染色溶液对树脂纳米复合材料变色的影响。
Effect of staining solutions on discoloration of resin nanocomposites.
作者信息
Park Jeong-Kil, Kim Tae-Hyong, Ko Ching-Chang, García-Godoy Franklin, Kim Hyung-Il, Kwon Yong Hoon
机构信息
Department of Conservative Dentistry, School of Dentistry and Medical Research Institute, Pusan National University, Yangsan, Korea.
出版信息
Am J Dent. 2010 Feb;23(1):39-42.
PURPOSE
To examine the effect of staining solutions on the discoloration of resin nanocomposites.
METHODS
Three resin nanocomposites (Ceram X, Grandio, and Filtek Z350) were light cured for 40 seconds at a light intensity of 1000 mW/cm2. The color of the specimens was measured in %R (reflectance) mode before and after immersing the specimens in four different test solutions [distilled water (DW), coffee (CF), 50% ethanol (50ET) and brewed green tea (GT)] for 7 hours/day over a 3-week period. The color difference (deltaE*) was obtained based on the CIELab* color coordinate values.
RESULTS
The specimens immersed in DW, 50ET and GT showed a slight increase in L* value. However, the samples immersed in CF showed a decrease in the L* value and an increase in the b* value. CF induced a significant color change (deltaE*: 3.1-5.6) in most specimens but the other solutions induced only a slight color change. Overall, coffee caused unacceptable color changes to the resin nanocomposites.
目的
研究染色溶液对树脂纳米复合材料变色的影响。
方法
三种树脂纳米复合材料（Ceram X、Grandio和Filtek Z350）在光强为1000 mW/cm2的条件下光固化40秒。在将试样浸泡于四种不同测试溶液[蒸馏水（DW）、咖啡（CF）、50%乙醇（50ET）和泡制绿茶（GT）]中，每天浸泡7小时，持续3周前后，以%R（反射率）模式测量试样颜色。基于CIELab颜色坐标值获得色差（ΔE）。
结果
浸泡于DW、50ET和GT中的试样L值略有增加。然而，浸泡于CF中的试样L值降低，b值增加。CF在大多数试样中引起显著的颜色变化（ΔE：3.1 - 5.6），但其他溶液仅引起轻微的颜色变化。总体而言，咖啡导致树脂纳米复合材料出现不可接受的颜色变化。
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