目的

探讨广西南宁民办幼儿园儿童龋活跃性（CA）相关因素。

方法

采用前瞻性自身对照研究，于2008 年、2009 年对南宁市3 所民办幼儿园184 名3 ～6 岁儿童进行龋病检查和有关饮食习惯、口腔卫生习惯和家庭情况的问卷调查，调查新增乳牙龋失补牙面数（dmfs）。采用χ² 检验、t 检验、Spearman 相关分析及多元回归分析等方法分析新增dmfs 的影响因素。

结果

184 名受调查幼儿2 次调查患龋率分别为57.1%和76.1%，dmfs 分别为5.02 ± 7.49和12.05 ± 13.00。 受试幼儿园儿童1 年之中的患龋率增长，经χ² 检验，差异有统计学意义（P ＜0.001），dmfs 增长较明显，t 检验差异有统计学意义（P ＜0.001）。 两次均接受检查的儿童1 年中新增dmfs 的比例为7.08 ± 8.30。 多因素分析显示受试者基线dmfs、睡前进食、牛奶或饮用水加糖是1 年中新增dmfs 的主要影响因素。

结论

幼儿CA 与受试者龋坏程度、既往龋坏情况、睡前进食、牛奶或饮用水加糖有关，提示幼儿龋病预防工作从这几方面干预的可能性。

Objective

To investigate the risk factors related to caries activity（CA） among pre-school children in private kindergartens in Nanning.

Methods

A one-year longitudinal study was carried out to detect the new decays among 184 pre-school children aged 3 ～6 years from three private kindergartens in Nanning. Caries risk assessment by decay missing filling surface （dmfs），oral examination and questionnaire survey of dietary habits， oral health habits， family condition were included in this study. χ²-test， t-test， spearman dependence analysis and multiple regression analysis were used to analyze the risk factors.

Results

The prevalence of caries was 57.1% and 76.1%， and dmfs were 5.02 ± 7.49 and 12.05 ± 13.00 respectively at the baseline and end point of this study. The prevalence of caries and dmfs in pre-school children increased significantly during one-year follow-up （P ＜0.001）. The dmfs increased by 7.08 ± 8.30. Multivariate analysis indicated that the risk factors related with dmfs included the baseline dmfs， food intake before bed and habit of adding sugar to milk or drinking water.

Conclusions

The caries activity related factors of pre-school children include the severity of pre-existed caries， food intake before bed and the habit of adding sugar to milk or drinking water. It is suggested that the intervention measures be taken for pre-school children.