Al-Dharrab Ayman
Assistant Professor and Consultant, Department of Oral and Maxillofacial Rehabilitation, Faculty of Dentistry, King Abdulaziz University, Jeddah-21589, Saudi Arabia, e-mail:
J Contemp Dent Pract. 2013 Jul 1;14(4):704-11. doi: 10.5005/jp-journals-10024-1388.
To study the effect of three energy drinks on the color stability of nanofilled composite resins after different periods of aging time.
Composite resin disks, 6 mm diameter, 3 mm thickness were prepared from Filtec Z350 XT, Tetric EvoCeram, and Filtec Z250 XT. Specimens from each material were tested after aging with Red Bull, Bison and Power Horse energy drinks and distilled water as a control. Specimens were stored at 37°C in dark containers for 1, 7, 30 and 60 days. Color was assessed in the CIELAB using a colorimeter before and after each storage period. Color differences ΔEab and Δb among specimens were measured. Mean values were statistically analyzed using one-way analysis of variance (ANOVA), with p < 0.05 as significance level.
The color change ΔEab and Δb occurred by Red Bull, Bison and Power Horse energy drinks was significantly different for all tested materials at all four times p < 0.05 except in the Red Bull group. All specimens showed increase in color changes toward yellowness Δb* after a period of 1, 7, 30 and 60 days. The highest total color difference ΔE*ab was found in the Red Bull group after 60 days.
Energy drinks used in this study had staining effect on the tested composite resin materials. The discoloration increased with aging time toward yellowness; however, it was not perceptible in all test groups after 60 days.
研究三种能量饮料对纳米填充复合树脂在不同老化时间后的颜色稳定性的影响。
用Filtec Z350 XT、Tetric EvoCeram和Filtec Z250 XT制备直径6 mm、厚度3 mm的复合树脂圆盘。每种材料的试样分别用红牛、野牛和动力马能量饮料进行老化处理，并以蒸馏水作为对照进行测试。试样在37°C下于黑暗容器中保存1、7、30和60天。在每个保存期前后，使用色差仪在CIELAB空间中评估颜色。测量试样之间的色差ΔEab和Δb。使用单因素方差分析（ANOVA）对平均值进行统计分析，以p < 0.05作为显著性水平。
除红牛组外，在所有四个时间点，红牛、野牛和动力马能量饮料引起的颜色变化ΔEab和Δb在所有测试材料中均存在显著差异（p < 0.05）。在1、7、30和60天后，所有试样的颜色变化均朝着黄色方向增加（Δb*）。60天后，红牛组的总色差ΔE*ab最高。
本研究中使用的能量饮料对测试的复合树脂材料有染色作用。变色随着老化时间朝着黄色增加；然而，60天后并非所有测试组都能察觉到这种变化。
