作者: Ge Fei Shi Guangyou Zhu
DOI: 10.4172/2157-7145.1000266
关键词:
摘要: It is an important and difficult job to determine chronological age. The latest Meta-Analysis find that Demirjian’s classification method could be used estimate 3.5~16.9 years old people by permanent teeth except third molar [1]. well known erupt after 18-year-old grow completely 22-year-old. So, they are over 16-year-old teenagers, though the development of different from people. However, it effective Olze et al. [2] found there difference among races assessing age with method. And no study data in field China. Based on reliability operability method, our research out degree mineralization young