A critical analysis of the degree of conversion of resin-based luting cements.
A critical analysis of the degree of conversion of resin-based luting cements.
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DOI：
10.1590/s1678-77572010000500003
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发表时间：
2010-09
期刊：
影响因子：
--
通讯作者：
Silva EM
中科院分区：
文献类型：
--
作者：
Noronha Filho JD;Brandão NL;Poskus LT;Guimarães JG;Silva EM
This study analyzed the degree of conversion (DC%) of four resin-based cements (All Ceram, Enforce, Rely X ARC and Variolink II) activated by two modes (chemical and dual), and evaluated the decrease of DC% in the dual mode promoted by the interposition of a 2.0-mm-thick IPS Empress 2 disc. In the chemical activation, the resin-based cements were prepared by mixing equal amounts of base and catalyst pastes. In the dual activation, after mixing, the cements were light-activated at 650 mW/cm2 for 40 s. In a third group, the cements were lightactivated through a 2.0-mm-thick IPS Empress 2 disc. The DC% was evaluated in a FT-IR spectrometer equipped with an attenuated total reflectance crystal (ATR). The data were analyzed by two-way ANOVA and Tukey's HSD test. For all resin-based cements, the DC% was significantly higher with dual activation, followed by dual activation through IPS Empress 2, and chemical activation (p<0.05). Irrespective of the activation mode, Rely X presented the highest DC% (p<0.05). Chemically activated Variolink and All Ceram showed the worst results (p<0.05). The DC% decreased significantly when activation was performed through a 2.0-mm-thick IPS Empress 2 disc (p<0.05). The results of the present study suggest that resin-based cements could present low DC% when the materials are dually activated through 2.0 mm of reinforced ceramic materials with translucency equal to or less than that of IPS-Empress 2.
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影响因子：
14
作者：
Sideridou, I;Tserki, V;Papanastasiou, G
通讯作者：
Papanastasiou, G
DOI：
10.1002/jbm.b.30949
发表时间：
2008-05-01
影响因子：
3.4
作者：
Goncalves, Luana;Filho, Jaime D. N.;Silva, Eduardo M.
通讯作者：
Silva, Eduardo M.
影响因子：
4.6
作者：
Heffernan, MJ;Aquilino, SA;Vargas, MA
通讯作者：
Vargas, MA
影响因子：
2.2
作者：
Jung, H;Friedl, KH;Schmalz, G
通讯作者：
Schmalz, G
影响因子：
2.5
作者：
Meng, Xiangfeng;Yoshida, Keiichi;Atsuta, Mitsuru
通讯作者：
Atsuta, Mitsuru