复合树脂双层修复中不同树脂品牌、配色方案及 牙釉质树脂厚度对颜色的影响

Effects of different brands，color matching methods and enamel thicknesses on the color of double-layered resin composite restorations

摘要:

目的：研究不同树脂品牌、配色方案和牙釉质树脂厚度对复合树脂双层修复最终颜色的影响及与VITA比色板颜色的匹配性。方法：选择3种品牌（3M、Coltene、Kerr）的复合树脂，按牙本质与牙釉质颜色一致（方案一）和牙本质比牙釉质深一个色号（方案二）2种配色方案制作牙釉质层分别为0.5、1.0、2.0和3.0 mm厚的圆盘形试样（n=6），电脑比色仪测量与VITA比色板A2色的色差值（ΔE值）。析因设计方差分析及Tukey’s多重检验评估2种配色方案下不同树脂品牌不同牙釉质树脂厚度间ΔE值的差异。结果：3种树脂品牌间ΔE值Coltene最大（7.52±0.93），Kerr最小（5.32±2.09）；2种配色方案的ΔE值方案一（6.11±2.50）小于方案二（6.48±2.26）；不同牙釉质树脂厚度的ΔE值0.5 mm时最小（4.46±2.55），超过0.5 mm后随着厚度增加色差加大。结论：对于复合树脂双层修复A2色，3种品牌中Kerr最接近比色板颜色；对于2种配色方案，牙本质与牙釉质选用同一色号效果更佳；对于Kerr和3M两种品牌，牙釉质树脂厚度在1.0 mm以下更能模拟出比色板的颜色。

Abstract:

Objective：To investigate the influence of different brands，enamel/dentin composite shade matching methods and enamel thicknesses on the color of double-layered resin composite restorations. Methods：Three brands of commercial resin composites（3M，Coltene，Kerr） were included in this study following two color matching methods：①Dentin color was the same with enamel color. ②Dentin color was 1unit darker than enamel color. Composite disk specimens with enamel thicknesses 0.0，0.5，1.0，2.0 and 3.0 mm were made（n=6）. The color of the specimens were assessed using a colorimeter and the color differences（ΔE） between the specimens and the VITA Classical Shade tab A2 shade were calculated. The results were analyzed by three-way analysis and Tukey’s test（P<0.05）. Results：With respect to the three composite brands，Coltene had the highest ΔE values and Kerr had the lowest ΔE values. ΔE values of color matching method 1 were significantly lower than those of color matching method 2. Enamel composite thickness of 0.5 mm was the lowest ΔE values and ΔE values were increased with the increasing of enamel thickness. Conclusion：Regarding to double-layered resin composite restorations with A2 shade，Kerr has the best results in matching the shade guide. The most color-matched method is the enamel shade and dentin shade with the same shade. The most color-matched enamel composite thickness to the shade tab is under 1.0 mm for Kerr and 3M.