Objective To investigate the status of dental caries on the pupils in Xinqing District of Yinchuan and get the development characteristics.Methods The incidence of dental was investigated in 6167pupils selected from 5 primary schools in Xinqing District of Yinchuan.The pupils(6 to 12 years old) were randomly assigned to seven groups and were analyzed.Results Prevalence rate of the pupils in Xingqing District of Yinchuan from 6 to 12 years old was 42.74%.And the DMFT was 2.11.Prevalence rate was 41.06% and 4...