上海地区青少年第三磨牙发育状况的研究  

The development of the third molar in Shanghai teenagers

作　　者：杨启祥[1] 沈韵[1] 徐远志[1] 徐琛媛[1] 唐小山[1] 王璟[1] 

机构地区：[1]同济大学附属第十人民医院口腔科,上海200072

出　　处：《安徽医科大学学报》2015年第2期235-239,共5页Acta Universitatis Medicinalis Anhui

基　　金：上海市自然科学基金(编号:12ZR1423500);上海市卫生局青年科研项目(编号:20124Y049)

摘　　要：目的通过数字化曲面断层片影像对上海地区青少年第三磨牙的发育状况进行研究,为口腔基础、临床应用和牙齿法医学的研究提供参考资料。方法采用改良的Demirjian分类法对1 440名上海地区青少年所拍摄的数字化曲面断层片中第三磨牙进行分析,比较不同性别、不同部位之间的分布差异,总结上海地区青少年第三磨牙的发育状况。结果上海地区青少年在5岁时第三磨牙开始发育。女性第三磨牙18和28的出现频率明显高于男性(P<0.05)。结论上海地区青少年第三磨牙出现频率及牙冠发育完成时间与中国其他地区人口不同。Objective To provide reference data about the development of the third molars of Shanghai juveniles and adolescents. Methods A total of 1 440 digital panoramic radiographs of adolescents in Shanghai area were ex-amined. The mineralization status of the third molars was assessed using the formation stages described by Demir-jian with two modifications. Results The development of third molars in the Shanghai population was likely to be-gin at age 5 in both males and females. The third molars 18 and 28 showed significantly higher frequency in females than in males（P〈0. 05）. Conclusion The frequency and age reaching complete crown calcification of third mo-lars in Shanghai population is different from that in population from other regions of China.

关 键 词：第三磨牙 上海地区 DEMIRJIAN法 数字化曲面断层片 

分 类 号：R780.2[医药卫生—口腔医学]