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目的了解新疆大学生恒牙先天缺失的状况。方法 2008年9月~2009年5月对新疆高校学生共5 150名采取随机、分层、整群抽样的方法进行恒牙发育异常情况的调查。对患病率、颌位情况、缺牙数目、好发牙位及同时伴发2种牙齿发育异常的情况进行分析。结果恒牙先天缺失的总患病率为5.98%,无性别差异;颌位情况下颌缺失多于上颌(P<0.05);好发牙位为下颌中切牙;以缺失1颗牙者最多见,占总人数的63.96%;锥形牙与先天缺牙伴发的比率高,达68.29%。结论新疆大学生恒牙先天缺失的状况与以往的研究相符,但性别间无差异,下颌缺牙数目多于上颌。
Objective To understand the congenital absence of permanent tooth in Xinjiang college students. Methods From September 2008 to May 2009, 5 150 students from Xinjiang colleges and universities were investigated by randomized, stratified and cluster sampling methods. The prevalence, jaw position, the number of missing teeth, good teeth and accompanied by two kinds of tooth development abnormalities were analyzed. Results The total prevalence rate of congenital absence of permanent teeth was 5.98%, with no gender difference. The maxillary position was less than that of the maxilla in maxillary position (P <0.05) , Accounting for 63.96% of the total number. The ratio of conical teeth to those with congenital edentulous teeth was high, reaching 68.29%. Conclusions The congenital absence of permanent tooth in Xinjiang college students is consistent with previous studies. However, there is no difference among the sexes. The number of missing teeth in the lower jaw is more than that in the upper jaw.