Chestnutt I G, Schäfer F, Jacobson A P, Stephen K W
Lanarkshire Health Board, Hamilton, Scotland.
Community Dent Oral Epidemiol. 1998 Dec;26(6):406-11. doi: 10.1111/j.1600-0528.1998.tb01979.x.
To examine the effect of reported toothbrushing frequency and method of rinsing after brushing on caries experience and increment.
Data are presented from 2621 adolescents (mean age 12.5 years at outset) participating in a 3-year double-blind caries clinical trial. At baseline, examiners questioned each participant about their toothbrushing habits, and at subsequent examinations, this information was obtained using a self-administered computer-based questionnaire. Participants used a fluoride-containing dentifrice throughout and clinical examinations were conducted using a mirror, CPITN probe and fibre-optic transillumination.
The reported brushing frequency increased throughout the trial. Caries experience at baseline was inversely related to toothbrushing frequency with mean DMFS=9.66, 8.12 and 7.63 respectively for <1/day, 1/day and >1/day brushers (P<0.001). Mean 3-year DMFS increments of 8.90, 6.63 and 5.48 (P<0.01) were observed in those reporting to brush <1/day, 1/day or >1/day, on not less than two of the three clinical examinations during the trial. Caries increment was also significantly related to the claimed method used to rinse post-brushing. Overall frequency of brushing and rinsing method accounted for over 50% of the explained variance in the ANOVA model used to analyse the DMFS increments.
Stated toothbrushing frequency and rinsing method after brushing were found to be strongly correlated with caries experience and caries increment. These factors should be reflected in the design of oral health education material and taken into account in the design and analysis of caries clinical trials.
探讨报告的刷牙频率及刷牙后漱口方法对龋病患病情况及龋病进展的影响。
数据来自2621名青少年（初始平均年龄12.5岁）参与的一项为期3年的龋病双盲临床试验。在基线时，检查人员询问每位参与者的刷牙习惯，在随后的检查中，通过基于计算机的自填问卷获取该信息。参与者在整个试验过程中使用含氟牙膏，临床检查使用口镜、社区牙周指数（CPITN）探针和光纤透照法。
在整个试验过程中，报告的刷牙频率有所增加。基线时的龋病患病情况与刷牙频率呈负相关，每天刷牙少于1次、1次和多于1次的参与者，其平均龋失补牙面数（DMFS）分别为9.66、8.12和7.63（P<0.001）。在试验期间的三次临床检查中，至少有两次报告每天刷牙少于1次、1次或多于1次的参与者，其3年平均DMFS增量分别为8.90、6.63和5.48（P<0.01）。龋病进展也与声称的刷牙后漱口方法显著相关。刷牙频率和漱口方法的总体情况在用于分析DMFS增量的方差分析模型中，占解释方差的50%以上。
报告的刷牙频率和刷牙后漱口方法与龋病患病情况及龋病进展密切相关。这些因素应在口腔健康教育材料的设计中得到体现，并在龋病临床试验的设计和分析中予以考虑。
