北京市西城区龋病的社区诊断

按多阶段分层随机抽样原则在西城区目标社区中抽取35～74岁居民1162名，由3名医生做龋齿检查。受检人群中患冠龋925人，冠龋患病率为79．6％，龋面均为24．39。受检人群根龋指数为3．5％。在牙齿水平上，接受冠龋检查的32536颗牙齿中有7267颗患冠龋，冠龋治疗需要率为22．3％；接受根龋检查的16604颗牙齿中有4317颗患根龋，根龋治疗需要率为26．0％。在个体水平上，龋面均与根龋指数呈显著相关性（P〈0．01）。男女之间龋面均和根龋指数的差异均无统计学意义。说明北京市西城区目标社区中老年人龋齿患病严重，需建立社区口腔卫生服务体系来控制龋齿的发生。

Community diagnosis of dental caries in an urban community of Beijing

Total 1188 subjects aged 35-74 in an urban community of Beijing were recruited by a multistage stratified random sampling procedure. Dental caries were examined by three dentists independently. The prevalence of dental crown caries was 79. 6% (DF), that of DMFS was 24. 39% and the root caries index (RCI) was 3.5% in this group. 22. 3% of the examinees required treatment for the crown caries and 26. 0% for root caries. Bivariate correlation analysis showed that DMFS was significantly correlated with RCI (P <0. 01 ), and there was no significant difference of DMFS and RCI between males and females. The study indicates that dental caries is a common health problem in adults and elderly population of urban Beijing, and the development of community oral health service system is necessary.