Abstract:

Objective　To explore the caries status of permanent teeth among 12-15-year-old population in Liaoning Province，and provide data support for the prevention and treatment of dental caries. Methods　A total of 3836 urban and rural residents aged 12，13，14 and 15 in Liaoning Province were selected by multi-stage stratified equal capacity random sampling. According to the criteria of clinical dentition examination of the Fourth National Epidemiological Survey of Oral Health，the crown caries of permanent teeth in the whole mouth were examined using CPI probe. And then the prevalence，the mean DMFT（decayed-missing-filled tooth），the filled rate，the site of caries and the pit and fissure sealing were calculated. The difference was compared. Results　The prevalance of crown caries in the groups aged 12，13，14 and 15 were 53.2%，49.7%，53.7% and 56.6%，respectively. There was no significant difference between the 12-year-old group and the 14-year-old group，and the differences among the other age groups were statistically significant（P＜0.05）.The mean DMFT was 1.45，1.56，1.67 and 1.85，respectively，and it increased with age（P＜0.05）. There were significant differences in the prevalence and the mean DMFT between urban and rural areas（P＜0.05）and between male and female（P＜0.05）. The prevalence and the mean DMFT of 12-year old group were higher than that in 2005. Conclusion　The prevalence of permanent teeth caries in12-15-year-old population in Liaoning Province is higher than the national average level，and it is higher than in rural areas than in urban areas，higher in females than in males. It is necessary to further strengthen oral prevention and health care measures for the relevant population.

Key words: the Fourth National Epidemiological Survey of Oral Health, adolescent, permanent teeth, dental caries

摘要：

目的　了解辽宁省12～15岁人群恒牙龋病状况，为辽宁省口腔健康保健工作及相关研究提供数据支持。方法　采用多阶段分层等容量随机抽样的方法，抽取辽宁省12、13、14、15岁城乡常住人口共3836人。按照第四次全国口腔健康流行病学调查方案的牙列检查方法和标准，使用社区牙周指数（CPI）探针检查全口恒牙冠龋患情况。计算患龋率、龋均、充填率、患龋牙位及窝沟封闭情况，并比较存在的差异。结果　辽宁省12、13、14和15岁人群患龋率分别为 53.2%、49.7%、53.7%和 56.6%，12岁年龄组与14岁年龄组差异无统计学意义，其余各年龄组间差异均有统计学意义（P＜0.05）； 龋均分别为1.45、1.56、1.67 和 1.85，随着年龄增加而增加，差异有统计学意义（P＜0.05）；患龋率和龋均两项指标城乡间比较，农村高于城市，差异有统计学意义（P＜0.05）；不同性别间比较，女性高于男性，差异有统计学意义（P＜0.05）。与2005年第三次全国口腔健康流行病学调查结果相比，12岁人群患龋率和龋均均升高。结论　辽宁省 12～15 岁人群患龋率和龋均高于全国平均水平，农村高于城市，女性高于男性，需进一步加强相关人群的口腔预防保健措施。

关键词: 第四次全国口腔健康流行病学调查, 青少年, 恒牙, 龋病