Department of Restorative Dentistry, School of Dentistry, Federal Fluminense University, Campus Valonguinho, Niterói, RJ, Brazil.
Oper Dent. 2010 Jan-Feb;35(1):105-11. doi: 10.2341/09-080-L.
This in vitro study evaluated the effect of mouth rinses on salivary sorption (Sp), solubility (Sl) and surface degradation of a nanofilled (Z350) and hybrid (P60) resin composite. Specimens (6 mm in diameter and 1 mm thick) of a nanofilled and hybrid resin composite were immersed in artificial saliva at 37 degrees C for seven days. Twice a day, the samples (n = 5) were immersed in 20 ml of three mouth rinses: Listerine, Plax Mint and Plax. A control group was maintained in artificial saliva. Sp and Sl were evaluated based on ISO 4049:2000(E) and surface degradation by scanning electron microscopy-SEM. The degree of conversion (DC%) of resin composites was obtained by using an FT-IR spectrometer equipped with an attenuated total reflectance crystal (ATR). The data were analyzed using the Student's t-test, ANOVA and Tukey test for multiple comparisons. No significant difference in DC% was found between the two resin composites (p < 0.05). The highest sorption rate was presented by the nanofilled composite exposed to Listerine (p < 0.05). The hybrid composite in the control group (artificial saliva) and Plax presented the lowest sorption (p < 0.05). The highest solubility was presented by the two resin composites exposed to Listerine (p < 0.05). SEM analysis showed that mouth rinses produced more severe surface degradation in the nanofilled composite.
本体外研究评估了漱口对纳米复合（Z350）和混合复合（P60）树脂的唾液吸附（Sp）、溶解度（Sl）和表面降解的影响。将纳米复合和混合复合树脂的试件（直径 6 毫米，厚 1 毫米）浸入 37°C 的人工唾液中 7 天。每天两次，将样本（n = 5）浸入 20 毫升三种漱口水中：李斯德林、普乐士薄荷和普乐士。对照组保持在人工唾液中。根据 ISO 4049：2000(E)评估 Sp 和 Sl，通过扫描电子显微镜-SEM 评估表面降解。使用配备衰减全反射晶体（ATR）的 FT-IR 光谱仪获得树脂复合材料的转化率（DC％）。使用 Student's t 检验、方差分析和 Tukey 多重比较检验对数据进行分析。两种树脂复合材料的 DC％之间没有显著差异（p < 0.05）。暴露于李斯德林的纳米复合材料表现出最高的吸附率（p < 0.05）。在对照组（人工唾液）和普乐士中，混合复合材料的吸附率最低（p < 0.05）。暴露于李斯德林的两种树脂复合材料表现出最高的溶解度（p < 0.05）。SEM 分析表明，漱口液在纳米复合材料中产生了更严重的表面降解。
