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Type: Artigo
Title: Influence Of Photoinitiator And Light-curing Source On Bond Strength Of Experimental Resin Cements To Dentin
Author: Segreto
Dario Raimundo; Naufel
Fabiana Scarparo; Brandt
William Cunha; Guiraldo
Ricardo Danil; Correr-Sobrinho
Lourenço; Sinhoreti
Mário Alexandre Coelho
Abstract: This study evaluated the bond strength (BS) of experimental resin cements formulated with different photoinitiators when activated by two kinds of light-curing units (LCUs) through a ceramic material. Seven resin blends with different camphorquinone (CQ) and/or phenylpropanedione (PPD) concentrations (weight) were prepared: C5: 0.5% CQ; C8: 0.8% CQ; P5: 0.5% PPD; P8: 0.8% PPD; C1P4: 0.1% CQ and 0.4% PPD; C4P1: 0.4% CQ and 0.1% PPD; C4P4: 0.4% CQ and 0.4% PPD. Two LCUs were used: one quartz-tungsten-halogen (QTH - 850 mW/cm²) and one light-emitting diode (LED - 1300 mW/cm²). The microtensile bond strength of each blend was assessed. Data were submitted to two-way ANOVA and Tukey's test (α=0.05). The BS values did not exhibit significant differences for LCUs, regardless of the photoinitiator type. Three cements showed significant differences: P5 and C5 had higher BS with QTH, and C4P1 with LED. For QTH, P5 showed the highest and C1P4 the lowest BS. For the LED, C4P1 showed the highest BS of all the cements. The results indicated that PPD was a viable alternative in the formulation of photocured resin cements, reducing or eliminating CQ that is yellowish without impairing the bond strength. Furthermore, both LED and QTH were effective in curing resin cements that contain PPD or CQ.
Subject: Resin Cements
Curing Lights
Bond Strength
Polymer Composites
Editor: Fundação Odontológica de Ribeirão Preto
Citation: Brazilian Dental Journal. Fundação Odontológica De Ribeirão Preto, v. 27, n. 1, p. 83 - 89
Rights: aberto
Date Issue: 2016
Appears in Collections:Unicamp - Artigos e Outros Documentos

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