Influence of voids in the hybrid layer based on self-etching adhesive systems: a 3-D FE analysis
Autor(a) principal: | |
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Data de Publicação: | 2009 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Journal of applied oral science (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572009000700005 |
Resumo: | The presence of porosities at the dentin/adhesive interface has been observed with the use of new generation dentin bonding systems. These porosities tend to contradict the concept that etching and hybridization processes occur equally and simultaneously. Therefore, the aim of this study was to evaluate the micromechanical behavior of the hybrid layer (HL) with voids based on a self-etching adhesive system using 3-D finite element (FE) analysis. MATERIAL AND METHODS: Three FE models (Mr) were built: Mr, dentin specimen (41x41x82 μm) with a regular and perfect (i.e. pore-free) HL based on a self-etching adhesive system, restored with composite resin; Mp, similar to M, but containing 25% (v/v) voids in the HL; Mpp, similar to Mr, but containing 50% (v/v) voids in the HL. A tensile load (0.03N) was applied on top of the composite resin. The stress field was obtained by using Ansys Workbench 10.0. The nodes of the base of the specimen were constrained in the x, y and z axes. The maximum principal stress (σmax) was obtained for all structures at the dentin/adhesive interface. RESULTS: The Mpp showed the highest peak of σmax in the HL (32.2 MPa), followed by Mp (30 MPa) and Mr (28.4 MPa). The stress concentration in the peritubular dentin was high in all models (120 MPa). All other structures positioned far from voids showed similar increase of stress. CONCLUSION: Voids incorporated into the HL raised the σmax in this region by 13.5%. This behavior might be responsible for lower bond strengths of self-etching and single-bottle adhesives, as reported in the literature. |
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Journal of applied oral science (Online) |
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Influence of voids in the hybrid layer based on self-etching adhesive systems: a 3-D FE analysisHybrid layerVoidsDentinFinite element analysisThe presence of porosities at the dentin/adhesive interface has been observed with the use of new generation dentin bonding systems. These porosities tend to contradict the concept that etching and hybridization processes occur equally and simultaneously. Therefore, the aim of this study was to evaluate the micromechanical behavior of the hybrid layer (HL) with voids based on a self-etching adhesive system using 3-D finite element (FE) analysis. MATERIAL AND METHODS: Three FE models (Mr) were built: Mr, dentin specimen (41x41x82 μm) with a regular and perfect (i.e. pore-free) HL based on a self-etching adhesive system, restored with composite resin; Mp, similar to M, but containing 25% (v/v) voids in the HL; Mpp, similar to Mr, but containing 50% (v/v) voids in the HL. A tensile load (0.03N) was applied on top of the composite resin. The stress field was obtained by using Ansys Workbench 10.0. The nodes of the base of the specimen were constrained in the x, y and z axes. The maximum principal stress (σmax) was obtained for all structures at the dentin/adhesive interface. RESULTS: The Mpp showed the highest peak of σmax in the HL (32.2 MPa), followed by Mp (30 MPa) and Mr (28.4 MPa). The stress concentration in the peritubular dentin was high in all models (120 MPa). All other structures positioned far from voids showed similar increase of stress. CONCLUSION: Voids incorporated into the HL raised the σmax in this region by 13.5%. This behavior might be responsible for lower bond strengths of self-etching and single-bottle adhesives, as reported in the literature.Faculdade De Odontologia De Bauru - USP2009-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572009000700005Journal of Applied Oral Science v.17 n.spe 2009reponame:Journal of applied oral science (Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/S1678-77572009000700005info:eu-repo/semantics/openAccessMartini,Ana PaulaAnchieta,Rodolfo BrunieraRocha,Eduardo PassosFreitas Junior,Amilcar ChagasAlmeida,Erika Oliveira deSundfeld,Renato HermanLuersen,Marco Antonioeng2011-03-04T00:00:00Zoai:scielo:S1678-77572009000700005Revistahttp://www.scielo.br/jaosPUBhttps://old.scielo.br/oai/scielo-oai.php||jaos@usp.br1678-77651678-7757opendoar:2011-03-04T00:00Journal of applied oral science (Online) - Universidade de São Paulo (USP)false |
dc.title.none.fl_str_mv |
Influence of voids in the hybrid layer based on self-etching adhesive systems: a 3-D FE analysis |
title |
Influence of voids in the hybrid layer based on self-etching adhesive systems: a 3-D FE analysis |
spellingShingle |
Influence of voids in the hybrid layer based on self-etching adhesive systems: a 3-D FE analysis Martini,Ana Paula Hybrid layer Voids Dentin Finite element analysis |
title_short |
Influence of voids in the hybrid layer based on self-etching adhesive systems: a 3-D FE analysis |
title_full |
Influence of voids in the hybrid layer based on self-etching adhesive systems: a 3-D FE analysis |
title_fullStr |
Influence of voids in the hybrid layer based on self-etching adhesive systems: a 3-D FE analysis |
title_full_unstemmed |
Influence of voids in the hybrid layer based on self-etching adhesive systems: a 3-D FE analysis |
title_sort |
Influence of voids in the hybrid layer based on self-etching adhesive systems: a 3-D FE analysis |
author |
Martini,Ana Paula |
author_facet |
Martini,Ana Paula Anchieta,Rodolfo Bruniera Rocha,Eduardo Passos Freitas Junior,Amilcar Chagas Almeida,Erika Oliveira de Sundfeld,Renato Herman Luersen,Marco Antonio |
author_role |
author |
author2 |
Anchieta,Rodolfo Bruniera Rocha,Eduardo Passos Freitas Junior,Amilcar Chagas Almeida,Erika Oliveira de Sundfeld,Renato Herman Luersen,Marco Antonio |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Martini,Ana Paula Anchieta,Rodolfo Bruniera Rocha,Eduardo Passos Freitas Junior,Amilcar Chagas Almeida,Erika Oliveira de Sundfeld,Renato Herman Luersen,Marco Antonio |
dc.subject.por.fl_str_mv |
Hybrid layer Voids Dentin Finite element analysis |
topic |
Hybrid layer Voids Dentin Finite element analysis |
description |
The presence of porosities at the dentin/adhesive interface has been observed with the use of new generation dentin bonding systems. These porosities tend to contradict the concept that etching and hybridization processes occur equally and simultaneously. Therefore, the aim of this study was to evaluate the micromechanical behavior of the hybrid layer (HL) with voids based on a self-etching adhesive system using 3-D finite element (FE) analysis. MATERIAL AND METHODS: Three FE models (Mr) were built: Mr, dentin specimen (41x41x82 μm) with a regular and perfect (i.e. pore-free) HL based on a self-etching adhesive system, restored with composite resin; Mp, similar to M, but containing 25% (v/v) voids in the HL; Mpp, similar to Mr, but containing 50% (v/v) voids in the HL. A tensile load (0.03N) was applied on top of the composite resin. The stress field was obtained by using Ansys Workbench 10.0. The nodes of the base of the specimen were constrained in the x, y and z axes. The maximum principal stress (σmax) was obtained for all structures at the dentin/adhesive interface. RESULTS: The Mpp showed the highest peak of σmax in the HL (32.2 MPa), followed by Mp (30 MPa) and Mr (28.4 MPa). The stress concentration in the peritubular dentin was high in all models (120 MPa). All other structures positioned far from voids showed similar increase of stress. CONCLUSION: Voids incorporated into the HL raised the σmax in this region by 13.5%. This behavior might be responsible for lower bond strengths of self-etching and single-bottle adhesives, as reported in the literature. |
publishDate |
2009 |
dc.date.none.fl_str_mv |
2009-01-01 |
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=S1678-77572009000700005 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572009000700005 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1678-77572009000700005 |
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 |
Faculdade De Odontologia De Bauru - USP |
publisher.none.fl_str_mv |
Faculdade De Odontologia De Bauru - USP |
dc.source.none.fl_str_mv |
Journal of Applied Oral Science v.17 n.spe 2009 reponame:Journal of applied oral science (Online) instname:Universidade de São Paulo (USP) instacron:USP |
instname_str |
Universidade de São Paulo (USP) |
instacron_str |
USP |
institution |
USP |
reponame_str |
Journal of applied oral science (Online) |
collection |
Journal of applied oral science (Online) |
repository.name.fl_str_mv |
Journal of applied oral science (Online) - Universidade de São Paulo (USP) |
repository.mail.fl_str_mv |
||jaos@usp.br |
_version_ |
1748936435692470272 |