新疆5150名大学生恒牙先天缺失的调查分析

Oligodontia in permanent teeth of 5150 students in Xinjiang

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 study the status of oligodontia in permanent teeth of the undergraduates in Xinjiang.Methods A survey of odontodysplasia in permanent teeth was carried out in 5 150 college students in Xinjiang with the method of random,stratified,cluster sampling during Semptember 2008~ May 2009.The prevalence rate,the status of maxillomandibular and associated,number of missing,location predilection were analyzed.Results The prevalence of oligodontia was 5.98 %,no diversity between the sex.Mandible more than maxilla in the number of missing teeth（P0.05）,the center incisor is the location predilection;miss 1 tooth（63.96%） and oligodontia coincident with conic shaped tooth（68.29%） was the situation which most occurred.Conclusion The result of oligodontia by undergraduate in Xinjiang is similar to the other reports.But there is no diversity between the sex and the number of missing teeth is mandible more than maxilla.