论文部分内容阅读
Objectives: To investigate the prevalence of deciduous caries in 3~4 years in urban and rural areas, and analyze its influencing factors.Methods: 886 children aged 3 to 4 selected from Changchun city and Dongfeng country of Liaoyuan city by cluster random sampling were investigated for dental caries, and the questionnaires were completed by their parents.The results were statistically analyzed by SPSS 16.0 software package.