Lim B S, Moon H J, Baek K W, Hahn S H, Kim C W
Department of Dental Biomaterials, College of Dentistry, Seoul National University, Korea.
Am J Dent. 2001 Aug;14(4):241-6.
To evaluate the degree of color stability of glass-ionomers (GIs) and polyacid modified resin-based composites (PMRBCs) in various environmental solutions.
Seven polyacid-based esthetic restorative materials were used: three chemical-cured GIs, one resin-modified GI and three polyacid-modified RBCs. A light-cured resin-based composite (RBC) (Z 100) was used as a control. Disk type specimens were prepared and were aged in four different solutions (deionized water, 0.1 mole acetic acid solution, 75% ethanol, and 10% hydrogen peroxide solution) for 1, 7, 14, 21, 28, and 56 days. The specimens were kept at 37 degrees C throughout the study. Color coefficients (CIE Lab*) were measured by a reflection spectrophotometer with SCE mode, and the surface of specimens was examined by a stereo zoom microscope.
In deionized water, all specimens showed an acceptable color stability. All of the GIs and PMRBCs showed significant color change in 0.1 mole acetic acid solution. The light-cured resin-modified GI showed a significant color change in 75% ethanol solutions. 10% hydrogen peroxide solution resulted in degradation and a high degree of color change for chemical-cured GIs. The light-cured resin-modified GI and PMRBCs showed high color change in 10% hydrogen peroxide solution. The light-cured RBC (Control), showed excellent color stability in all experimental solutions.
评估玻璃离子水门汀（GIs）和聚酸改性树脂基复合材料（PMRBCs）在各种环境溶液中的颜色稳定性程度。
使用了七种基于聚酸的美学修复材料：三种化学固化的GIs、一种树脂改性的GI和三种聚酸改性的RBCs。使用光固化树脂基复合材料（RBC）（Z 100）作为对照。制备圆盘形试件，并将其在四种不同溶液（去离子水、0.1摩尔乙酸溶液、75%乙醇和10%过氧化氢溶液）中老化1、7、14、21、28和56天。在整个研究过程中，试件保持在37摄氏度。通过具有SCE模式的反射分光光度计测量颜色系数（CIE Lab*），并通过立体变焦显微镜检查试件表面。
在去离子水中，所有试件均表现出可接受的颜色稳定性。所有的GIs和PMRBCs在0.1摩尔乙酸溶液中均表现出显著颜色变化。光固化树脂改性的GI在75%乙醇溶液中表现出显著颜色变化。10%过氧化氢溶液导致化学固化的GIs降解并出现高度颜色变化。光固化树脂改性的GI和PMRBCs在10%过氧化氢溶液中表现出高度颜色变化。光固化RBC（对照）在所有实验溶液中均表现出优异的颜色稳定性。
