Indirect Restoration Thickness and Time after Light-Activation Effects on Degree of Conversion of Resin Cement
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/0103-64402013x0024 http://hdl.handle.net/11449/157648 |
Resumo: | This study evaluated the effects of indirect restorative materials, curing conditions and time on the degree of conversion (DC) of a dual-cured resin cement using infrared spectroscopy. The resin cement (RelyX Unicem 2, 3M ESPE) was applied to the diamond surface of a horizontal attenuated-total-reflectance unit and activated using one of following conditions: self-cure, direct light exposure, light exposure through indirect restorative materials (resin nano-ceramic: Lava Ultimate, 3M ESPE or feldspathic ceramic: Vita Blocks Mark II, Vita Zahnfabrik). Four thicknesses (0.5, 1.0, 1.5 or 2.0 mm) of each indirect material were analyzed, and the light-activation was performed using a blue LED light. Data (n=5) were analyzed by three-way ANOVA, Tukey's post hoc and Dunnett's tests (α=5%). No significant differences in DC were observed between indirect materials of similar thickness. All groups exhibited higher DC after 10 min than after 5 min. At both times points, the self-cure group exhibited significantly lower DC than all the light exposure groups. Only when the overlying indirect restoration had a thickness of 2 mm did DC decrease significantly. The presence of a thick, indirect restoration can decrease the DC of resin cement. DC after 10 min was higher than after 5 min. The self-cure mode yielded lower DC than the light-activating one. |
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Indirect Restoration Thickness and Time after Light-Activation Effects on Degree of Conversion of Resin Cementresin cementceramiccompositedegree of conversionlight-activation.This study evaluated the effects of indirect restorative materials, curing conditions and time on the degree of conversion (DC) of a dual-cured resin cement using infrared spectroscopy. The resin cement (RelyX Unicem 2, 3M ESPE) was applied to the diamond surface of a horizontal attenuated-total-reflectance unit and activated using one of following conditions: self-cure, direct light exposure, light exposure through indirect restorative materials (resin nano-ceramic: Lava Ultimate, 3M ESPE or feldspathic ceramic: Vita Blocks Mark II, Vita Zahnfabrik). Four thicknesses (0.5, 1.0, 1.5 or 2.0 mm) of each indirect material were analyzed, and the light-activation was performed using a blue LED light. Data (n=5) were analyzed by three-way ANOVA, Tukey's post hoc and Dunnett's tests (α=5%). No significant differences in DC were observed between indirect materials of similar thickness. All groups exhibited higher DC after 10 min than after 5 min. At both times points, the self-cure group exhibited significantly lower DC than all the light exposure groups. Only when the overlying indirect restoration had a thickness of 2 mm did DC decrease significantly. The presence of a thick, indirect restoration can decrease the DC of resin cement. DC after 10 min was higher than after 5 min. The self-cure mode yielded lower DC than the light-activating one.Este estudo avaliou os efeitos do tipo de material restaurador indireto, da condição de ativação e do tempo no grau de conversão de um cimento resinoso de dupla ativação, utilizando espectroscopia de luz infravermelha. O cemento resinoso (RelyX Unicem 2, 3M ESPE) foi aplicado à superfície do diamante da unidade de reflectância atenuada e ativado segundo as seguintes condições: ativação química, exposição direta da luz e aplicação da luz através de dois materiais protéticos: resina nano-cerâmica (Lava Ultimate, 3M ESPE) ou cerâmica feldspática (Vita Blocks Mark II, Vita Zahnfabrik). Quatro espessuras de cada um desses materiais (0,5; 1,0; 1,5 e 2,0 mm) foram analisadas e a ativação realizada com luz LED. Os dados (n=5) foram analisados pela ANOVA três fatores, testes de Tukey e Dunnett (5%). Nenhuma diferença do grau de conversão foi observada entre os materiais. Todos os grupos mostraram maior grau de conversão após 10 min que após 5 min. Em ambos os tempos, o grupo ativado quimicamente teve menor grau de conversão que todos os grupos fotoativados. O grau de conversão foi reduzido somente quando foi utilizada a peça protética de 2 mm. Espessas peças protéticas podem reduzir o grau de conversão do cemento resinoso. A grau de conversão após 10 min é maior que após 5 min da cimentação. A ativação química produz menor grau de conversão que a fotoativação.Universidade Estadual Paulista Piracicaba Dental School Department of Restorative DentistryGeorgia Regents University College of Dental Medicine Department of Oral RehabilitationUniversidade Estadual Paulista Piracicaba Dental School Department of Restorative DentistryFundação Odontológica de Ribeirão PretoUniversidade Estadual Paulista (Unesp)Georgia Regents University College of Dental Medicine Department of Oral RehabilitationAyres, Ana Paula AlmeidaAndre, Carolina BossoPacheco, Rafael RochaCarvalho, Adriana OliveiraBacelar-sá, Renata CantanhedeRueggeberg, Frederick AllenGiannini, Marcelo2018-11-12T17:26:19Z2018-11-12T17:26:19Z2015-08-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article363-367application/pdfhttp://dx.doi.org/10.1590/0103-64402013x0024Brazilian Dental Journal. Fundação Odontológica de Ribeirão Preto, v. 26, n. 4, p. 363-367, 2015.0103-6440http://hdl.handle.net/11449/15764810.1590/0103-64402013x0024S0103-64402015000400363S0103-64402015000400363.pdfSciELOreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengBrazilian Dental Journal0,476info:eu-repo/semantics/openAccess2023-11-09T06:12:26Zoai:repositorio.unesp.br:11449/157648Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-11-09T06:12:26Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Indirect Restoration Thickness and Time after Light-Activation Effects on Degree of Conversion of Resin Cement |
title |
Indirect Restoration Thickness and Time after Light-Activation Effects on Degree of Conversion of Resin Cement |
spellingShingle |
Indirect Restoration Thickness and Time after Light-Activation Effects on Degree of Conversion of Resin Cement Ayres, Ana Paula Almeida resin cement ceramic composite degree of conversion light-activation. |
title_short |
Indirect Restoration Thickness and Time after Light-Activation Effects on Degree of Conversion of Resin Cement |
title_full |
Indirect Restoration Thickness and Time after Light-Activation Effects on Degree of Conversion of Resin Cement |
title_fullStr |
Indirect Restoration Thickness and Time after Light-Activation Effects on Degree of Conversion of Resin Cement |
title_full_unstemmed |
Indirect Restoration Thickness and Time after Light-Activation Effects on Degree of Conversion of Resin Cement |
title_sort |
Indirect Restoration Thickness and Time after Light-Activation Effects on Degree of Conversion of Resin Cement |
author |
Ayres, Ana Paula Almeida |
author_facet |
Ayres, Ana Paula Almeida Andre, Carolina Bosso Pacheco, Rafael Rocha Carvalho, Adriana Oliveira Bacelar-sá, Renata Cantanhede Rueggeberg, Frederick Allen Giannini, Marcelo |
author_role |
author |
author2 |
Andre, Carolina Bosso Pacheco, Rafael Rocha Carvalho, Adriana Oliveira Bacelar-sá, Renata Cantanhede Rueggeberg, Frederick Allen Giannini, Marcelo |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Georgia Regents University College of Dental Medicine Department of Oral Rehabilitation |
dc.contributor.author.fl_str_mv |
Ayres, Ana Paula Almeida Andre, Carolina Bosso Pacheco, Rafael Rocha Carvalho, Adriana Oliveira Bacelar-sá, Renata Cantanhede Rueggeberg, Frederick Allen Giannini, Marcelo |
dc.subject.por.fl_str_mv |
resin cement ceramic composite degree of conversion light-activation. |
topic |
resin cement ceramic composite degree of conversion light-activation. |
description |
This study evaluated the effects of indirect restorative materials, curing conditions and time on the degree of conversion (DC) of a dual-cured resin cement using infrared spectroscopy. The resin cement (RelyX Unicem 2, 3M ESPE) was applied to the diamond surface of a horizontal attenuated-total-reflectance unit and activated using one of following conditions: self-cure, direct light exposure, light exposure through indirect restorative materials (resin nano-ceramic: Lava Ultimate, 3M ESPE or feldspathic ceramic: Vita Blocks Mark II, Vita Zahnfabrik). Four thicknesses (0.5, 1.0, 1.5 or 2.0 mm) of each indirect material were analyzed, and the light-activation was performed using a blue LED light. Data (n=5) were analyzed by three-way ANOVA, Tukey's post hoc and Dunnett's tests (α=5%). No significant differences in DC were observed between indirect materials of similar thickness. All groups exhibited higher DC after 10 min than after 5 min. At both times points, the self-cure group exhibited significantly lower DC than all the light exposure groups. Only when the overlying indirect restoration had a thickness of 2 mm did DC decrease significantly. The presence of a thick, indirect restoration can decrease the DC of resin cement. DC after 10 min was higher than after 5 min. The self-cure mode yielded lower DC than the light-activating one. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-08-01 2018-11-12T17:26:19Z 2018-11-12T17:26:19Z |
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/10.1590/0103-64402013x0024 Brazilian Dental Journal. Fundação Odontológica de Ribeirão Preto, v. 26, n. 4, p. 363-367, 2015. 0103-6440 http://hdl.handle.net/11449/157648 10.1590/0103-64402013x0024 S0103-64402015000400363 S0103-64402015000400363.pdf |
url |
http://dx.doi.org/10.1590/0103-64402013x0024 http://hdl.handle.net/11449/157648 |
identifier_str_mv |
Brazilian Dental Journal. Fundação Odontológica de Ribeirão Preto, v. 26, n. 4, p. 363-367, 2015. 0103-6440 10.1590/0103-64402013x0024 S0103-64402015000400363 S0103-64402015000400363.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Brazilian Dental Journal 0,476 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
363-367 application/pdf |
dc.publisher.none.fl_str_mv |
Fundação Odontológica de Ribeirão Preto |
publisher.none.fl_str_mv |
Fundação Odontológica de Ribeirão Preto |
dc.source.none.fl_str_mv |
SciELO 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_ |
1799964874318544896 |