...的牙 不记分 不记分一个龋失牙 M（m）1 后牙M（m）5 前牙M（m）4 2010-7-8一、龋 病 指 数 3、患龋率（caries prevalence rate） 指在调查期间某人群中患龋病的频率，常以百分数表示。
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Methods We have examine 743 Preschool Children,434 from a nursery school and live in town,another 305 live in village,count caries prevalence rate,dental caries average and analysis the influence of brush teeth to dental caries.
方法对旗政府所在地的1所幼儿园434名和5个乡镇农牧区305名学龄前儿童进行口腔检查,统计患龋率、龋均及刷牙对龋病的影响。
参考来源 - 743名学龄前儿童乳牙龋病患病情况调查及防治·2,447,543篇论文数据，部分数据来源于NoteExpress
There is a high prevalence rate of early childhood caries(ECC), and it results from a multiplication of risk factors, including different hosts, microorganisms and inappropriate behaviors.
儿童早期龋（ECC）的患病率一直居高不下，其发生是宿主因素、生物学因素和行为因素等多因素作用的结果。
RESULTS: The indexes of the prevalence rate of dental caries , caries average, GI, OHI-sin the experimental group after teeth brushing education were better than in the control group (P<0.01).
结果：实验组刷牙教育后患龋率、龋均、牙龈指数、简化口腔卫生指数均低于对照组，差异显著（P<0.01）。
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