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牙周疾病是危害中小学生口腔健康的常见病、多发病。为了解我市维吾尔族、汉族中小学生牙周疾病的流行情况，以便采取措施保护中小学生口腔健康，做好学校卫生工作，我们于1998年5月对克市中小学生进行抽样调查。现将结果报道如下。1对象与方法1．1对象：采取分层整群抽样方法
Periodontal disease is a common disease that often endangers the oral health of primary and secondary school students. In order to understand the epidemic situation of periodontal diseases among primary and secondary school students in Uighur and Han in our city in order to take measures to protect the oral health of primary and secondary school students and do a good job in school hygiene, we conducted a sample survey on primary and secondary school students in Ke City in May 1998. The results are reported below. 1 objects and methods 1.1 Object: Take a hierarchical cluster sampling method