Department of Dental Materials and Prosthesis, School of Dentistry of Ribeirão Preto, University of São Paulo, Brazil.
Int J Dent Hyg. 2011 Nov;9(4):274-8. doi: 10.1111/j.1601-5037.2011.00502.x. Epub 2011 Jan 30.
This study evaluated the flexibility and abrasion capacity of the bristles of four soft toothbrush brands.
Toothbrushes from groups: 1: Aquafresh Flex; 2: Oral-B Indicator; 3: Colgate Classic; 4: Johnson and Johnson Reach were used for the buckling deformation flexibility assay with of load (40 g) for a 5-s period and the measurement of the diameter of the bristles using a comparison gauge (precision: 1 μm), and for the abrasion assay in a brushing machine in 100-min cycles with a standard dentifrice in a 1:1 solution with distilled water and load of 200 g. The data were normalized due to the difference in the size of the toothbrush heads and analysed by the anova and the Tukey test to adjust for multiple comparisons (α = 0.05).
A significant difference in the flexibility of the bristles (toothbrushes from groups 2, 3 and 4 were more flexible than 1) was observed. There was no correlation between the increase in the diameter of the bristles and the reduction in flexibility. The statistical analysis revealed loss of mass due to abrasion, varying according to the flexibility of the bristles, with group 1 causing lower wear than groups 2, 3 and 4.
The results of this study showed that there are variations in bristle flexibility abrasion potential of soft-classified toothbrushes.
本研究评估了四个软毛牙刷品牌的刷毛柔韧性和耐磨性。
使用Aquafresh Flex、Oral-B Indicator、Colgate Classic 和 Johnson and Johnson Reach 牙刷进行弯曲变形柔韧性测试，施加 40g 的负载持续 5 秒，并使用比较规测量刷毛直径（精度：1μm）；在刷牙机中以 100 分钟为一个周期，使用标准牙膏以 1:1 的比例与蒸馏水混合，负载 200g 进行磨损测试。由于牙刷头部尺寸的差异，对数据进行了归一化处理，并通过方差分析和 Tukey 检验进行分析，以调整多重比较（α=0.05）。
观察到刷毛柔韧性存在显著差异（组 2、3 和 4 的牙刷比组 1 更柔韧）。刷毛直径的增加与柔韧性的降低之间没有相关性。统计分析显示，由于磨损导致质量损失，这与刷毛的柔韧性有关，组 1 的磨损比组 2、3 和 4 更小。
本研究结果表明，软毛牙刷的刷毛柔韧性和磨损潜力存在差异。
