Effect of Immediate or Delayed Light Activation on Curing Kinetics and Shrinkage Stress of Dual-Cure Resin Cements

dc.creatorFaria-e-Silva, A
dc.creatorBoaro, L
dc.creatorBraga, R
dc.creatorPiva, E
dc.creatorArias, V
dc.creatorMartins, L
dc.date2011
dc.dateMAR-APR
dc.date2014-07-30T17:12:38Z
dc.date2015-11-26T16:30:08Z
dc.date2014-07-30T17:12:38Z
dc.date2015-11-26T16:30:08Z
dc.date.accessioned2018-03-28T23:11:11Z
dc.date.available2018-03-28T23:11:11Z
dc.identifierOperative Dentistry. Operative Dentistry Inc, v. 36, n. 2, n. 196, n. 204, 2011.
dc.identifier0361-7734
dc.identifierWOS:000293677700010
dc.identifier10.2341/10-153-L
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/64425
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/64425
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1269898
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionObjectives: This study evaluated the effect of light activation (absence, immediate, or delayed) on conversion kinetics and polymerization stress of three commercial dual-cured resin cements (Enforce, RelyX ARC, and Panavia F). Methods: Degree of conversion (DC) was monitored for 30 minutes using real-time near-Fourier transform infrared spectroscopy. The cement was mixed, placed on the spectrometer sample holder, and light activated either immediately or after five minutes (delayed light activation). When no light activation was performed, the materials were protected from light exposure (control). DC was evaluated at five and 30 minutes postmixture. Maximum rates of polymerization (Rp(max)) were obtained from the first derivative of the DC vs time curve. Polymerization stress was monitored for 30 minutes in 1-mm-thick specimens inserted between two cylinders attached to a universal testing machine. Data were submitted to analysis of variance/Tukey tests (alpha=0.05). Results: Immediate light activation promoted the highest DC at five minutes. At 30 minutes, only RelyX ARC did not present a significant difference in DC between activation modes. Enforce and Panavia F presented higher Rp(max) for immediate and delayed light-activation, respectively. RelyX ARC showed similar Rp(max) for all activation modes. The absence of light activation resulted in the lowest stress followed by delayed light activation, while immediate light activation led to the highest values. RelyX ARC showed higher stress than Enforce, while the stress of Panavia F was similar to that of the others. Conclusion: Delayed light activation reduced the polymerization stress of the resin cements tested without jeopardizing DC.
dc.description36
dc.description2
dc.description196
dc.description204
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionFAPESP [2007/01006-1, 2007/00998-0]
dc.languageen
dc.publisherOperative Dentistry Inc
dc.publisherIndianapolis
dc.publisherÍndia
dc.relationOperative Dentistry
dc.relationOper. Dent.
dc.rightsfechado
dc.sourceWeb of Science
dc.subjectPolymerization Contraction Stress
dc.subjectDental Composite
dc.subjectConversion
dc.subjectInlays
dc.subjectModes
dc.titleEffect of Immediate or Delayed Light Activation on Curing Kinetics and Shrinkage Stress of Dual-Cure Resin Cements
dc.typeArtículos de revistas


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