1998年 5月对临沂市实验中学学生龋齿情况进行调查。本次调查按全国“龋齿、牙周病调查统一规定”抽取城内实验中学中的 1685名学生。本次受检1685人 ,龋齿 2 8人 ,龋患率 1 66%。其中男生龋患率为 0 92 % ( 8/ 866) ,女生龋患率为 2 4 4 % ( 2 0 / 819) ,二者相比差异有显著 In May 1998, we investigated the dental caries of students in experimental middle schools in Linyi City. According to the National Uniform Regulations on Dental Caries and Periodontal Diseases, the survey collected 1,685 students in the experimental middle school in the city. 1685 people were examined and 28 were caries. The attack rate was 1 66%. Male attack rate was 92% (8/866) and female attack rate was 24.4% (20/819). There was a significant difference between the two groups.