Guler Ahmet Umut, Yilmaz Fikret, Kulunk Tolga, Guler Eda, Kurt Safak
Faculty of Dentistry, Ondokuz Mayis University, Samsun, Turkey.
J Prosthet Dent. 2005 Aug;94(2):118-24. doi: 10.1016/j.prosdent.2005.05.004.
The ability of tooth-colored restorative materials for provisional restorations to resist stains is important when interim prostheses are worn for a long period. Discoloration of provisional restorative materials may result in patient dissatisfaction and additional time and expense for replacement. However, the effect of different staining agents on the color difference of resin composite restorative materials has not been completely clarified.
The purpose of this study was to evaluate the stainability of auto- and light-polymerized composite provisional restorative materials, reinforced microfill, and microhybrid resin composite restorative materials upon exposure to different staining agents.
Forty-five cylindrical specimens (15 x 2 mm) were prepared for each of an autopolymerized bis-acryl composite provisional restorative material (Protemp II), a light-polymerized composite provisional restorative material (Revotek LC), a reinforced microfill (Micronew), and a microhybrid composite (Filtek Z250, Herculite XRV) restorative material, using a brass mold. The specimens were wet-ground with 1000-grit silicon carbide abrasive paper for 10 seconds. The 5 restorative material specimens were divided into 9 groups (n = 5) and stored for 24 hours at 37 degrees C in different types of solutions: water, coffee, coffee with sugar, tea, tea with sugar, coffee with artificial creamer and sugar, cola, red wine, or sour cherry juice. Color of all specimens was measured before and after exposure with a colorimeter using CIE L * a * b * relative, and color changes (DeltaE * ) were then calculated. The data were analyzed with a 2-way analysis of variance (ANOVA), and mean values were compared by the Tukey HSD test (alpha = .05).
The interaction of provisional restorative materials and staining agents was statistically significant ( P = .0001). For the 5 restorative materials tested, the lowest DeltaE * values were observed in the water, cola, and sour cherry juice groups. The highest color difference for all restorative materials was observed in the red wine groups. For microhybrid composite materials and light-polymerized composite provisional material, when tea and coffee groups with and without sugar were compared, both groups with sugar demonstrated a higher color difference than without sugar. When comparing the 5 different restorative materials, the reinforced microfill material group (Micronew) demonstrated significantly less color change than the other materials tested. The highest color difference in this study was observed for specimens in the light-polymerized composite provisional material group (Revotek LC).
The reinforced microfill restorative material tested was found significantly more color stable than the autopolymerized bis-acryl, light-polymerized composite provisional restorative materials, and microhybrid composites tested. The largest color difference was observed in the light-polymerized composite provisional material. The presence of sugar in coffee and tea increased the color difference compared to coffee or tea without sugar for light-polymerized composite provisional material and microhybrid composites.
当临时修复体长时间佩戴时，用于临时修复的牙齿颜色修复材料抵抗污渍的能力很重要。临时修复材料的变色可能导致患者不满以及更换的额外时间和费用。然而，不同染色剂对树脂复合材料修复材料颜色差异的影响尚未完全阐明。
本研究的目的是评估自聚合和光聚合复合临时修复材料、增强型微填料和微混合树脂复合修复材料在暴露于不同染色剂后的可染色性。
使用黄铜模具，为自聚合双丙烯酸复合临时修复材料（Protemp II）、光聚合复合临时修复材料（Revotek LC）、增强型微填料（Micronew）和微混合复合材料（Filtek Z250、Herculite XRV）修复材料各制备45个圆柱形试件（15×2毫米）。试件用1000目碳化硅砂纸湿磨10秒。将5种修复材料试件分为9组（n = 5），并在37℃下于不同类型的溶液中储存24小时：水、咖啡、加糖咖啡、茶、加糖茶、加人工奶精和糖的咖啡、可乐、红酒或酸樱桃汁。使用CIE L * a * b *相对色度计在暴露前后测量所有试件的颜色，然后计算颜色变化（ΔE *）。数据采用双向方差分析（ANOVA）进行分析，平均值通过Tukey HSD检验进行比较（α = .05）。
临时修复材料和染色剂之间的相互作用具有统计学意义（P = .0001）。对于所测试的5种修复材料，在水、可乐和酸樱桃汁组中观察到最低的ΔE *值。在红酒组中观察到所有修复材料的最大颜色差异。对于微混合复合材料和光聚合复合临时材料，比较加糖和不加糖的茶和咖啡组时，加糖的两组均显示出比不加糖的组更高的颜色差异。比较5种不同的修复材料时，增强型微填料材料组（Micronew）的颜色变化明显小于其他测试材料。在本研究中，光聚合复合临时材料组（Revotek LC）的试件观察到最大的颜色差异。
所测试的增强型微填料修复材料比所测试的自聚合双丙烯酸、光聚合复合临时修复材料和微混合复合材料具有明显更高的颜色稳定性。在光聚合复合临时材料中观察到最大的颜色差异。与不加糖的咖啡或茶相比，咖啡和茶中糖的存在增加了光聚合复合临时材料和微混合复合材料的颜色差异。
