The effects of exposure time on the surface microhardness of three dual-cured dental resin cements

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorAguiar, Tatiana C.
dc.creatorSaad, José Roberto Cury
dc.creatorPinto, Shelon C. S.
dc.creatorCalixto, Luiz R.
dc.creatorLima, Darlon M.
dc.creatorSilva, Marcos A. S.
dc.creatorBandéca, Matheus C.
dc.date2014-05-27T11:25:59Z
dc.date2016-10-25T18:34:24Z
dc.date2014-05-27T11:25:59Z
dc.date2016-10-25T18:34:24Z
dc.date2011-09-01
dc.date.accessioned2017-04-06T01:52:10Z
dc.date.available2017-04-06T01:52:10Z
dc.identifierPolymers, v. 3, n. 3, p. 998-1005, 2011.
dc.identifier2073-4360
dc.identifierhttp://hdl.handle.net/11449/72644
dc.identifierhttp://acervodigital.unesp.br/handle/11449/72644
dc.identifier10.3390/polym3030998
dc.identifier2-s2.0-83655191692.pdf
dc.identifier2-s2.0-83655191692
dc.identifierhttp://dx.doi.org/10.3390/polym3030998
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/893498
dc.descriptionThis study evaluated the exposure time of light-curing of the polymers used for cementation on microhardness test in different storage times. The polymers (specifically called resin cements) were RelyX ARC, RelyX U100, and SET. Five specimens of each group were prepared and photo-polymerized with exposure times of 20 s and 180 s, using a LED polymerization unit with wavelength of 440 ~ 480 nm and light output was consistently 1,500 mW/cm2. The Vickers hardness test was performed in a MMT-3 Microhardness Tester. Data were submitted to ANOVA and Tukey's test (α = 0.05). The values of RelyX ARC showed statistically significant difference to groups with light exposure when considering only chemical cure (p < 0.05). The groups with light exposure (20 s and 180 s) showed no significant difference between them (p > 0.05). The RelyX U100 cured only chemically showed statistically significant difference between 48 h and 7 days (p < 0.05). The SET resin cement showed no significant difference to groups without light exposure for all storage times (p > 0.05). The values of hardening of the dual-cured resin cements improved after setting by light and chemical activation demonstrating the importance of light curing. © 2011 by the authors.
dc.languageeng
dc.relationPolymers
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectHardness
dc.subjectPhoto-responsive polymers
dc.subjectPolymers
dc.subjectDental resins
dc.subjectExposure-time
dc.subjectLight curing
dc.subjectLight exposure
dc.subjectLight output
dc.subjectMicrohardness tester
dc.subjectMicrohardness tests
dc.subjectPhoto-responsive polymer
dc.subjectResin cement
dc.subjectStatistically significant difference
dc.subjectSurface microhardness
dc.subjectCements
dc.subjectChemical activation
dc.subjectCuring
dc.subjectDental materials
dc.subjectLight emitting diodes
dc.subjectMicrohardness
dc.subjectResins
dc.subjectVickers hardness
dc.subjectVickers hardness testing
dc.titleThe effects of exposure time on the surface microhardness of three dual-cured dental resin cements
dc.typeOtro


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