Colour-stability and gloss-retention of silorane and dimethacrylate composites with accelerated aging
Colour-stability and gloss-retention of silorane and dimethacrylate composites with accelerated aging
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DOI：
10.1016/j.jdent.2008.08.001
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发表时间：
2008-11-01
影响因子：
4.4
通讯作者：
Watts, David C.
中科院分区：
文献类型：
--
作者：
Furuse, Adilson Y.;Gordon, Kathryn;Watts, David C.
目的：要评估的颜色稳定性和光泽保持性的硅烷与二甲基丙烯酸酯复合材料暴露于加速老化从日光radiation.Methods：五个盘形试样的光固化树脂复合材料的制备和手工抛光的每种材料（Filtek硅烷，Herculite XRV，Tetric Evoceram和QuiXfil）。根据ISO 7491：2000，在氙光下加速光老化前后（基线、24、72、120和192小时）对颜色和光泽进行了评估。根据CIE-Lab颜色空间用色度计进行颜色测量。计算每次的颜色变化（Δ E）。使用光泽度计测量表面光泽度。使用单因素ANOVA和Tukey检验（α = 0.05）评价结果。使用Pearson相关性（α = 0.05）评估对数时间、Δ E和光泽度之间的相关性。结果：材料通常在L* 和a* 中减少，而在B* 中增加。强烈的例外是Filtek Silorane，其保持a* 和B*。对于所有材料，发现Δ E是对数时间的正线性函数。材料的Δ E随对数时间的增加幅度和速率不同：QuiXfil > Tetric EvoCeram >（Filtek Silorane >= Herculite XRV）。Δ E保持< 3.3 for Filtek Silorane and Herculite XRV. Gloss was found to be a negative linear function of log time. Gloss was maximal in the sequence: Filtek Silorane approximate to Tetric EvoCeram >Herculite XRV > QuiXfil。结论：与一组代表性的二甲基丙烯酸酯复合材料相比，硅烷在随时间的稳定性方面给出了最佳的总体性能。(C)2008爱思唯尔有限公司保留所有权利。
Objectives: To evaluate the colour-stability and gloss-retention of silorane versus dimethacrylate composites exposed to accelerated aging from daylight radiation.Methods: Five disc-shaped specimens of photo-cured resin-composites were prepared and manually polished for each material (Filtek Silorane, Herculite XRV, Tetric Evoceram and QuiXfil). Colour and gloss were evaluated before and after periods (baseline, 24, 72, 120 and 192 h) of accelerated photo-aging in xenon light following ISO 7491:2000. Colour measurements were performed with a colourimeter according to the CIE-Lab colour-space. The colour change (Delta E) for each time was calculated. The surface gloss was measured using a glossmeter. Results were evaluated using one-way ANOVA and Tukey tests (alpha = 0.05). Correlations between log time, Delta E and gloss were evaluated using Pearson's correlation (alpha = 0.05).Results: Materials generally decreased in L* and a* and increased in b*. The strong exception was Filtek Silorane which maintained a* and b*. Delta E was found to be a positive linear function of log time for all materials. Materials varied in the magnitude and rate of increase of Delta E with log time: QuiXfil > Tetric EvoCeram > (Filtek Silorane >= Herculite XRV). Delta E remained < 3.3 for Filtek Silorane and Herculite XRV. Gloss was found to be a negative linear function of log time. Gloss was maximal in the sequence: Filtek Silorane approximate to Tetric EvoCeram > Herculite XRV > QuiXfil.Conclusions: Silorane gave the best overall performance in stability over time, compared to a set of representative dimethacrylate composites. (C) 2008 Elsevier Ltd. All rights reserved.