Thickness and nanomechanical properties of protective layer formed by TiF4 varnish on enamel after erosion
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Brazilian Oral Research |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242016000100264 |
Resumo: | Abstract The layer formed by fluoride compounds on tooth surface is important to protect the underlying enamel from erosion. However, there is no investigation into the properties of protective layer formed by NaF and TiF4 varnishes on eroded enamel. This study aimed to evaluate the thickness, topography, nanohardness, and elastic modulus of the protective layer formed by NaF and TiF4 varnishes on enamel after erosion using nanoindentation and atomic force microscopy (AFM). Human enamel specimens were sorted into control, NaF, and TiF4 varnish groups (n = 10). The initial nanohardness and elastic modulus values were obtained and varnishes were applied to the enamel and submitted to erosive challenge (10 cycles: 5 s cola drink/5 s artificial saliva). Thereafter, nanohardness and elastic modulus were measured. Both topography and thickness were evaluated by AFM. The data were subjected to ANOVA, Tukey’s test and Student’s t test (α = 0.05). After erosion, TiF4 showed a thicker protective layer compared to the NaF group and nanohardness and elastic modulus values were significantly lower than those of the control group. It was not possible to measure nanohardness and elastic modulus in the NaF group due to the thin protective layer formed. AFM showed globular deposits, which completely covered the eroded surface in the TiF4 group. After erosive challenge, the protective layer formed by TiF4 varnish showed significant properties and it was thicker than the layer formed by NaF varnish. |
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Thickness and nanomechanical properties of protective layer formed by TiF4 varnish on enamel after erosionTooth ErosionDental EnamelMicroscopyAtomic ForceAbstract The layer formed by fluoride compounds on tooth surface is important to protect the underlying enamel from erosion. However, there is no investigation into the properties of protective layer formed by NaF and TiF4 varnishes on eroded enamel. This study aimed to evaluate the thickness, topography, nanohardness, and elastic modulus of the protective layer formed by NaF and TiF4 varnishes on enamel after erosion using nanoindentation and atomic force microscopy (AFM). Human enamel specimens were sorted into control, NaF, and TiF4 varnish groups (n = 10). The initial nanohardness and elastic modulus values were obtained and varnishes were applied to the enamel and submitted to erosive challenge (10 cycles: 5 s cola drink/5 s artificial saliva). Thereafter, nanohardness and elastic modulus were measured. Both topography and thickness were evaluated by AFM. The data were subjected to ANOVA, Tukey’s test and Student’s t test (α = 0.05). After erosion, TiF4 showed a thicker protective layer compared to the NaF group and nanohardness and elastic modulus values were significantly lower than those of the control group. It was not possible to measure nanohardness and elastic modulus in the NaF group due to the thin protective layer formed. AFM showed globular deposits, which completely covered the eroded surface in the TiF4 group. After erosive challenge, the protective layer formed by TiF4 varnish showed significant properties and it was thicker than the layer formed by NaF varnish.Sociedade Brasileira de Pesquisa Odontológica - SBPqO2016-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242016000100264Brazilian Oral Research v.30 n.1 2016reponame:Brazilian Oral Researchinstname:Sociedade Brasileira de Pesquisa Odontológica (SBPqO)instacron:SBPQO10.1590/1807-3107BOR-2016.vol30.0075info:eu-repo/semantics/openAccessMEDEIROS,Maria Isabel Dantas deCARLO,Hugo LemesLACERDA-SANTOS,RogérioLIMA,Bruno Alessandro Guedes deSOUSA,Frederico Barbosa deRODRIGUES,Jonas AlmeidaCARVALHO,Fabiola Galbiatti deeng2016-08-15T00:00:00Zoai:scielo:S1806-83242016000100264Revistahttps://www.scielo.br/j/bor/https://old.scielo.br/oai/scielo-oai.phppob@edu.usp.br||bor@sbpqo.org.br1807-31071806-8324opendoar:2016-08-15T00:00Brazilian Oral Research - Sociedade Brasileira de Pesquisa Odontológica (SBPqO)false |
dc.title.none.fl_str_mv |
Thickness and nanomechanical properties of protective layer formed by TiF4 varnish on enamel after erosion |
title |
Thickness and nanomechanical properties of protective layer formed by TiF4 varnish on enamel after erosion |
spellingShingle |
Thickness and nanomechanical properties of protective layer formed by TiF4 varnish on enamel after erosion MEDEIROS,Maria Isabel Dantas de Tooth Erosion Dental Enamel Microscopy Atomic Force |
title_short |
Thickness and nanomechanical properties of protective layer formed by TiF4 varnish on enamel after erosion |
title_full |
Thickness and nanomechanical properties of protective layer formed by TiF4 varnish on enamel after erosion |
title_fullStr |
Thickness and nanomechanical properties of protective layer formed by TiF4 varnish on enamel after erosion |
title_full_unstemmed |
Thickness and nanomechanical properties of protective layer formed by TiF4 varnish on enamel after erosion |
title_sort |
Thickness and nanomechanical properties of protective layer formed by TiF4 varnish on enamel after erosion |
author |
MEDEIROS,Maria Isabel Dantas de |
author_facet |
MEDEIROS,Maria Isabel Dantas de CARLO,Hugo Lemes LACERDA-SANTOS,Rogério LIMA,Bruno Alessandro Guedes de SOUSA,Frederico Barbosa de RODRIGUES,Jonas Almeida CARVALHO,Fabiola Galbiatti de |
author_role |
author |
author2 |
CARLO,Hugo Lemes LACERDA-SANTOS,Rogério LIMA,Bruno Alessandro Guedes de SOUSA,Frederico Barbosa de RODRIGUES,Jonas Almeida CARVALHO,Fabiola Galbiatti de |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
MEDEIROS,Maria Isabel Dantas de CARLO,Hugo Lemes LACERDA-SANTOS,Rogério LIMA,Bruno Alessandro Guedes de SOUSA,Frederico Barbosa de RODRIGUES,Jonas Almeida CARVALHO,Fabiola Galbiatti de |
dc.subject.por.fl_str_mv |
Tooth Erosion Dental Enamel Microscopy Atomic Force |
topic |
Tooth Erosion Dental Enamel Microscopy Atomic Force |
description |
Abstract The layer formed by fluoride compounds on tooth surface is important to protect the underlying enamel from erosion. However, there is no investigation into the properties of protective layer formed by NaF and TiF4 varnishes on eroded enamel. This study aimed to evaluate the thickness, topography, nanohardness, and elastic modulus of the protective layer formed by NaF and TiF4 varnishes on enamel after erosion using nanoindentation and atomic force microscopy (AFM). Human enamel specimens were sorted into control, NaF, and TiF4 varnish groups (n = 10). The initial nanohardness and elastic modulus values were obtained and varnishes were applied to the enamel and submitted to erosive challenge (10 cycles: 5 s cola drink/5 s artificial saliva). Thereafter, nanohardness and elastic modulus were measured. Both topography and thickness were evaluated by AFM. The data were subjected to ANOVA, Tukey’s test and Student’s t test (α = 0.05). After erosion, TiF4 showed a thicker protective layer compared to the NaF group and nanohardness and elastic modulus values were significantly lower than those of the control group. It was not possible to measure nanohardness and elastic modulus in the NaF group due to the thin protective layer formed. AFM showed globular deposits, which completely covered the eroded surface in the TiF4 group. After erosive challenge, the protective layer formed by TiF4 varnish showed significant properties and it was thicker than the layer formed by NaF varnish. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242016000100264 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242016000100264 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/1807-3107BOR-2016.vol30.0075 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Pesquisa Odontológica - SBPqO |
publisher.none.fl_str_mv |
Sociedade Brasileira de Pesquisa Odontológica - SBPqO |
dc.source.none.fl_str_mv |
Brazilian Oral Research v.30 n.1 2016 reponame:Brazilian Oral Research instname:Sociedade Brasileira de Pesquisa Odontológica (SBPqO) instacron:SBPQO |
instname_str |
Sociedade Brasileira de Pesquisa Odontológica (SBPqO) |
instacron_str |
SBPQO |
institution |
SBPQO |
reponame_str |
Brazilian Oral Research |
collection |
Brazilian Oral Research |
repository.name.fl_str_mv |
Brazilian Oral Research - Sociedade Brasileira de Pesquisa Odontológica (SBPqO) |
repository.mail.fl_str_mv |
pob@edu.usp.br||bor@sbpqo.org.br |
_version_ |
1750318324767522816 |