de PC. Blocos de esmalte provenientes de incisivos bovinos foram submetidos a 14 dias de tratamento (8 h/dia) com géis com 10 ou 16% de PC. A microdureza Knoop foi avaliada antes do clareamento e 1, 7 e 14 dias pós-tratamento (50 g/15 s). O conteúdo mineral (EDX), rugosidade de superfície e topografia (MFA) foram avaliados no período de 14 dias (ANOVA a dois critérios e teste de Tukey; α=0,05). Redução significante na microdureza foi observada nos períodos de 7 e 14 dias para o gel com 10% de PC, e em todos os períodos para o gel com 16% de PC (p<0,05). No período de 14 dias, uma diminuição significante no conteúdo de Ca e P, aumento na rugosidade de superfície (p<0,05), bem como na distância entre picos e vales foram observados para ambos os agentes clareadores usados. Estas alterações foram mais intensas para o gel com 16% de PC. Pôde-se concluir que ambos os géis à base de PC promoveram perda de estrutura mineral do esmalte, resultando em superfície mais rugosa e porosa. Porém, o gel com 16% de PC causou efeitos adversos mais intensos no esmalte dental.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)UNESP - Univ Estadual Paulista Araraquara School of Dentistry Department of Dental Materials and ProsthodonticsUNIB - University of Brasilia School of Dentistry Department of DentistryUFG - Federal University of Goias School of Dentistry Department of Stomatological SciencesUEPG - State University of Ponta Grossa School of Dentistry Department of Restorative DentistryUNESP Univ Estadual Paulista Araraquara School of Dentistry Department of Pediatric Dentistry and OrthodonticsUNESP - Univ Estadual Paulista Araraquara School of Dentistry Department of Physiology and PathologyUNESP - Univ Estadual Paulista Araraquara School of Dentistry Department of Dental Materials and ProsthodonticsUNESP Univ Estadual Paulista Araraquara School of Dentistry Department of Pediatric Dentistry and OrthodonticsUNESP - Univ Estadual Paulista Araraquara School of Dentistry Department of Physiology and PathologyFundação Odontológica de Ribeirão PretoUniversidade Estadual Paulista (Unesp)UNIB - University of Brasilia School of Dentistry Department of DentistryUFG - Federal University of Goias School of Dentistry Department of Stomatological SciencesUEPG - State University of Ponta Grossa School of Dentistry Department of Restorative DentistrySoares, Diana GabrielaRibeiro, Ana Paula DiasSacono, Nancy TomokoLoguercio, Alessandro DouradoHebling, JosimeriCosta, Carlos Alberto De Souza2015-08-06T16:14:47Z2015-08-06T16:14:47Z2013-09-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article517-521application/pdfhttp://dx.doi.org/10.1590/0103-6440201302225Brazilian Dental Journal. Fundação Odontológica de Ribeirão Preto, v. 24, n. 5, p. 517-521, 2013.0103-6440http://hdl.handle.net/11449/12619410.1590/0103-6440201302225S0103-64402013000500517S0103-64402013000500517.pdf4517484241515548SciELOreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengBrazilian Dental Journal0,476info:eu-repo/semantics/openAccess2023-11-17T06:14:00Zoai:repositorio.unesp.br:11449/126194Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-11-17T06:14Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Mineral Loss and Morphological Changes in Dental Enamel Induced by a 16% Carbamide Peroxide Bleaching Gel |
title |
Mineral Loss and Morphological Changes in Dental Enamel Induced by a 16% Carbamide Peroxide Bleaching Gel |
spellingShingle |
Mineral Loss and Morphological Changes in Dental Enamel Induced by a 16% Carbamide Peroxide Bleaching Gel Soares, Diana Gabriela atomic force microscopy carbamide peroxide tooth enamel hardness tests tooth bleaching |
title_short |
Mineral Loss and Morphological Changes in Dental Enamel Induced by a 16% Carbamide Peroxide Bleaching Gel |
title_full |
Mineral Loss and Morphological Changes in Dental Enamel Induced by a 16% Carbamide Peroxide Bleaching Gel |
title_fullStr |
Mineral Loss and Morphological Changes in Dental Enamel Induced by a 16% Carbamide Peroxide Bleaching Gel |
title_full_unstemmed |
Mineral Loss and Morphological Changes in Dental Enamel Induced by a 16% Carbamide Peroxide Bleaching Gel |
title_sort |
Mineral Loss and Morphological Changes in Dental Enamel Induced by a 16% Carbamide Peroxide Bleaching Gel |
author |
Soares, Diana Gabriela |
author_facet |
Soares, Diana Gabriela Ribeiro, Ana Paula Dias Sacono, Nancy Tomoko Loguercio, Alessandro Dourado Hebling, Josimeri Costa, Carlos Alberto De Souza |
author_role |
author |
author2 |
Ribeiro, Ana Paula Dias Sacono, Nancy Tomoko Loguercio, Alessandro Dourado Hebling, Josimeri Costa, Carlos Alberto De Souza |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) UNIB - University of Brasilia School of Dentistry Department of Dentistry UFG - Federal University of Goias School of Dentistry Department of Stomatological Sciences UEPG - State University of Ponta Grossa School of Dentistry Department of Restorative Dentistry |
dc.contributor.author.fl_str_mv |
Soares, Diana Gabriela Ribeiro, Ana Paula Dias Sacono, Nancy Tomoko Loguercio, Alessandro Dourado Hebling, Josimeri Costa, Carlos Alberto De Souza |
dc.subject.por.fl_str_mv |
atomic force microscopy carbamide peroxide tooth enamel hardness tests tooth bleaching |
topic |
atomic force microscopy carbamide peroxide tooth enamel hardness tests tooth bleaching |
description |
The aim of this study was to compare the effect of a 16% carbamide peroxide (CP) gel and a 10% CP gel on mineralized enamel content and morphology. Enamel blocks from bovine incisors were subjected to a 14-day treatment (8 h/day) with 10% or 16% CP gels. Knoop microhardness was evaluated before bleaching and at 1, 7 or 14 days after this treatment (50 g/15 s). Mineral content (energy-dispersive x-ray spectroscopy), surface roughness and topography (atomic force microscopy) were evaluated at the 14-day period. Data were analyzed statistically by two-way ANOVA and Tukey's test (α=0.05). Significant microhardness reduction was observed at the 7 th and 14 th days for 10% CP gel, and for all bleaching times for 16% CP gel (p<0.05). At the 14-day period, a significant decrease in Ca and P content, increase on surface roughness (p<0.05) as well as on picks and valleys distance were observed when both bleaching gels were used. These enamel alterations were more intense for 16% CP gel. It was concluded that both CP-based gels promoted loss of mineral structure from enamel, resulting in a rough and porous surface. However, 16% CP gel caused the most intense adverse effects on enamel. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-09-01 2015-08-06T16:14:47Z 2015-08-06T16:14:47Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1590/0103-6440201302225 Brazilian Dental Journal. Fundação Odontológica de Ribeirão Preto, v. 24, n. 5, p. 517-521, 2013. 0103-6440 http://hdl.handle.net/11449/126194 10.1590/0103-6440201302225 S0103-64402013000500517 S0103-64402013000500517.pdf 4517484241515548 |
url |
http://dx.doi.org/10.1590/0103-6440201302225 http://hdl.handle.net/11449/126194 |
identifier_str_mv |
Brazilian Dental Journal. Fundação Odontológica de Ribeirão Preto, v. 24, n. 5, p. 517-521, 2013. 0103-6440 10.1590/0103-6440201302225 S0103-64402013000500517 S0103-64402013000500517.pdf 4517484241515548 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Brazilian Dental Journal 0,476 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
517-521 application/pdf |
dc.publisher.none.fl_str_mv |
Fundação Odontológica de Ribeirão Preto |
publisher.none.fl_str_mv |
Fundação Odontológica de Ribeirão Preto |
dc.source.none.fl_str_mv |
SciELO reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
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1799964971535171584 |