Preber H, Ylipää V, Bergström J, Rydén H
Department of Periodontology, Karolinska Institutet, Stockholm, Sweden.
Swed Dent J. 1991;15(5):229-34.
Plaque removing efficiency was compared between rotary electric and manual toothbrushes. The first part of the study included 19 dental hygiene students randomly assigned to a "rotary" or a "manual" brushing group. The subjects were instructed to brush their teeth three minutes twice a day for three weeks either with rotary electric or with manual brushes. Then for another period of three weeks brushing techniques were reversed. The results showed that the median plaque index for all sites and for buccal and lingual sites was significantly lower in the rotary brushing group (28% vs 39% and 3% vs 6%, p less than 0.05). During the second part of the study 10 of the students refrained from all oral hygiene procedures for four weeks in the anterior mandibular region, i.e. from 33 to 43. They were then randomly assigned to a "rotary" or a "manual" brushing group. Registrations of accumulated plaque were made from photographs at baseline and after 15, 30 and 60 seconds of brushing. ANOVA analysis of the plaque scores showed a significant difference in reduction of plaque in favour of the rotary electric brush (p less than 0.01). The results suggest that the rotary electric toothbrush removes plaque more efficiently than the conventional manual toothbrush.
比较了旋转电动牙刷和手动牙刷去除牙菌斑的效率。研究的第一部分包括19名口腔卫生专业学生，他们被随机分配到“旋转”或“手动”刷牙组。受试者被要求每天用旋转电动牙刷或手动牙刷刷牙两次，每次三分钟，持续三周。然后在接下来的三周内，刷牙方式互换。结果显示，旋转刷牙组所有部位以及颊侧和舌侧部位的菌斑指数中位数显著更低（分别为28%对39%以及3%对6%，p<0.05）。在研究的第二部分，10名学生在前下颌区域四周内不进行任何口腔卫生措施，即从第33颗牙到第43颗牙。然后他们被随机分配到“旋转”或“手动”刷牙组。在基线以及刷牙15秒、30秒和60秒后，通过照片记录累积菌斑情况。对菌斑评分的方差分析显示，在减少菌斑方面，旋转电动牙刷有显著差异（p<0.01）。结果表明，旋转电动牙刷比传统手动牙刷去除牙菌斑的效率更高。
