Dental bleaching with violet LED: Effects on dentin color change, resin-dentin bond strength, hybrid layer nanohardness and dentinal collagen biostability
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.pdpdt.2020.102141 http://hdl.handle.net/11449/207042 |
Resumo: | Background: The purpose of this study was to investigate the effect of a novel dental bleaching technique with Violet LED on enamel color change, bond strength and hybrid layer nanomechanical properties in resin-dentin restoration, and dentin biostability. Methods: A total of 125 bovine incisors were distributed into a control group, violet LED group (LED), and 35 % peroxide hydrogen bleaching gel (BLG) groups (n = 15). Three 45-minute sessions were performed for both bleaching procedures every week. Enamel color change (ΔE, ΔL, and Δb) was determined after every bleaching session. After color analysis, dentin was exposed for the resin-dentin bond strength analysis using microtensile test and evaluation of the nanomechanical properties at the hybrid layer (nanohardness). While half of the specimens were tested immediately, the remaining were evaluated after 10,000 thermal cycles (TC). Thirty additional teeth were used to investigate dentin ultimate tensile strength (UTS) after the bleaching treatments. UTS was evaluated before and after an enzymatic challenge. Two-way repeated measures ANOVA and Tukey's post-test were used for the statistical analysis (α = 0.05). Results: Enamel bleaching effect was observed in the LED and BLG groups with significant alterations in the ΔE, ΔL, and Δb in the BLG group. No difference was observed in the resin-dentin bond strength among the groups (p > 0.05), however, TC negatively affected the bond strength values for all the groups. Nanomechanical properties remained unchanged when comparing immediate and after TC results (p > 0.05). Bleaching with BLG reduced significantly the dentin UTS, while all groups showed major decrease in UTS after the enzymatic challenge. Conclusions: Although violet LED was able to promote a bleaching effect, less color changes was observed when compared to BLG. None of the bleaching techniques effected the resin-bond strength or the nanomechanics of the hybrid layer. Violet LED did negatively effect dentin biostability as observed for BLG and it may promote less changes to the organic content of dentin. |
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Dental bleaching with violet LED: Effects on dentin color change, resin-dentin bond strength, hybrid layer nanohardness and dentinal collagen biostabilityBond strengthCollagenDental bleachingDentinNanohardnessBackground: The purpose of this study was to investigate the effect of a novel dental bleaching technique with Violet LED on enamel color change, bond strength and hybrid layer nanomechanical properties in resin-dentin restoration, and dentin biostability. Methods: A total of 125 bovine incisors were distributed into a control group, violet LED group (LED), and 35 % peroxide hydrogen bleaching gel (BLG) groups (n = 15). Three 45-minute sessions were performed for both bleaching procedures every week. Enamel color change (ΔE, ΔL, and Δb) was determined after every bleaching session. After color analysis, dentin was exposed for the resin-dentin bond strength analysis using microtensile test and evaluation of the nanomechanical properties at the hybrid layer (nanohardness). While half of the specimens were tested immediately, the remaining were evaluated after 10,000 thermal cycles (TC). Thirty additional teeth were used to investigate dentin ultimate tensile strength (UTS) after the bleaching treatments. UTS was evaluated before and after an enzymatic challenge. Two-way repeated measures ANOVA and Tukey's post-test were used for the statistical analysis (α = 0.05). Results: Enamel bleaching effect was observed in the LED and BLG groups with significant alterations in the ΔE, ΔL, and Δb in the BLG group. No difference was observed in the resin-dentin bond strength among the groups (p > 0.05), however, TC negatively affected the bond strength values for all the groups. Nanomechanical properties remained unchanged when comparing immediate and after TC results (p > 0.05). Bleaching with BLG reduced significantly the dentin UTS, while all groups showed major decrease in UTS after the enzymatic challenge. Conclusions: Although violet LED was able to promote a bleaching effect, less color changes was observed when compared to BLG. None of the bleaching techniques effected the resin-bond strength or the nanomechanics of the hybrid layer. Violet LED did negatively effect dentin biostability as observed for BLG and it may promote less changes to the organic content of dentin.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Department of Restorative Dentistry Araçatuba School of Dentistry São Paulo State University (UNESP) Rua José Bonifácio 1193, Postal code 16015-050Department of Dental Materials and Prosthodontics Araçatuba School of Dentistry São Paulo State University (UNESP) Rua José Bonifácio 1193, Postal code 16015-050Department of Engineering and Exact Sciences Federal University of Paraná Rua Pioneiro 2153, Postal code 85950-00Department of Restorative Dentistry College of Dentistry University of Illinois at Chicago, 801 South Paulina Street, Room 531Department of Restorative Dentistry Araçatuba School of Dentistry São Paulo State University (UNESP) Rua José Bonifácio 1193, Postal code 16015-050Department of Dental Materials and Prosthodontics Araçatuba School of Dentistry São Paulo State University (UNESP) Rua José Bonifácio 1193, Postal code 16015-050CNPq: 304572/2016-0Universidade Estadual Paulista (Unesp)Rua Pioneiro 2153University of Illinois at ChicagoBarboza, Ana Carolina Souza [UNESP]dos Santos, Paulo Henrique [UNESP]do Vale, Luana Ribeiro [UNESP]de Oliveira Gallinari, Marjorie [UNESP]Assmann, AndréVidal, Cristina Mattos PimentaFagundes, Ticiane Cestari [UNESP]Briso, André Luiz Fraga [UNESP]2021-06-25T10:48:03Z2021-06-25T10:48:03Z2021-03-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1016/j.pdpdt.2020.102141Photodiagnosis and Photodynamic Therapy, v. 33.1873-15971572-1000http://hdl.handle.net/11449/20704210.1016/j.pdpdt.2020.1021412-s2.0-85098504538Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPhotodiagnosis and Photodynamic Therapyinfo:eu-repo/semantics/openAccess2021-10-23T16:01:19Zoai:repositorio.unesp.br:11449/207042Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462021-10-23T16:01:19Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Dental bleaching with violet LED: Effects on dentin color change, resin-dentin bond strength, hybrid layer nanohardness and dentinal collagen biostability |
title |
Dental bleaching with violet LED: Effects on dentin color change, resin-dentin bond strength, hybrid layer nanohardness and dentinal collagen biostability |
spellingShingle |
Dental bleaching with violet LED: Effects on dentin color change, resin-dentin bond strength, hybrid layer nanohardness and dentinal collagen biostability Barboza, Ana Carolina Souza [UNESP] Bond strength Collagen Dental bleaching Dentin Nanohardness |
title_short |
Dental bleaching with violet LED: Effects on dentin color change, resin-dentin bond strength, hybrid layer nanohardness and dentinal collagen biostability |
title_full |
Dental bleaching with violet LED: Effects on dentin color change, resin-dentin bond strength, hybrid layer nanohardness and dentinal collagen biostability |
title_fullStr |
Dental bleaching with violet LED: Effects on dentin color change, resin-dentin bond strength, hybrid layer nanohardness and dentinal collagen biostability |
title_full_unstemmed |
Dental bleaching with violet LED: Effects on dentin color change, resin-dentin bond strength, hybrid layer nanohardness and dentinal collagen biostability |
title_sort |
Dental bleaching with violet LED: Effects on dentin color change, resin-dentin bond strength, hybrid layer nanohardness and dentinal collagen biostability |
author |
Barboza, Ana Carolina Souza [UNESP] |
author_facet |
Barboza, Ana Carolina Souza [UNESP] dos Santos, Paulo Henrique [UNESP] do Vale, Luana Ribeiro [UNESP] de Oliveira Gallinari, Marjorie [UNESP] Assmann, André Vidal, Cristina Mattos Pimenta Fagundes, Ticiane Cestari [UNESP] Briso, André Luiz Fraga [UNESP] |
author_role |
author |
author2 |
dos Santos, Paulo Henrique [UNESP] do Vale, Luana Ribeiro [UNESP] de Oliveira Gallinari, Marjorie [UNESP] Assmann, André Vidal, Cristina Mattos Pimenta Fagundes, Ticiane Cestari [UNESP] Briso, André Luiz Fraga [UNESP] |
author2_role |
author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Rua Pioneiro 2153 University of Illinois at Chicago |
dc.contributor.author.fl_str_mv |
Barboza, Ana Carolina Souza [UNESP] dos Santos, Paulo Henrique [UNESP] do Vale, Luana Ribeiro [UNESP] de Oliveira Gallinari, Marjorie [UNESP] Assmann, André Vidal, Cristina Mattos Pimenta Fagundes, Ticiane Cestari [UNESP] Briso, André Luiz Fraga [UNESP] |
dc.subject.por.fl_str_mv |
Bond strength Collagen Dental bleaching Dentin Nanohardness |
topic |
Bond strength Collagen Dental bleaching Dentin Nanohardness |
description |
Background: The purpose of this study was to investigate the effect of a novel dental bleaching technique with Violet LED on enamel color change, bond strength and hybrid layer nanomechanical properties in resin-dentin restoration, and dentin biostability. Methods: A total of 125 bovine incisors were distributed into a control group, violet LED group (LED), and 35 % peroxide hydrogen bleaching gel (BLG) groups (n = 15). Three 45-minute sessions were performed for both bleaching procedures every week. Enamel color change (ΔE, ΔL, and Δb) was determined after every bleaching session. After color analysis, dentin was exposed for the resin-dentin bond strength analysis using microtensile test and evaluation of the nanomechanical properties at the hybrid layer (nanohardness). While half of the specimens were tested immediately, the remaining were evaluated after 10,000 thermal cycles (TC). Thirty additional teeth were used to investigate dentin ultimate tensile strength (UTS) after the bleaching treatments. UTS was evaluated before and after an enzymatic challenge. Two-way repeated measures ANOVA and Tukey's post-test were used for the statistical analysis (α = 0.05). Results: Enamel bleaching effect was observed in the LED and BLG groups with significant alterations in the ΔE, ΔL, and Δb in the BLG group. No difference was observed in the resin-dentin bond strength among the groups (p > 0.05), however, TC negatively affected the bond strength values for all the groups. Nanomechanical properties remained unchanged when comparing immediate and after TC results (p > 0.05). Bleaching with BLG reduced significantly the dentin UTS, while all groups showed major decrease in UTS after the enzymatic challenge. Conclusions: Although violet LED was able to promote a bleaching effect, less color changes was observed when compared to BLG. None of the bleaching techniques effected the resin-bond strength or the nanomechanics of the hybrid layer. Violet LED did negatively effect dentin biostability as observed for BLG and it may promote less changes to the organic content of dentin. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-06-25T10:48:03Z 2021-06-25T10:48:03Z 2021-03-01 |
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/10.1016/j.pdpdt.2020.102141 Photodiagnosis and Photodynamic Therapy, v. 33. 1873-1597 1572-1000 http://hdl.handle.net/11449/207042 10.1016/j.pdpdt.2020.102141 2-s2.0-85098504538 |
url |
http://dx.doi.org/10.1016/j.pdpdt.2020.102141 http://hdl.handle.net/11449/207042 |
identifier_str_mv |
Photodiagnosis and Photodynamic Therapy, v. 33. 1873-1597 1572-1000 10.1016/j.pdpdt.2020.102141 2-s2.0-85098504538 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Photodiagnosis and Photodynamic Therapy |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus 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 |
|
_version_ |
1803649415169179648 |