Please use this identifier to cite or link to this item: http://guaiaca.ufpel.edu.br:8080/handle/123456789/796
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dc.contributor.authorReges, Rogério Vieira-
dc.contributor.authorCosta, Ana Rosa-
dc.contributor.authorCorrer, Américo Bortolazzo-
dc.contributor.authorPiva, Evandro-
dc.contributor.authorRontani, Regina Maria Puppin-
dc.contributor.authorSinhoreti, Mário Alexandre Coelho-
dc.contributor.authorCorrer Sobrinho, Lourenço-
dc.date.accessioned2013-11-21T09:42:05Z-
dc.date.available2013-11-21T09:42:05Z-
dc.date.issued2009-
dc.identifier.citationREGES, 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.pt_BR
dc.identifier.issn0103-6440-
dc.identifier.urihttp://hdl.handle.net/123456789/796-
dc.description.abstractThe 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.pt_BR
dc.description.provenanceSubmitted by Darlene Silveira (souzasilveirad@yahoo.com.br) on 2013-11-20T11:32:55Z No. of bitstreams: 1 Effect of light-curing units, post-cured time and shade of resin cement on knoop hardness.pdf: 233423 bytes, checksum: d8237584ffe52990ec2abea17ea63bf0 (MD5)en
dc.description.provenanceApproved for entry into archive by Fabiano Malheiro(fabianomalheiro22@hotmail.com) on 2013-11-21T09:42:05Z (GMT) No. of bitstreams: 1 Effect of light-curing units, post-cured time and shade of resin cement on knoop hardness.pdf: 233423 bytes, checksum: d8237584ffe52990ec2abea17ea63bf0 (MD5)en
dc.description.provenanceMade available in DSpace on 2013-11-21T09:42:05Z (GMT). No. of bitstreams: 1 Effect of light-curing units, post-cured time and shade of resin cement on knoop hardness.pdf: 233423 bytes, checksum: d8237584ffe52990ec2abea17ea63bf0 (MD5) Previous issue date: 2009en
dc.language.isoen_USpt_BR
dc.publisherDental Foundation of Ribeirão Pretopt_BR
dc.relation.ispartofseriesv.20;n.5-
dc.subjectKnoop hardnesspt_BR
dc.subjectDental ceramicpt_BR
dc.subjectResin cementpt_BR
dc.subjectLight-curing unitpt_BR
dc.titleEffect of light curing units post cured time and shade of resin cement on knoop hardnesspt_BR
dc.typearticlept_BR
Appears in Collections:Departamento de Odontologia Restauradora: Artigos de periódicos

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