声波牙刷刷牙时间与儿童牙菌斑控制的关系

目的观察声波牙刷刷牙不同时间儿童牙菌斑控制的效果，为临床口腔卫生指导及儿童牙病预防提供理论依据。方法选择年龄4～5岁的儿童32例，在刷牙前进行菌斑染色，采用声波牙刷刷牙0．5、1．0、2．0及3．0min，分别记录菌斑牙面数及菌斑指数，计算菌斑百分率。结果应用声波牙刷刷牙2．0min，菌斑百分率（14．81％）可达基本控制范围内。刷牙0．5、1．0及2．0min时菌斑百分率及菌斑指数与刷牙前比较差异均有统计学意义（x2=91．84～730．80，F=76．692，P〈0．05）；刷牙3．0min与刷牙2．0min相比，菌斑百分率及菌斑指数差异无统计学意义（P〉O．05）。结论声波牙刷对儿童牙菌斑控制有良效；建议儿童在专业口腔卫生指导下用声波牙刷刷牙每次2．0min。

RELATIONSHIP BETWEEN TOOTHBRUSHING TIME AND CONTROL OF DENTAL PLAQUE 1N CHILDREN USING SONIC TOOTHBRUSHES

Objective To investigate the dental plaque control in children by using sonic toothbrushes to brush their teeth for different time and provide theoretical basis for clinical oral hygiene instruction and dental prophylaxis. Methods Thirty-two children aged 4--5 years were enrolled in the study. Their dental plaques were stained before toothbrushing, and then to clean their teeth with a sonic brush for 0.5, 1.0, 2.0 and 3.0 rain. The numbers of dental plaque and plaque index （PI） were recorded, and the dental plaque percentage （DPP） calculated. Results Using a sonic tooth brush to clean the teeth for 2.0 rain, the I）PP was 14.81M, which reached the basically control range. Toothbrushing for 0.5,1.0 and 2.0 min, differences of DPP and PI between be- fore and after toothbrushing were statistically significam （ x2 = 91.84 -- 730.80, F = 76. 692, P 〈 0.05 ）. The difference between 3.0 min and 2.0 min toothbrushing was not statistically significant with regard to DDP and PI （P〉0.05）. Conclusion Sonic toothbrush has a good effect on children to control dental plaque. Under professional instruction, using a sonic toothbrush to clean the teeth 2.0 min each time is recommended.