解剖学报

解剖学报 ›› 2014, Vol. ›› Issue (2): 283-285.doi: 10.3969/j.issn.0529-1356.2014.02.026

• 人类学 • 上一篇    下一篇

中国现代人群下颌第三磨牙萌出情况的比较

戴成萍 李海军*   

  1. 中央民族大学民族学与社会学学院，北京 100081
  • 收稿日期:2013-08-12 修回日期:2013-10-17 出版日期:2014-04-06 发布日期:2014-04-06
  • 通讯作者: 李海军 E-mail:lihaijunchina@hotmail.com
  • 基金资助:

    国家自然科学基金青年科学基金项目

Eruption comparison of lower third molars of Chinese recent population

DAI Cheng-ping LI Hai-jun*   

  1. School of Ethnology and Sociology, Minzu University of China, Beijing 100081，China
  • Received:2013-08-12 Revised:2013-10-17 Online:2014-04-06 Published:2014-04-06
  • Contact: LI Hai-jun E-mail:lihaijunchina@hotmail.com

摘要：

目的 探讨中国现代人群下颌第三磨牙（M3）的萌出特点。方法 将第三磨牙分为3种类型，正常、半退化、缺失，然后比较不同时代间（新石器时代55例，青铜铁器时代191例，近代112例）各个类型出现率的差异。结果 M3正常的出现率随时代而降低，缺失的出现率随时代而升高，半退化的出现率随时代而升高。结论 M3正常的出现率随时代而降低，可能与下颌骨尺寸随时代的持续减小有关。

Abstract:

Objective To understand the degeneration of the lower third molars(M3) of Chinese recent population. Methods This study was conducted on 358 human mandibles from China. M3 was divided into 3 types: normal, degeneration and absent. Comparisons were made among different time periods. Results The frequency of the degeneration of the lower third molars was the highest in modern people, and the lowest in Neolithic age.Conclusion The frequency of the degeneration of the lower third molars goes up as time period goes by, which may be caused partly by the obvious size decrease of mandibles.