Abstract:  Objective　To compare the caries status and impact factors in 12-year-old children between Baiku Yao and Zhuang as well as Han population in Guangxi. Methods　A cross-sectional study was conducted in Nandan County of Guangxi Province. A total of 1067 children aged 12 participated in this study. Data on demographic characteristics，oral habit and diet were obtained through a questionnaire，and caries data （DMFT） were collected by clinical examination. caries rate，DMFT and the impact factors of caries were compared between Baiku Yao children and Han children as well as Zhuang children and were analyzed. Results　Of all subjects，caries rate was 45.1%，and mean DMFT were 1.04±1.59. The caries rate of Baiku Yao was 38.8%，mean DMFT was 0.79±1.29，lower than that of Zhuang（48.3%，1.19±1.74 ） and Han children（ 51.3%，1.26±1.77） （P < 0.05）.There were statistical differences in parents′ educational background，rate of living at school，frequency of sweet food intake，tooth brushing frequency，carbohydrate-rich food intake between Baiku Yao children and Zhuang as well as Han children （P < 0.05），among which，the frequency of sweet food intake，father's educational background and living in school were the influencing factors of dental caries. Conclusion　The caries rate of Baiku Yao children aged 12 years old is lower than that of Zhuang and Han children. The difference in the frequency of sweet food intake，father's educational background and the rate of residency in school may be the main environmental impact factors.

Key words: dental caries, nation, influencing factors, Guangxi

摘要： 目的　比较广西12岁白裤瑶族与壮族、汉族儿童患龋状况及影响因素，探讨白裤瑶族儿童患龋率较低的原因。方法　随机抽取广西南丹县15所小学的12岁白裤瑶族与壮族、汉族儿童1067人为研究对象，进行口腔检查，记录恒牙龋、失、补牙数（DMFT），通过问卷调查收集人口学特征、口腔卫生习惯、饮食习惯等资料，分析比较3个民族儿童患龋率、龋均及龋病影响因素。结果　受调查总人群患龋率为45.1%、龋均为1.04 ± 1.59。白裤瑶族儿童患龋率和龋均（38.8%、0.79 ± 1.29）低于壮族儿童（48.3%、1.19 ± 1.74）和汉族儿童（51.3%、1.26 ± 1.77）。白裤瑶族12岁儿童父亲学历、母亲学历、是否住校、甜食摄入频率、刷牙频率、碳水化合物摄入频率与壮族、汉族有差异（P < 0.05），其中甜食摄入频率、父亲学历、是否住校是本次调查龋病的影响因素。结论　白裤瑶族12岁儿童患龋率低于同地区壮族、汉族儿童。甜食摄入频率、父亲学历及住校率的差异可能是白裤瑶族患龋率低于壮族、汉族的主要环境影响因素。

关键词: 龋病, 民族, 影响因素, 广西