Influência da fotopolimerização e da cor da resina composta na microdureza

Detalhes bibliográficos
Autor(a) principal: Firoozmand, Leily Macedo [UNESP]
Data de Publicação: 2009
Outros Autores: Balducci, Ivan [UNESP], de Araújo, Maria Amélia Máximo [UNESP]
Tipo de documento: Artigo
Idioma: por
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.4034/1519.0501.2009.0091.0007
http://hdl.handle.net/11449/71166
Resumo: Objective: To study the influence of color opacity and light-curing systems (halogen light vs blue LED) on the microhardness of a composite resin. Methods: Esthet-X composite resin (Dentsply), shades A2 and A2-O, was inserted in a stainless steel matrix (5 mm diameter and 2 mm deep) and was light cured for 40 seconds with a halogen light source (XL 3000; 3M/ESPE) or a blue LED (Optilight LD II; Gnatus). Eight groups of 15 specimens each were formed, and were further divided according to the light-curing systems, the exposed area (base and surface), and the opacity of the composite resin, producing 120 specimens. The specimens were next stored in distilled water for 24 hours, embedded in a chemically activated acrylic resin, then subjected to finishing and polishing with sandpaper and felt discs. Microhardness was measured with a Vickers Digital Microhardness meter, with a 50 g load for 30 seconds. The obtained microhardness means were analyzed by ANOVA and Tukey's multiple-comparison test at 5% significance level. Results: The surface microhardness was always greater than the base microhardness, regardless of the light-curing source. The halogen light lamp produced significantly higher composite resin microhardness means than the blue LED (57.61 vs. 42.53 HV) (p<0.05). Statistically significant differences (p<0.05) were obtained between the microhardness means for the different composite opacities; lowest microhardness in depth was produced by the A2-O shade. Conclusion: Composite resin opacity as well as the light-curing system influenced the microhardness of the material.
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spelling Influência da fotopolimerização e da cor da resina composta na microdurezaInfluence of light curing and shade on the microhardness of a composite resinObjective: To study the influence of color opacity and light-curing systems (halogen light vs blue LED) on the microhardness of a composite resin. Methods: Esthet-X composite resin (Dentsply), shades A2 and A2-O, was inserted in a stainless steel matrix (5 mm diameter and 2 mm deep) and was light cured for 40 seconds with a halogen light source (XL 3000; 3M/ESPE) or a blue LED (Optilight LD II; Gnatus). Eight groups of 15 specimens each were formed, and were further divided according to the light-curing systems, the exposed area (base and surface), and the opacity of the composite resin, producing 120 specimens. The specimens were next stored in distilled water for 24 hours, embedded in a chemically activated acrylic resin, then subjected to finishing and polishing with sandpaper and felt discs. Microhardness was measured with a Vickers Digital Microhardness meter, with a 50 g load for 30 seconds. The obtained microhardness means were analyzed by ANOVA and Tukey's multiple-comparison test at 5% significance level. Results: The surface microhardness was always greater than the base microhardness, regardless of the light-curing source. The halogen light lamp produced significantly higher composite resin microhardness means than the blue LED (57.61 vs. 42.53 HV) (p<0.05). Statistically significant differences (p<0.05) were obtained between the microhardness means for the different composite opacities; lowest microhardness in depth was produced by the A2-O shade. Conclusion: Composite resin opacity as well as the light-curing system influenced the microhardness of the material.Faculdade de Odontologia Universidade Estadual Paulista (UNESP), São José dos Campos/SPDepartamento de Odontologia Social e Clínica Infantil Faculdade de Odontologia Universidade Estadual Paulista (UNESP), São José dos Campos/SPDepartamento de Odontologia Restauradora Faculdade de Odontologia Universidade Estadual Paulista (UNESP), São José dos Campos/SPFaculdade de Odontologia Universidade Estadual Paulista (UNESP), São José dos Campos/SPDepartamento de Odontologia Social e Clínica Infantil Faculdade de Odontologia Universidade Estadual Paulista (UNESP), São José dos Campos/SPDepartamento de Odontologia Restauradora Faculdade de Odontologia Universidade Estadual Paulista (UNESP), São José dos Campos/SPUniversidade Estadual Paulista (Unesp)Firoozmand, Leily Macedo [UNESP]Balducci, Ivan [UNESP]de Araújo, Maria Amélia Máximo [UNESP]2014-05-27T11:23:59Z2014-05-27T11:23:59Z2009-09-30info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article37-42application/pdfhttp://dx.doi.org/10.4034/1519.0501.2009.0091.0007Pesquisa Brasileira em Odontopediatria e Clinica Integrada, v. 9, n. 1, p. 37-42, 2009.1519-05011983-4632http://hdl.handle.net/11449/7116610.4034/1519.0501.2009.0091.00072-s2.0-703494328052-s2.0-70349432805.pdf9255322461241527Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporPesquisa Brasileira em Odontopediatria e Clinica Integrada0,2830,283info:eu-repo/semantics/openAccess2023-12-22T06:26:51Zoai:repositorio.unesp.br:11449/71166Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T21:03:06.107691Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Influência da fotopolimerização e da cor da resina composta na microdureza
Influence of light curing and shade on the microhardness of a composite resin
title Influência da fotopolimerização e da cor da resina composta na microdureza
spellingShingle Influência da fotopolimerização e da cor da resina composta na microdureza
Firoozmand, Leily Macedo [UNESP]
title_short Influência da fotopolimerização e da cor da resina composta na microdureza
title_full Influência da fotopolimerização e da cor da resina composta na microdureza
title_fullStr Influência da fotopolimerização e da cor da resina composta na microdureza
title_full_unstemmed Influência da fotopolimerização e da cor da resina composta na microdureza
title_sort Influência da fotopolimerização e da cor da resina composta na microdureza
author Firoozmand, Leily Macedo [UNESP]
author_facet Firoozmand, Leily Macedo [UNESP]
Balducci, Ivan [UNESP]
de Araújo, Maria Amélia Máximo [UNESP]
author_role author
author2 Balducci, Ivan [UNESP]
de Araújo, Maria Amélia Máximo [UNESP]
author2_role author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv Firoozmand, Leily Macedo [UNESP]
Balducci, Ivan [UNESP]
de Araújo, Maria Amélia Máximo [UNESP]
description Objective: To study the influence of color opacity and light-curing systems (halogen light vs blue LED) on the microhardness of a composite resin. Methods: Esthet-X composite resin (Dentsply), shades A2 and A2-O, was inserted in a stainless steel matrix (5 mm diameter and 2 mm deep) and was light cured for 40 seconds with a halogen light source (XL 3000; 3M/ESPE) or a blue LED (Optilight LD II; Gnatus). Eight groups of 15 specimens each were formed, and were further divided according to the light-curing systems, the exposed area (base and surface), and the opacity of the composite resin, producing 120 specimens. The specimens were next stored in distilled water for 24 hours, embedded in a chemically activated acrylic resin, then subjected to finishing and polishing with sandpaper and felt discs. Microhardness was measured with a Vickers Digital Microhardness meter, with a 50 g load for 30 seconds. The obtained microhardness means were analyzed by ANOVA and Tukey's multiple-comparison test at 5% significance level. Results: The surface microhardness was always greater than the base microhardness, regardless of the light-curing source. The halogen light lamp produced significantly higher composite resin microhardness means than the blue LED (57.61 vs. 42.53 HV) (p<0.05). Statistically significant differences (p<0.05) were obtained between the microhardness means for the different composite opacities; lowest microhardness in depth was produced by the A2-O shade. Conclusion: Composite resin opacity as well as the light-curing system influenced the microhardness of the material.
publishDate 2009
dc.date.none.fl_str_mv 2009-09-30
2014-05-27T11:23:59Z
2014-05-27T11:23:59Z
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/10.4034/1519.0501.2009.0091.0007
Pesquisa Brasileira em Odontopediatria e Clinica Integrada, v. 9, n. 1, p. 37-42, 2009.
1519-0501
1983-4632
http://hdl.handle.net/11449/71166
10.4034/1519.0501.2009.0091.0007
2-s2.0-70349432805
2-s2.0-70349432805.pdf
9255322461241527
url http://dx.doi.org/10.4034/1519.0501.2009.0091.0007
http://hdl.handle.net/11449/71166
identifier_str_mv Pesquisa Brasileira em Odontopediatria e Clinica Integrada, v. 9, n. 1, p. 37-42, 2009.
1519-0501
1983-4632
10.4034/1519.0501.2009.0091.0007
2-s2.0-70349432805
2-s2.0-70349432805.pdf
9255322461241527
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv Pesquisa Brasileira em Odontopediatria e Clinica Integrada
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dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
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dc.format.none.fl_str_mv 37-42
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dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
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instname_str Universidade Estadual Paulista (UNESP)
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