Influência da fotopolimerização e da cor da resina composta na microdureza
Autor(a) principal: | |
---|---|
Data de Publicação: | 2009 |
Outros Autores: | , |
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. |
id |
UNSP_ab843ad9422c6782e1e42653d782c3f7 |
---|---|
oai_identifier_str |
oai:repositorio.unesp.br:11449/71166 |
network_acronym_str |
UNSP |
network_name_str |
Repositório Institucional da UNESP |
repository_id_str |
2946 |
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 0,283 0,283 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
37-42 application/pdf |
dc.source.none.fl_str_mv |
Scopus 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_ |
1808129278459510784 |