Thevissen E, Quirynen M, van Steenberghe D
Department of Periodontology, School of Dentistry, Faculty of Medicine, Catholic University Leuven, Belgium.
J Periodontol. 1987 Dec;58(12):861-7. doi: 10.1902/jop.1987.58.12.861.
The plaque-removing effect of a convex-shaped multitufted brush was compared with that of a conventional flat multitufted brush. Two group (five and seven dental students, respectively), well instructed in the modified Bass technique, participated in a blind, splitmouth, crossover study during two consecutive experimental periods of 96 hours of undisturbed plaque growth. After each of these periods, a supervised brushing session was performed, followed by toothpick utilization. Plaque removal was evaluated using the modified Navy Plaque Index (MNPI) and planimetry. A 4% erythrosin solution was used as a disclosing agent. Planimetrically, the flat Oral B brush appeared significantly more effective than the convex shaped Ph brush (P less than 0.001). This superiority was even enhanced after the use of toothpicks (P less than 0.0005). The differences between the brushes, however, were too small to be detected by the less discriminating MNPI. Although it has been claimed that the convex brush could assure approximal plaque control, the results indicate that for the convex-shaped, as well as for the flat brush, an approximal aid is essential for good plaque control. The hypothesis that the design of the convex-shaped brush could facilitate the modified Bass technique for the average patient could not be proven in this study.
将凸形多束刷毛牙刷的除菌斑效果与传统的扁平多束刷毛牙刷进行了比较。两组（分别为五名和七名牙科学生）在改良的巴斯刷牙法方面接受了良好的指导，参与了一项双盲、左右对照、交叉研究，该研究在两个连续的实验期内进行，每个实验期菌斑不受干扰地生长96小时。在每个实验期之后，进行一次有监督的刷牙环节，随后使用牙签。使用改良海军菌斑指数（MNPI）和面积测量法评估菌斑清除情况。使用4%的赤藓红溶液作为染色剂。通过面积测量法，扁平的欧乐B牙刷似乎比凸形的Ph牙刷显著更有效（P小于0.001）。使用牙签后，这种优势甚至更加明显（P小于0.0005）。然而，两种牙刷之间的差异太小，无法被区分度较低的MNPI检测到。尽管有人声称凸形牙刷可以确保邻面菌斑的控制，但结果表明，对于凸形牙刷和平扁牙刷而言，使用邻面清洁辅助工具对于良好的菌斑控制至关重要。在本研究中，凸形牙刷设计能够方便普通患者使用改良巴斯刷牙法这一假设未能得到证实。
