The aim of this in vitro study was to investigate the effect of frequently consumed beverages on the color stability and surface properties of direct and indirect dental composite materials. The two dental composite materials (direct and indirect) and four beverages (distilled water, tea, coffee, cola) were assessed. The specimens were prepared for evaluating monomer conversion, water sorption, and color stability (n = 10) and taking scanning electron and atomic force microscopy images (n = 3). The data were analyzed using independent t-test, Mann-Whitney U test, two-way analysis of variance, and Spearman's correlation (P < .05). Indirect dental composite materials had better monomer conversion, color stability, and surface roughness value when compared to direct dental composite materials (P < .001, P = .002, P = .002, respectively). The control group had lower ΔE₀₀ values when compared to the tea (P < .001) and coffee (P < .001) groups. There was a negative correlation between monomer conversion and surface roughness (r = −0.481, P = .032). Color stability and surface roughness value of direct dental composite materials differed from indirect dental composite materials after immersed in different beverages. The tested beverages significantly influenced color stability.

中文翻译：

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不同饮料对复合树脂材料颜色稳定性及表面性能的影响

这项体外研究的目的是研究经常饮用的饮料对直接和间接牙科复合材料的颜色稳定性和表面特性的影响。评估了两种牙科复合材料（直接和间接）和四种饮料（蒸馏水、茶、咖啡、可乐）。制备样品用于评估单体转化率、吸水率和颜色稳定性 (n = 10) 并拍摄扫描电子和原子力显微镜图像 (n = 3)。数据采用独立t检验、Mann-Whitney U检验、双向方差分析和 Spearman 相关（P < .05）。与直接牙科复合材料相比，间接牙科复合材料具有更好的单体转化率、颜色稳定性和表面粗糙度值（分别为P  < .001、P  = .002、P  = .002）。与茶 ( P  < .001) 和咖啡 ( P  < .001) 组相比，对照组具有较低的 Δ E ₀₀值。单体转化率与表面粗糙度呈负相关（r  = -0.481, P = .032）。直接牙科复合材料与间接牙科复合材料在不同饮料中浸泡后的颜色稳定性和表面粗糙度值不同。测试的饮料显着影响颜色稳定性。