Localized mechanics of dentin self-etching adhesive system
Autor(a) principal: | |
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Data de Publicação: | 2007 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/S1678-77572007000400015 http://hdl.handle.net/11449/34317 |
Resumo: | The bond strength of composite resins (CRs) to dentin is influenced by the interfacial microstructure of the hybrid layer (HL) and the resin tags (TAG). The contemporary self-etching primer adhesive systems overcame the inconvenient of the etch-and-rinse protocol. Studies, however, have demonstrated that HL thickness and TAG length vary according to the wetting time and additional use of acid-etching prior to self-etching primers. This study investigated the localized stress distribution in the HL and the dentin/adhesive interface. Two HL thicknesses (3 or 6 mu m), two TAG lengths (13 or 17 mu m) and two loading conditions (perpendicular and oblique-25 degrees) were investigated by the finite element (FE) analysis. Five two-dimensional FE models (M) of a dentin specimen restored with CR (38 x 64 mu m) were constructed: M1 - no HL and no TAG; M2 - 3 mu m of HL and 13 mu m of TAG; M3 - 3 mu m of HL and 17 mu m of TAG; M4 - 6 mu m of HL and 13 mu m of TAG; and M5 - 6 mu m of HL and 17 mu m of TAG. Two distributed loadings (L) (20N) were applied on CR surface: L1 - perpendicular, and L2 - oblique (25 degrees). Fixed interfacial conditions were assigned on the border of the dentin specimen. Ansys 10.0 (Ansys (R), Houston, PA, USA) software was used to calculate the stress fields. The peak of von Mises (sigma(vM)) and maximum principal stress (sigma(max)) was higher in L2 than in L1. Microstructures (HL and TAG) had no effect on local stresses for L1. Decreasing HL decreased sigma(vM) and sigma(max) in all structures for L2, but the TAG length had influence only on the peributular dentin. The thickness of HL had more influence on the sigma(vM) and sigma(max) than TAG length. The peritubular dentin and its adjacent structures showed the highest sigma(vM) and sigma(max), mainly in the oblique loading. |
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Localized mechanics of dentin self-etching adhesive systemdentin-bonding agentsfinite element analysisdentindental acid etchingThe bond strength of composite resins (CRs) to dentin is influenced by the interfacial microstructure of the hybrid layer (HL) and the resin tags (TAG). The contemporary self-etching primer adhesive systems overcame the inconvenient of the etch-and-rinse protocol. Studies, however, have demonstrated that HL thickness and TAG length vary according to the wetting time and additional use of acid-etching prior to self-etching primers. This study investigated the localized stress distribution in the HL and the dentin/adhesive interface. Two HL thicknesses (3 or 6 mu m), two TAG lengths (13 or 17 mu m) and two loading conditions (perpendicular and oblique-25 degrees) were investigated by the finite element (FE) analysis. Five two-dimensional FE models (M) of a dentin specimen restored with CR (38 x 64 mu m) were constructed: M1 - no HL and no TAG; M2 - 3 mu m of HL and 13 mu m of TAG; M3 - 3 mu m of HL and 17 mu m of TAG; M4 - 6 mu m of HL and 13 mu m of TAG; and M5 - 6 mu m of HL and 17 mu m of TAG. Two distributed loadings (L) (20N) were applied on CR surface: L1 - perpendicular, and L2 - oblique (25 degrees). Fixed interfacial conditions were assigned on the border of the dentin specimen. Ansys 10.0 (Ansys (R), Houston, PA, USA) software was used to calculate the stress fields. The peak of von Mises (sigma(vM)) and maximum principal stress (sigma(max)) was higher in L2 than in L1. Microstructures (HL and TAG) had no effect on local stresses for L1. Decreasing HL decreased sigma(vM) and sigma(max) in all structures for L2, but the TAG length had influence only on the peributular dentin. The thickness of HL had more influence on the sigma(vM) and sigma(max) than TAG length. The peritubular dentin and its adjacent structures showed the highest sigma(vM) and sigma(max), mainly in the oblique loading.São Paulo State Univ, Dent Sch Aracatuba, Aracatuba, SP, BrazilSão Paulo State Univ, Dent Sch Aracatuba, Dept Dent Mat & Prosthodont, Aracatuba, SP, BrazilUniv N Carolina, Dept Orthodont, Chapel Hill, NC USASão Paulo State Univ, Dept Restorat Dent, Dent Sch Aracatuba, Aracatuba, SP, BrazilSão Paulo State Univ, Dent Sch Aracatuba, Aracatuba, SP, BrazilSão Paulo State Univ, Dent Sch Aracatuba, Dept Dent Mat & Prosthodont, Aracatuba, SP, BrazilSão Paulo State Univ, Dept Restorat Dent, Dent Sch Aracatuba, Aracatuba, SP, BrazilUniversidade de São Paulo (USP), Faculdade de Odontologia de BauruUniversidade Estadual Paulista (Unesp)Univ N CarolinaAnchieta, Rodolfo Bruniera [UNESP]Rocha, Eduardo Passos [UNESP]Ko, Ching-ChangSundfeld, Renato Herman [UNESP]Martin, Manoel [UNESP]Archangelo, Carlos Marcelo [UNESP]2014-05-20T15:23:33Z2014-05-20T15:23:33Z2007-07-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article321-326application/pdfhttp://dx.doi.org/10.1590/S1678-77572007000400015Journal of Applied Oral Science. Bauru-sp: Univ São Paulo Fac Odontologia Bauru, v. 15, n. 4, p. 321-326, 2007.1678-7757http://hdl.handle.net/11449/3431710.1590/S1678-77572007000400015S1678-77572007000400015WOS:000256794400015WOS000256794400015.pdf33833922870398209693348671473011Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of Applied Oral Science1.7090,645info:eu-repo/semantics/openAccess2024-01-10T06:27:51Zoai:repositorio.unesp.br:11449/34317Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T22:37:44.653356Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Localized mechanics of dentin self-etching adhesive system |
title |
Localized mechanics of dentin self-etching adhesive system |
spellingShingle |
Localized mechanics of dentin self-etching adhesive system Anchieta, Rodolfo Bruniera [UNESP] dentin-bonding agents finite element analysis dentin dental acid etching |
title_short |
Localized mechanics of dentin self-etching adhesive system |
title_full |
Localized mechanics of dentin self-etching adhesive system |
title_fullStr |
Localized mechanics of dentin self-etching adhesive system |
title_full_unstemmed |
Localized mechanics of dentin self-etching adhesive system |
title_sort |
Localized mechanics of dentin self-etching adhesive system |
author |
Anchieta, Rodolfo Bruniera [UNESP] |
author_facet |
Anchieta, Rodolfo Bruniera [UNESP] Rocha, Eduardo Passos [UNESP] Ko, Ching-Chang Sundfeld, Renato Herman [UNESP] Martin, Manoel [UNESP] Archangelo, Carlos Marcelo [UNESP] |
author_role |
author |
author2 |
Rocha, Eduardo Passos [UNESP] Ko, Ching-Chang Sundfeld, Renato Herman [UNESP] Martin, Manoel [UNESP] Archangelo, Carlos Marcelo [UNESP] |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Univ N Carolina |
dc.contributor.author.fl_str_mv |
Anchieta, Rodolfo Bruniera [UNESP] Rocha, Eduardo Passos [UNESP] Ko, Ching-Chang Sundfeld, Renato Herman [UNESP] Martin, Manoel [UNESP] Archangelo, Carlos Marcelo [UNESP] |
dc.subject.por.fl_str_mv |
dentin-bonding agents finite element analysis dentin dental acid etching |
topic |
dentin-bonding agents finite element analysis dentin dental acid etching |
description |
The bond strength of composite resins (CRs) to dentin is influenced by the interfacial microstructure of the hybrid layer (HL) and the resin tags (TAG). The contemporary self-etching primer adhesive systems overcame the inconvenient of the etch-and-rinse protocol. Studies, however, have demonstrated that HL thickness and TAG length vary according to the wetting time and additional use of acid-etching prior to self-etching primers. This study investigated the localized stress distribution in the HL and the dentin/adhesive interface. Two HL thicknesses (3 or 6 mu m), two TAG lengths (13 or 17 mu m) and two loading conditions (perpendicular and oblique-25 degrees) were investigated by the finite element (FE) analysis. Five two-dimensional FE models (M) of a dentin specimen restored with CR (38 x 64 mu m) were constructed: M1 - no HL and no TAG; M2 - 3 mu m of HL and 13 mu m of TAG; M3 - 3 mu m of HL and 17 mu m of TAG; M4 - 6 mu m of HL and 13 mu m of TAG; and M5 - 6 mu m of HL and 17 mu m of TAG. Two distributed loadings (L) (20N) were applied on CR surface: L1 - perpendicular, and L2 - oblique (25 degrees). Fixed interfacial conditions were assigned on the border of the dentin specimen. Ansys 10.0 (Ansys (R), Houston, PA, USA) software was used to calculate the stress fields. The peak of von Mises (sigma(vM)) and maximum principal stress (sigma(max)) was higher in L2 than in L1. Microstructures (HL and TAG) had no effect on local stresses for L1. Decreasing HL decreased sigma(vM) and sigma(max) in all structures for L2, but the TAG length had influence only on the peributular dentin. The thickness of HL had more influence on the sigma(vM) and sigma(max) than TAG length. The peritubular dentin and its adjacent structures showed the highest sigma(vM) and sigma(max), mainly in the oblique loading. |
publishDate |
2007 |
dc.date.none.fl_str_mv |
2007-07-01 2014-05-20T15:23:33Z 2014-05-20T15:23:33Z |
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/S1678-77572007000400015 Journal of Applied Oral Science. Bauru-sp: Univ São Paulo Fac Odontologia Bauru, v. 15, n. 4, p. 321-326, 2007. 1678-7757 http://hdl.handle.net/11449/34317 10.1590/S1678-77572007000400015 S1678-77572007000400015 WOS:000256794400015 WOS000256794400015.pdf 3383392287039820 9693348671473011 |
url |
http://dx.doi.org/10.1590/S1678-77572007000400015 http://hdl.handle.net/11449/34317 |
identifier_str_mv |
Journal of Applied Oral Science. Bauru-sp: Univ São Paulo Fac Odontologia Bauru, v. 15, n. 4, p. 321-326, 2007. 1678-7757 10.1590/S1678-77572007000400015 S1678-77572007000400015 WOS:000256794400015 WOS000256794400015.pdf 3383392287039820 9693348671473011 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of Applied Oral Science 1.709 0,645 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
321-326 application/pdf |
dc.publisher.none.fl_str_mv |
Universidade de São Paulo (USP), Faculdade de Odontologia de Bauru |
publisher.none.fl_str_mv |
Universidade de São Paulo (USP), Faculdade de Odontologia de Bauru |
dc.source.none.fl_str_mv |
Web of Science 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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1808129445390712832 |