Effect of light curing units post cured time and shade of resin cement on knoop hardness
Autor(a) principal: | |
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Data de Publicação: | 2009 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFPel - Guaiaca |
Texto Completo: | http://repositorio.ufpel.edu.br/handle/ri/796 |
Resumo: | The aim of this study was to evaluate the Knoop hardness after 15 min and 24 h of different shades of a dual-cured resin-based cement after indirect photoactivation (ceramic restoration) with 2 light-curing units (LCUs). The resin cement Variolink II (Ivoclar Vivadent) shade XL, A2, A3 and opaque were mixed with the catalyst paste and inserted into a black Teflon mold (5 mm diameter x 1 mm high). A transparent strip was placed over the mold and a ceramic disc (Duceram Plus, shade A3) was positioned over the resin cement. Light-activation was performed through the ceramic for 40 s using quartz-tungsten-halogen (QTH) (XL 2500; 3M ESPE) or light-emitting diode (LED) (Ultrablue Is, DMC) LCUs with power density of 615 and 610 mW/cm2, respectively. The Koop hardness was measured using a microhardness tester HMV 2 (Shimadzu) after 15 min or 24 h. Four indentations were made in each specimen. Data were subjected to ANOVA and Tukey’s test (a=0.05). The QTH LCU provided significantly higher (p<0.05) KHN values than the LED LCU. When the post-cure times were compared for the same shade, QTH and LED at 24 h provided significantly higher(p<0.05) KHN values than at 15 min. It may be concluded that the Knoop hardness was generally dependent on the LCU and post-cure time. The opaque shade of the resin cement showed lower Knoop hardness than the other shades for both LCUs and post-cure times. |
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Reges, Rogério VieiraCosta, Ana RosaCorrer, Américo BortolazzoPiva, EvandroRontani, Regina Maria PuppinSinhoreti, Mário Alexandre CoelhoCorrer Sobrinho, Lourenço2013-11-21T09:42:05Z2013-11-21T09:42:05Z2009REGES, R. V. ; COSTA, A. R. ; CORRER, Américo Bortolazzo ;PIVA, Evandro ; CORRER, A.B. ;RONTANI, R. M.P. ; SINHORETI, Mário Alexandre Coelho ; CORRER-SOBRINHO, L. . Effect of light curing units, postcured time and shade of resin cement on knoop hardness. Brazilian Dental Journal (Impresso), v. 20, p. 410-413, 2009.0103-6440http://repositorio.ufpel.edu.br/handle/ri/796The aim of this study was to evaluate the Knoop hardness after 15 min and 24 h of different shades of a dual-cured resin-based cement after indirect photoactivation (ceramic restoration) with 2 light-curing units (LCUs). The resin cement Variolink II (Ivoclar Vivadent) shade XL, A2, A3 and opaque were mixed with the catalyst paste and inserted into a black Teflon mold (5 mm diameter x 1 mm high). A transparent strip was placed over the mold and a ceramic disc (Duceram Plus, shade A3) was positioned over the resin cement. Light-activation was performed through the ceramic for 40 s using quartz-tungsten-halogen (QTH) (XL 2500; 3M ESPE) or light-emitting diode (LED) (Ultrablue Is, DMC) LCUs with power density of 615 and 610 mW/cm2, respectively. The Koop hardness was measured using a microhardness tester HMV 2 (Shimadzu) after 15 min or 24 h. Four indentations were made in each specimen. Data were subjected to ANOVA and Tukey’s test (a=0.05). The QTH LCU provided significantly higher (p<0.05) KHN values than the LED LCU. When the post-cure times were compared for the same shade, QTH and LED at 24 h provided significantly higher(p<0.05) KHN values than at 15 min. It may be concluded that the Knoop hardness was generally dependent on the LCU and post-cure time. The opaque shade of the resin cement showed lower Knoop hardness than the other shades for both LCUs and post-cure times.Dental Foundation of Ribeirão Pretov.20;n.5Knoop hardnessDental ceramicResin cementLight-curing unitEffect of light curing units post cured time and shade of resin cement on knoop hardnessinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleengreponame:Repositório Institucional da UFPel - Guaiacainstname:Universidade Federal de Pelotas (UFPEL)instacron:UFPELinfo:eu-repo/semantics/openAccessORIGINALEffect of light-curing units, post-cured time and shade of resin cement on knoop hardness.pdfEffect of light-curing units, post-cured time and shade of resin cement on knoop hardness.pdfapplication/pdf233423http://guaiaca.ufpel.edu.br/xmlui/bitstream/123456789/796/1/Effect%20of%20light-curing%20units%2c%20post-cured%20time%20and%20shade%20of%20resin%20cement%20on%20knoop%20hardness.pdfd8237584ffe52990ec2abea17ea63bf0MD51open accessLICENSElicense.txtlicense.txttext/plain; charset=utf-867http://guaiaca.ufpel.edu.br/xmlui/bitstream/123456789/796/2/license.txtfbd6c74465857056e3ca572d7586661bMD52open accessTEXTEffect of light-curing units, post-cured time and shade of resin cement on knoop hardness.pdf.txtEffect of light-curing units, post-cured time and shade of resin cement on knoop hardness.pdf.txtExtracted Texttext/plain18559http://guaiaca.ufpel.edu.br/xmlui/bitstream/123456789/796/3/Effect%20of%20light-curing%20units%2c%20post-cured%20time%20and%20shade%20of%20resin%20cement%20on%20knoop%20hardness.pdf.txtc911f85772ef561020492c31ea4ab287MD53open accessTHUMBNAILEffect of light-curing units, post-cured time and shade of resin cement on knoop hardness.pdf.jpgEffect of light-curing units, post-cured time and shade of resin cement on knoop hardness.pdf.jpgGenerated Thumbnailimage/jpeg1805http://guaiaca.ufpel.edu.br/xmlui/bitstream/123456789/796/4/Effect%20of%20light-curing%20units%2c%20post-cured%20time%20and%20shade%20of%20resin%20cement%20on%20knoop%20hardness.pdf.jpgf3e3bc58785755187f4bd4dcbbf62582MD54open access123456789/7962020-07-02 19:13:47.337open accessoai:guaiaca.ufpel.edu.br:123456789/796VG9kb3Mgb3MgaXRlbnMgZGVzc2EgY29tdW5pZGFkZSBzZWd1ZW0gYSBsaWNlbsOnYSBDcmVhdGl2ZSBDb21tb25zLg==Repositório InstitucionalPUBhttp://repositorio.ufpel.edu.br/oai/requestrippel@ufpel.edu.br || repositorio@ufpel.edu.br || aline.batista@ufpel.edu.bropendoar:2020-07-02T22:13:47Repositório Institucional da UFPel - Guaiaca - Universidade Federal de Pelotas (UFPEL)false |
dc.title.pt_BR.fl_str_mv |
Effect of light curing units post cured time and shade of resin cement on knoop hardness |
title |
Effect of light curing units post cured time and shade of resin cement on knoop hardness |
spellingShingle |
Effect of light curing units post cured time and shade of resin cement on knoop hardness Reges, Rogério Vieira Knoop hardness Dental ceramic Resin cement Light-curing unit |
title_short |
Effect of light curing units post cured time and shade of resin cement on knoop hardness |
title_full |
Effect of light curing units post cured time and shade of resin cement on knoop hardness |
title_fullStr |
Effect of light curing units post cured time and shade of resin cement on knoop hardness |
title_full_unstemmed |
Effect of light curing units post cured time and shade of resin cement on knoop hardness |
title_sort |
Effect of light curing units post cured time and shade of resin cement on knoop hardness |
author |
Reges, Rogério Vieira |
author_facet |
Reges, Rogério Vieira Costa, Ana Rosa Correr, Américo Bortolazzo Piva, Evandro Rontani, Regina Maria Puppin Sinhoreti, Mário Alexandre Coelho Correr Sobrinho, Lourenço |
author_role |
author |
author2 |
Costa, Ana Rosa Correr, Américo Bortolazzo Piva, Evandro Rontani, Regina Maria Puppin Sinhoreti, Mário Alexandre Coelho Correr Sobrinho, Lourenço |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Reges, Rogério Vieira Costa, Ana Rosa Correr, Américo Bortolazzo Piva, Evandro Rontani, Regina Maria Puppin Sinhoreti, Mário Alexandre Coelho Correr Sobrinho, Lourenço |
dc.subject.por.fl_str_mv |
Knoop hardness Dental ceramic Resin cement Light-curing unit |
topic |
Knoop hardness Dental ceramic Resin cement Light-curing unit |
description |
The aim of this study was to evaluate the Knoop hardness after 15 min and 24 h of different shades of a dual-cured resin-based cement after indirect photoactivation (ceramic restoration) with 2 light-curing units (LCUs). The resin cement Variolink II (Ivoclar Vivadent) shade XL, A2, A3 and opaque were mixed with the catalyst paste and inserted into a black Teflon mold (5 mm diameter x 1 mm high). A transparent strip was placed over the mold and a ceramic disc (Duceram Plus, shade A3) was positioned over the resin cement. Light-activation was performed through the ceramic for 40 s using quartz-tungsten-halogen (QTH) (XL 2500; 3M ESPE) or light-emitting diode (LED) (Ultrablue Is, DMC) LCUs with power density of 615 and 610 mW/cm2, respectively. The Koop hardness was measured using a microhardness tester HMV 2 (Shimadzu) after 15 min or 24 h. Four indentations were made in each specimen. Data were subjected to ANOVA and Tukey’s test (a=0.05). The QTH LCU provided significantly higher (p<0.05) KHN values than the LED LCU. When the post-cure times were compared for the same shade, QTH and LED at 24 h provided significantly higher(p<0.05) KHN values than at 15 min. It may be concluded that the Knoop hardness was generally dependent on the LCU and post-cure time. The opaque shade of the resin cement showed lower Knoop hardness than the other shades for both LCUs and post-cure times. |
publishDate |
2009 |
dc.date.issued.fl_str_mv |
2009 |
dc.date.accessioned.fl_str_mv |
2013-11-21T09:42:05Z |
dc.date.available.fl_str_mv |
2013-11-21T09:42:05Z |
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.citation.fl_str_mv |
REGES, R. V. ; COSTA, A. R. ; CORRER, Américo Bortolazzo ;PIVA, Evandro ; CORRER, A.B. ;RONTANI, R. M.P. ; SINHORETI, Mário Alexandre Coelho ; CORRER-SOBRINHO, L. . Effect of light curing units, postcured time and shade of resin cement on knoop hardness. Brazilian Dental Journal (Impresso), v. 20, p. 410-413, 2009. |
dc.identifier.uri.fl_str_mv |
http://repositorio.ufpel.edu.br/handle/ri/796 |
dc.identifier.issn.none.fl_str_mv |
0103-6440 |
identifier_str_mv |
REGES, R. V. ; COSTA, A. R. ; CORRER, Américo Bortolazzo ;PIVA, Evandro ; CORRER, A.B. ;RONTANI, R. M.P. ; SINHORETI, Mário Alexandre Coelho ; CORRER-SOBRINHO, L. . Effect of light curing units, postcured time and shade of resin cement on knoop hardness. Brazilian Dental Journal (Impresso), v. 20, p. 410-413, 2009. 0103-6440 |
url |
http://repositorio.ufpel.edu.br/handle/ri/796 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartofseries.none.fl_str_mv |
v.20;n.5 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Dental Foundation of Ribeirão Preto |
publisher.none.fl_str_mv |
Dental Foundation of Ribeirão Preto |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFPel - Guaiaca instname:Universidade Federal de Pelotas (UFPEL) instacron:UFPEL |
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Universidade Federal de Pelotas (UFPEL) |
instacron_str |
UFPEL |
institution |
UFPEL |
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Repositório Institucional da UFPel - Guaiaca |
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Repositório Institucional da UFPel - Guaiaca |
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