Van der Weijden F A, Timmerman M F, Snoek I M, Reijerse E, Van der Velden U
Department of Periodontology, Academic Center for Dentistry Amsterdam (ACTA), The Netherlands.
Am J Dent. 1996 Jul;9 Spec No:S31-6.
To test the plaque removing efficacy of three different toothbrushes in relation to duration of toothbrushing.
The brushes studied were the Sonicare, the Braun Plak Remover (D7), and a modified Plak Control with increased speed (D9). Part 1 of the study was divided into four experiments which differed only in respect to the brushing time. The available times were 15, 30, 45, 60 seconds per quadrant. After 48 hours plaque accumulation, all subjects (n = 22) were brushed professionally using at random a brush in one quadrant (without toothpaste). Part 2 was a 3-way cross-over design in which the same three brushes were tested. In total 49, subjects participated. They were given a brief instruction on the use of each toothbrush and were allowed to get familiarized with each brush during a 2-week period. After 48 hours plaque accumulation, they brushed in a random order the four quadrants, each with a different brushing time (15, 30, 45, 60 seconds). The amount of dental plaque was evaluated pre- and post-brushing by means of the Silness & Löe plaque index at six sites around each tooth investigated.
The results of Part 1 and 2 showed an increase in efficacy for all brushes varying from 1 minute per quadrant to 4 minutes per quadrant. In Part 1, the D7 was more effective than the Sonicare brush at 15, 20, 45 seconds whereas the D9 was more effective at all four brushing times. In Part 2, both the D7 and D9 were more effective than the Sonicare at the 2-minute brushing time. These differences were mainly caused by a greater plaque removal from the approximal areas.
测试三种不同牙刷在刷牙时长方面的牙菌斑清除效果。
所研究的牙刷为飞利浦声波震动牙刷、博朗洁牙宝（D7）以及一款提高了速度的改良洁牙对照刷（D9）。研究的第一部分分为四个实验，它们仅在刷牙时间上有所不同。每个象限的可用刷牙时间分别为15、30、45、60秒。在牙菌斑积累48小时后，所有受试者（n = 22）在一个象限使用随机分配的一种牙刷进行专业刷牙（不使用牙膏）。第二部分是一个三向交叉设计，对同样的三种牙刷进行测试。共有49名受试者参与。他们接受了关于每种牙刷使用方法的简要指导，并在两周时间内熟悉每种牙刷。在牙菌斑积累48小时后，他们以随机顺序对四个象限进行刷牙，每个象限的刷牙时间不同（15、30、45、60秒）。通过Silness & Löe菌斑指数在每颗被调查牙齿周围的六个部位对刷牙前后的牙菌斑量进行评估。
第一部分和第二部分的结果表明，所有牙刷的效果都随着每个象限刷牙时间从1分钟增加到4分钟而提高。在第一部分中，在15、20、45秒时，D7比飞利浦声波震动牙刷更有效，而D9在所有四个刷牙时间都更有效。在第二部分中，在2分钟刷牙时间时，D7和D9都比飞利浦声波震动牙刷更有效。这些差异主要是由于邻面区域的牙菌斑清除量更大。
