Effect of light-curing methods on resin cement knoop hardness at different depths
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/S0103-64402007000400006 http://hdl.handle.net/11449/231196 |
Resumo: | This study evaluated, using Knoop hardness test, the polymerization depth of Rely-X dual-cured resin cement activated by chemical reaction alone (control group) or by chemical/physical mode with light curing through a 1.5-mm-thick ceramic layer (HeraCeram). Bovine incisors had their buccal surface flattened and hybridized. On this surface, a rubber mould (5 mm diameter; 1 mm high) was bulk filled with cement. Either a polyester strip or a 1.5-mm-thick disc of the veneering material was seated over this set. Light curing was performed with either conventional halogen light (QTH; XL2500) for 40 s, light-emitting diode (LED; Ultrablue Is) for 40 s or xenon plasma arc (PAC; Apollo 95E) for 3 s. In a control group, cement setting occurred by chemical reaction alone. After storage dry in dark (24 h/37oC), the specimens (n=5) were sectioned for hardness (KHN) measurements at three depths in a microhardness tester (50 gf load/15 s). Data were submitted to ANOVA and Tukey's test (α = 0.05). Rely-X cement presented higher Knoop hardness values when the QTH and LED LCUs were used, compared to the control group and PAC. Light curing with PAC resulted in lower hardness compared to the control group. Cement hardness was significantly lower in deeper regions. |
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Repositório Institucional da UNESP |
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spelling |
Effect of light-curing methods on resin cement knoop hardness at different depthsDental porcelainHardnessPolymerizationResin cementThis study evaluated, using Knoop hardness test, the polymerization depth of Rely-X dual-cured resin cement activated by chemical reaction alone (control group) or by chemical/physical mode with light curing through a 1.5-mm-thick ceramic layer (HeraCeram). Bovine incisors had their buccal surface flattened and hybridized. On this surface, a rubber mould (5 mm diameter; 1 mm high) was bulk filled with cement. Either a polyester strip or a 1.5-mm-thick disc of the veneering material was seated over this set. Light curing was performed with either conventional halogen light (QTH; XL2500) for 40 s, light-emitting diode (LED; Ultrablue Is) for 40 s or xenon plasma arc (PAC; Apollo 95E) for 3 s. In a control group, cement setting occurred by chemical reaction alone. After storage dry in dark (24 h/37oC), the specimens (n=5) were sectioned for hardness (KHN) measurements at three depths in a microhardness tester (50 gf load/15 s). Data were submitted to ANOVA and Tukey's test (α = 0.05). Rely-X cement presented higher Knoop hardness values when the QTH and LED LCUs were used, compared to the control group and PAC. Light curing with PAC resulted in lower hardness compared to the control group. Cement hardness was significantly lower in deeper regions.Dental Materials Area Department of Restorative Dentistry School of Dentistry of iracicaba State University of Campinas, Piracicaba, SPDental Materials Area Department of Dental Materials and Prosthodontics School of Dentistry of São Jose dos Campos State University of São Paulo, São Jose dos Campos, SPProsthodontics Area Department of Prosthodontics and Periodontics School of Dentistry of Piracicaba State University of Campinas, PiracicabaUniversidade Estadual de Campinas (UNICAMP)Universidade de São Paulo (USP)Sinhoreti, Mário Alexandre CoelhoManetta, Izabella PaolaTango, Rubens NisieIriyama, Nelson TetsuConsani, Rafael Leonardo XediekCorrer-Sobrinho, Lourenço2022-04-29T08:43:58Z2022-04-29T08:43:58Z2007-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article305-308http://dx.doi.org/10.1590/S0103-64402007000400006Brazilian Dental Journal, v. 18, n. 4, p. 305-308, 2007.1806-47600103-6440http://hdl.handle.net/11449/23119610.1590/S0103-644020070004000062-s2.0-61449514340Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengBrazilian Dental Journalinfo:eu-repo/semantics/openAccess2022-04-29T08:43:58Zoai:repositorio.unesp.br:11449/231196Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T17:01:19.917886Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Effect of light-curing methods on resin cement knoop hardness at different depths |
title |
Effect of light-curing methods on resin cement knoop hardness at different depths |
spellingShingle |
Effect of light-curing methods on resin cement knoop hardness at different depths Sinhoreti, Mário Alexandre Coelho Dental porcelain Hardness Polymerization Resin cement |
title_short |
Effect of light-curing methods on resin cement knoop hardness at different depths |
title_full |
Effect of light-curing methods on resin cement knoop hardness at different depths |
title_fullStr |
Effect of light-curing methods on resin cement knoop hardness at different depths |
title_full_unstemmed |
Effect of light-curing methods on resin cement knoop hardness at different depths |
title_sort |
Effect of light-curing methods on resin cement knoop hardness at different depths |
author |
Sinhoreti, Mário Alexandre Coelho |
author_facet |
Sinhoreti, Mário Alexandre Coelho Manetta, Izabella Paola Tango, Rubens Nisie Iriyama, Nelson Tetsu Consani, Rafael Leonardo Xediek Correr-Sobrinho, Lourenço |
author_role |
author |
author2 |
Manetta, Izabella Paola Tango, Rubens Nisie Iriyama, Nelson Tetsu Consani, Rafael Leonardo Xediek Correr-Sobrinho, Lourenço |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual de Campinas (UNICAMP) Universidade de São Paulo (USP) |
dc.contributor.author.fl_str_mv |
Sinhoreti, Mário Alexandre Coelho Manetta, Izabella Paola Tango, Rubens Nisie Iriyama, Nelson Tetsu Consani, Rafael Leonardo Xediek Correr-Sobrinho, Lourenço |
dc.subject.por.fl_str_mv |
Dental porcelain Hardness Polymerization Resin cement |
topic |
Dental porcelain Hardness Polymerization Resin cement |
description |
This study evaluated, using Knoop hardness test, the polymerization depth of Rely-X dual-cured resin cement activated by chemical reaction alone (control group) or by chemical/physical mode with light curing through a 1.5-mm-thick ceramic layer (HeraCeram). Bovine incisors had their buccal surface flattened and hybridized. On this surface, a rubber mould (5 mm diameter; 1 mm high) was bulk filled with cement. Either a polyester strip or a 1.5-mm-thick disc of the veneering material was seated over this set. Light curing was performed with either conventional halogen light (QTH; XL2500) for 40 s, light-emitting diode (LED; Ultrablue Is) for 40 s or xenon plasma arc (PAC; Apollo 95E) for 3 s. In a control group, cement setting occurred by chemical reaction alone. After storage dry in dark (24 h/37oC), the specimens (n=5) were sectioned for hardness (KHN) measurements at three depths in a microhardness tester (50 gf load/15 s). Data were submitted to ANOVA and Tukey's test (α = 0.05). Rely-X cement presented higher Knoop hardness values when the QTH and LED LCUs were used, compared to the control group and PAC. Light curing with PAC resulted in lower hardness compared to the control group. Cement hardness was significantly lower in deeper regions. |
publishDate |
2007 |
dc.date.none.fl_str_mv |
2007-01-01 2022-04-29T08:43:58Z 2022-04-29T08:43:58Z |
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/S0103-64402007000400006 Brazilian Dental Journal, v. 18, n. 4, p. 305-308, 2007. 1806-4760 0103-6440 http://hdl.handle.net/11449/231196 10.1590/S0103-64402007000400006 2-s2.0-61449514340 |
url |
http://dx.doi.org/10.1590/S0103-64402007000400006 http://hdl.handle.net/11449/231196 |
identifier_str_mv |
Brazilian Dental Journal, v. 18, n. 4, p. 305-308, 2007. 1806-4760 0103-6440 10.1590/S0103-64402007000400006 2-s2.0-61449514340 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Brazilian Dental Journal |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
305-308 |
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_ |
1808128739748347904 |