Cavalcanti Andrea Nóbrega, Mitsui Fabio Hiroyuki Ogata, Ambrosano Glaucia Maria Bovi, Mathias Paula, Marchi Gisell Maria
Department of Restorative Dentistry, Piracicaba School of Dentistry, UNICAMP, SP, Brazil.
Am J Dent. 2005 Dec;18(6):338-40.
To evaluate the effect of mouthrinses on Knoop hardness number (KHN) of a restorative composite, at different exposure times.
50 composite specimens (TPH Spectrum) were randomly allocated into five groups (n=10): distilled water; Listerine; Reach; Plax and Periogard. The samples were immersed daily for 14 days in 20 ml of the respective solution for 2 minutes twice a day (with a 12-hour interval between exposures). Measurements were carried out at four different times: 1 hour after sample preparation, 1, 7 and 14 days after the first immersion in the solutions.
Statistical analyses (Repeated Measures ANOVA and Tukey test at 0.05 significance level) showed significant differences among KHN of t wo experimental groups (mean values): Listerine (49.17) and Plax (51.14). There was n ointeraction between products and time, although the highest means were registered 24 hours after the first immersion for all tested groups.
评估在不同暴露时间下，漱口水对一种复合树脂修复材料努氏硬度值（KHN）的影响。
50个复合树脂样本（TPH Spectrum）被随机分为五组（n = 10）：蒸馏水组；李施德林漱口水组；Reach漱口水组；Plax漱口水组和Periogard漱口水组。样本每天浸泡在20毫升相应溶液中两次，每次2分钟（两次浸泡间隔12小时），持续14天。在四个不同时间进行测量：样本制备后1小时、首次浸泡溶液后1天、7天和14天。
统计分析（重复测量方差分析和0.05显著性水平的Tukey检验）显示，两个实验组的KHN（平均值）存在显著差异：李施德林漱口水组（49.17）和Plax漱口水组（51.14）。产品和时间之间没有交互作用，尽管所有测试组在首次浸泡后24小时记录到最高平均值。
