Li Q, Yu H, Wang Y
Wuhan University, China.
J Dent. 2009 May;37(5):348-56. doi: 10.1016/j.jdent.2009.01.003. Epub 2009 Feb 8.
The aim of this in vivo study was to evaluate the effects of a home-bleaching agent on the color and surface properties of four tooth-colored restorative materials.
Two composite resins (a nano-hybrid and a packable), a polyacid-modified composite and a conventional glass-ionomer were tested. Specimens were inserted into custom-fabricated trays, and underwent a routine home-bleaching treatment. CIE Lab* color coordinates of the specimens were obtained using a spectrophotometer. Ultra-structural effects were investigated by SEM and ATR-FTIR. The color data were analyzed with ANOVA and Tukey's post hoc analysis.
Significant color changes were found among all the materials after bleaching. However, the color differences decreased and fell into the clinically acceptable range (except for the compomer) after withdrawal of the bleaching treatment. Surface dissolution was detected in the polyacid-modified composite and glass-ionomer cement. ATR-FTIR analyses found chemical composition alterations in the polyacid-modified composite.
A 15% carbamide peroxide home-bleaching gel did not cause color changes in the composites and glass-ionomer cement. However, significant color and chemical composition alterations were found in the polyacid-modified composite.
本体内研究的目的是评估家用漂白剂对四种牙齿颜色修复材料的颜色和表面性能的影响。
测试了两种复合树脂（一种纳米混合树脂和一种可填充树脂）、一种聚酸改性复合树脂和一种传统玻璃离子水门汀。将样本放入定制的托盘，并进行常规的家庭漂白处理。使用分光光度计获得样本的CIE Lab*颜色坐标。通过扫描电子显微镜（SEM）和衰减全反射傅里叶变换红外光谱（ATR-FTIR）研究超微结构效应。使用方差分析（ANOVA）和Tukey事后分析对颜色数据进行分析。
漂白后所有材料均出现显著的颜色变化。然而，停止漂白处理后，颜色差异减小并落入临床可接受范围内（聚酸改性复合树脂除外）。在聚酸改性复合树脂和玻璃离子水门汀中检测到表面溶解。ATR-FTIR分析发现聚酸改性复合树脂中的化学成分发生了改变。
15%的过氧化脲家用漂白凝胶不会导致复合树脂和玻璃离子水门汀发生颜色变化。然而，在聚酸改性复合树脂中发现了显著的颜色和化学成分改变。
