Please use this identifier to cite or link to this item: http://guaiaca.ufpel.edu.br:8080/handle/123456789/739
metadata.dc.type: Article
Title: Effect of immediate and delayed light activation on the mechanical properties and degree of conversion in dual-cured resin cements
Authors: Faria e Silva, André Luis
Piva, Evandro
Lima, Giana da Silveira
Boaro, Letícia C.
Braga, Roberto R.
Martins, Luis R. M.
Abstract: Abstract: We evaluated the effect of activation mode (immediate or delayed light activation vs. no light activation) on diametral tensile strength (DTS), elastic modulus, ultimate tensile strength (UTS), and degree of conversion (DC) in dual-cured resin cements. Three resin cements were evaluated: Enforce, RelyX ARC, and Panavia F. The mixed cements were inserted into circular molds for the DTS test and into dumbbell-shaped molds for the UTS test. Inside the molds, the cements were light-activated either immediately or after 5 min (delayed light activation). If no light activation was performed, the materials were protected from light exposure (control). The DTS and UTS tests were performed until fracture. The elastic modulus was calculated using data from the DTS test, and DC was evaluated 24 h after manipulation using near-infrared spectroscopy. Data for each variable were individually analyzed by two-way ANOVA and the post-hoc Tukey test (α = 0.05). Regarding DTS, activation mode influenced only Panavia F specimens, which had the lowest DTS values in the absence of light activation. Activation mode did not influence the elastic modulus or UTS of any resin cement evaluated. Immediate light activation yielded higher DC values as compared with the absence of light activation. (Journal of Oral Science 54, 261-266, 2012)
Keywords: Resin cement
Polymerization
Dental cement
Publisher: Nihon University School of Dentistry
Citation: Faria-e-Silva, A.L. ; Piva, Evandro ; LIMA, Giana da Silveira ; Boaro,L.C.C. ; Braga, R ; Martins, L. R. . Effect of immediate and delayed light activation on the mechanical properties and degree of conversion in dual-cured resin cements. Journal of Oral Science (Online), v. 54, p. 261-266, 2012.
URI: http://hdl.handle.net/123456789/739
Issue Date: 2012
Appears in Collections:Departamento de Odontologia Restauradora: Artigos de periódicos

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