Evaluation of human enamel permeability exposed to bleaching agents
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Brazilian journal of oral sciences (Online) |
Texto Completo: | https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8641083 |
Resumo: | Aim: To evaluate the human enamel permeability after different external bleaching techniques. Methods: The coronal portions of 20 maxillary human incisors were covered with an acid resistant varnish, except the labial surface, to prevent dye penetration of silver nitrate. The specimens were divided randomly into four groups (n=5) according to the bleaching treatments: Group 1 (G1) - without bleaching agent (control group), Group 2 (G2) - 35% hydrogen peroxide (HP) – one session of three 10-min applications, Group 3 (G3) - 35% HP – 2 sessions of three 10-min applications, and Group 4 (G4) - 6% HP – 14 days (1h/day). G1 was exposed to artificial saliva only and in the other groups the bleaching agents were applied following the manufacturers’ recommendations. After bleaching, teeth were immersed in a 50% silver nitrate solution for 2 h and photodeveloped for 16 h. Then, three longitudinal slices of each tooth were photographed by an optical microscope (100x). The degree of dye penetration was analyzed in the middle third of the dental crowns using a 0 to 4 score system (0= no dye penetration, 1= less than half the enamel thickness, 2= half of the enamel thickness, 3= full extent of enamel without reaching the dentin, and 4= tracer agent reaching dentin). The data were analyzed statistically by the KruskalWallis and Dunn tests (α=0.05). Results: The median (1st/3rd interquartiles) ranges were: G1: 0(0/0), G2: 2(2/3), G3: 3(3/3) and G4: 3(3/3). G2, G3 and G4 showed significantly higher dye penetration compared with G1 (p=0.0017). Conclusions: The use of bleaching agents increased dental enamel permeability, regardless of the bleaching technique. |
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oai:ojs.periodicos.sbu.unicamp.br:article/8641083 |
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UNICAMP-8 |
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Brazilian journal of oral sciences (Online) |
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Evaluation of human enamel permeability exposed to bleaching agentsDental enamelBleaching agentsPermeabilityOdontologiaAim: To evaluate the human enamel permeability after different external bleaching techniques. Methods: The coronal portions of 20 maxillary human incisors were covered with an acid resistant varnish, except the labial surface, to prevent dye penetration of silver nitrate. The specimens were divided randomly into four groups (n=5) according to the bleaching treatments: Group 1 (G1) - without bleaching agent (control group), Group 2 (G2) - 35% hydrogen peroxide (HP) – one session of three 10-min applications, Group 3 (G3) - 35% HP – 2 sessions of three 10-min applications, and Group 4 (G4) - 6% HP – 14 days (1h/day). G1 was exposed to artificial saliva only and in the other groups the bleaching agents were applied following the manufacturers’ recommendations. After bleaching, teeth were immersed in a 50% silver nitrate solution for 2 h and photodeveloped for 16 h. Then, three longitudinal slices of each tooth were photographed by an optical microscope (100x). The degree of dye penetration was analyzed in the middle third of the dental crowns using a 0 to 4 score system (0= no dye penetration, 1= less than half the enamel thickness, 2= half of the enamel thickness, 3= full extent of enamel without reaching the dentin, and 4= tracer agent reaching dentin). The data were analyzed statistically by the KruskalWallis and Dunn tests (α=0.05). Results: The median (1st/3rd interquartiles) ranges were: G1: 0(0/0), G2: 2(2/3), G3: 3(3/3) and G4: 3(3/3). G2, G3 and G4 showed significantly higher dye penetration compared with G1 (p=0.0017). Conclusions: The use of bleaching agents increased dental enamel permeability, regardless of the bleaching technique.Universidade Estadual de Campinas2015-10-16info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttps://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8641083Brazilian Journal of Oral Sciences; v. 12 n. 2 (2013): Abr./Jun.; 114-118Brazilian Journal of Oral Sciences; Vol. 12 No. 2 (2013): Abr./Jun.; 114-1181677-3225reponame:Brazilian journal of oral sciences (Online)instname:Universidade Estadual de Campinas (UNICAMP)instacron:UNICAMPporhttps://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8641083/8595Copyright (c) 2015 Diego Horning, Giovana Mongruel Gomes, Bruna Fortes Bittencourt, Lucas Manuel Ruiz, Alessandra Reis, Osnara Maria Mongruel Gomeshttps://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessHorning, DiegoGomes, Giovana MongruelBittencourt, Bruna FortesRuiz, Lucas ManuelReis, AlessandraGomes, Osnara Maria Mongruel2023-09-29T13:26:12Zoai:ojs.periodicos.sbu.unicamp.br:article/8641083Revistahttps://periodicos.sbu.unicamp.br/ojs/index.php/bjos/PUBhttps://periodicos.sbu.unicamp.br/ojs/index.php/bjos/oaibrjorals@fop.unicamp.br||brjorals@fop.unicamp.br1677-32251677-3217opendoar:2023-09-29T13:26:12Brazilian journal of oral sciences (Online) - Universidade Estadual de Campinas (UNICAMP)false |
dc.title.none.fl_str_mv |
Evaluation of human enamel permeability exposed to bleaching agents |
title |
Evaluation of human enamel permeability exposed to bleaching agents |
spellingShingle |
Evaluation of human enamel permeability exposed to bleaching agents Horning, Diego Dental enamel Bleaching agents Permeability Odontologia |
title_short |
Evaluation of human enamel permeability exposed to bleaching agents |
title_full |
Evaluation of human enamel permeability exposed to bleaching agents |
title_fullStr |
Evaluation of human enamel permeability exposed to bleaching agents |
title_full_unstemmed |
Evaluation of human enamel permeability exposed to bleaching agents |
title_sort |
Evaluation of human enamel permeability exposed to bleaching agents |
author |
Horning, Diego |
author_facet |
Horning, Diego Gomes, Giovana Mongruel Bittencourt, Bruna Fortes Ruiz, Lucas Manuel Reis, Alessandra Gomes, Osnara Maria Mongruel |
author_role |
author |
author2 |
Gomes, Giovana Mongruel Bittencourt, Bruna Fortes Ruiz, Lucas Manuel Reis, Alessandra Gomes, Osnara Maria Mongruel |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Horning, Diego Gomes, Giovana Mongruel Bittencourt, Bruna Fortes Ruiz, Lucas Manuel Reis, Alessandra Gomes, Osnara Maria Mongruel |
dc.subject.por.fl_str_mv |
Dental enamel Bleaching agents Permeability Odontologia |
topic |
Dental enamel Bleaching agents Permeability Odontologia |
description |
Aim: To evaluate the human enamel permeability after different external bleaching techniques. Methods: The coronal portions of 20 maxillary human incisors were covered with an acid resistant varnish, except the labial surface, to prevent dye penetration of silver nitrate. The specimens were divided randomly into four groups (n=5) according to the bleaching treatments: Group 1 (G1) - without bleaching agent (control group), Group 2 (G2) - 35% hydrogen peroxide (HP) – one session of three 10-min applications, Group 3 (G3) - 35% HP – 2 sessions of three 10-min applications, and Group 4 (G4) - 6% HP – 14 days (1h/day). G1 was exposed to artificial saliva only and in the other groups the bleaching agents were applied following the manufacturers’ recommendations. After bleaching, teeth were immersed in a 50% silver nitrate solution for 2 h and photodeveloped for 16 h. Then, three longitudinal slices of each tooth were photographed by an optical microscope (100x). The degree of dye penetration was analyzed in the middle third of the dental crowns using a 0 to 4 score system (0= no dye penetration, 1= less than half the enamel thickness, 2= half of the enamel thickness, 3= full extent of enamel without reaching the dentin, and 4= tracer agent reaching dentin). The data were analyzed statistically by the KruskalWallis and Dunn tests (α=0.05). Results: The median (1st/3rd interquartiles) ranges were: G1: 0(0/0), G2: 2(2/3), G3: 3(3/3) and G4: 3(3/3). G2, G3 and G4 showed significantly higher dye penetration compared with G1 (p=0.0017). Conclusions: The use of bleaching agents increased dental enamel permeability, regardless of the bleaching technique. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-10-16 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8641083 |
url |
https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8641083 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8641083/8595 |
dc.rights.driver.fl_str_mv |
https://creativecommons.org/licenses/by/4.0 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by/4.0 |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Universidade Estadual de Campinas |
publisher.none.fl_str_mv |
Universidade Estadual de Campinas |
dc.source.none.fl_str_mv |
Brazilian Journal of Oral Sciences; v. 12 n. 2 (2013): Abr./Jun.; 114-118 Brazilian Journal of Oral Sciences; Vol. 12 No. 2 (2013): Abr./Jun.; 114-118 1677-3225 reponame:Brazilian journal of oral sciences (Online) instname:Universidade Estadual de Campinas (UNICAMP) instacron:UNICAMP |
instname_str |
Universidade Estadual de Campinas (UNICAMP) |
instacron_str |
UNICAMP |
institution |
UNICAMP |
reponame_str |
Brazilian journal of oral sciences (Online) |
collection |
Brazilian journal of oral sciences (Online) |
repository.name.fl_str_mv |
Brazilian journal of oral sciences (Online) - Universidade Estadual de Campinas (UNICAMP) |
repository.mail.fl_str_mv |
brjorals@fop.unicamp.br||brjorals@fop.unicamp.br |
_version_ |
1800216398753955840 |