西安市学龄前儿童口腔卫生和龋病关系的调查

目的了解西安市学龄前儿童龋病流行情况以及龋病与口腔卫生的关系，以指导今后乳牙龋病防治工作。方法随机在西安市抽取5所幼儿园，按统一标准对2307名4～6岁学龄前儿童进行龋病检查及口腔卫生评估。结果被调查者乳牙患龋率为56．4％，龋均（2．35±3．049），口腔卫生良好者患龋率明显低于口腔卫生差者。结论学龄前儿童仍为龋病高发年龄，口腔卫生和龋齿发病密切相关，需要增强儿童口腔保健意识以达到促进儿童健康成长。

Study on relationship between dental caries and oral hygiene pre-school children in Xi'an

Objective To investigate the prevalence of caries among pre-school children in Xi' an and the relationship between dental caries and oral hygiene in order to provide the guidance of prevention of caries in deciduous teeth.Methods 5 infant schools in Xi' an were selected randomly.Examination of dental caries and oral hygiene were conducted according to the same standard among 2307 pupils from selected school.Results The caries prevalence rate of deciduous teeth was 56.4% with a mean DMFT of (2.35±3.049).The caries prevalence rate among children who had good oral hygiene was significantly lower than those had bed oral hygiene.Conclusions Prevalence rate of dental caries among pre-school children is high.Oral hygiene is a very important influencing factor of it.It is very important to enhance awareness of oral health to improve the health for children.