PURPOSE To provide theoretical basis for children's oral health instruction and children's dental prophylaxis by comparing the plaque control efficacy and safety of Sonicare and manual toothbrush in 3-9 years old children. METHODS One hundred and eighty healthy children were included in this study and were divided into 2 groups with 90 children in each group: aged 3-6 years and 6-9 years respectively. In each group, the subjects were randomly instructed to use either Sonicare for kids (SFK) or manual tooth brush (MTB). During a 28-day clinical trial period, oral hygiene was examined and plaque index（Rustogi modified Navy plaque index，RMNPI） was recorded at baseline, and at visits on the 7th and the 28th day (D0, D7, D28). The data were analyzed by R software. RESULTS Both MTB and SFK could remove a certain amount of dental plaque. In the group of 3-6 years old children, the plaque reduction rates of children using SFK were 17.09%±14.4%(D0), 27.14%±11.4%(D7), 33.52%±18.3%(D28), respectively, which were significantly higher than that of children using MTB [11.86%±9.7%(D0), 11.83%±9.1%(D7), 13.73%±11.0%（D28）] (P<0.05). Similarly, in the group of 6-9 years old children, the plaque reduction rates of children using SFK were 20.05%±10.52%(D0), 22.76%±13.46%(D7), 22.31%±9.74% (D28), which were significantly higher than that of children using MTB [9.15%±7.07%(D0), 7.26%±6.81%(D7), 11.54%±8.27%（D28）] (P<0.05). Further analysis revealed that the plaque index was decreased gradually in 3-6 years old children using SFK after 3 months of follow-up (P<0.05). In addition, there was better compliance and safety in children using SFK. CONCLUSIONS Sonicare can remove plaque efficiently, and can control plaque and improve oral hygiene quality effectively in children in a long period, which implies that the application of Sonicare is worthy of promoting to control dental plaque in children.

中文翻译：

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Sonicare牙刷对儿童牙菌斑控制的有效性和安全性的临床研究

目的通过比较Sonicare和手动牙刷在3-9岁儿童中的牙菌斑控制功效和安全性，为儿童的口腔健康指导和儿童的牙齿预防提供理论依据。方法将180名健康儿童纳入研究，将其分为2组，每组90名儿童：年龄分别为3-6岁和6-9岁。在每组中，随机指示受试者使用Sonicare儿童用（SFK）或手动牙刷（MTB）。在为期28天的临床试验期间，检查了口腔卫生状况，并在基线以及第7天和第28天就诊时（D0，D7，D28）记录了斑块指数（Rustogi改良海军斑块指数，RMNPI）。数据通过R软件分析。结果MTB和SFK均可清除一定量的牙菌斑。在3-6岁的儿童组中，使用SFK的儿童的牙菌斑减少率分别为17.09％±14.4％（D0），27.14％±11.4％（D7），33.52％±18.3％（D28），明显高于MTB患儿[11.86％±9.7％（D0），11.83％±9.1％（D7），13.73％±11.0％（D28）]（P <0.05）。同样，在6-9岁的儿童组中，使用SFK的儿童的牙菌斑减少率分别为20.05％±10.52％（D0），22.76％±13.46％（D7），22.31％±9.74％（D28），明显高于使用MTB的儿童[9.15％±7.07％（D0），7.26％±6.81％（D7），11.54％±8.27％（D28）]（P <0.05）。进一步的分析显示，在3个月的随访中，使用SFK的3-6岁儿童的斑块指数逐渐降低（P <0.05）。此外，使用SFK的儿童有更好的依从性和安全性。