International Journal of Legal Medicine

, Volume 132, Issue 5, pp 1427–1435 | Cite as

Third molar mineralization in relation to chronologic age estimation of the Han in central southern China

  • Ying Liu
  • Kun Geng
  • Yanhao Chu
  • Mindi Xu
  • Lagabaiyila ZhaEmail author
Original Article


The purpose of this study is to provide a forensic reference data about estimating chronologic age by evaluating the third molar mineralization of Han in central southern China. The mineralization degree of third molars was assessed by Demirjian’s classification with modification for 2519 digital orthopantomograms (1190 males, 1329 females; age 8−23 years). The mean ages of the initial mineralization and the crown completion of third molars were around 9.66 and 13.88 years old in males and 9.52 and 14.09 years old in females. The minimum ages of apical closure were around 16 years in both sexes. Twenty-eight at stage C and stage G and 38 and 48 at stage F occurred earlier in males than in females. There was no significant difference between maxillary and mandibular teeth in males and females except that stage C in males. Two formulas were devised to estimate age based on mineralization stages and sexes. In Hunan Province, the person will probably be over age 14, when a third molar reaches the stage G. The results of the study could provide reference for age estimation in forensic cases and clinical dentistry.


Demirjian’s classification Central Southern Chinese population Forensic age estimation Third molar mineralization Hunan Province Han ethnicity 



We thank the XiangYa stomatological Hospital Central South University for providing materials and the School of Basic Medical Science Central South University for professional suggestions regarding forensic medicine.

Compliance with ethical standards

Our hospital’s ethics committee approved the study.

Conflict of interest

The authors declare that they have no conflicts of interest.


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Ying Liu
    • 1
  • Kun Geng
    • 2
  • Yanhao Chu
    • 2
  • Mindi Xu
    • 2
  • Lagabaiyila Zha
    • 3
    Email author
  1. 1.Department of Oral and Maxillofacial Surgery, Xiangya Stomatological HospitalCentral South UniversityChangshaChina
  2. 2.Xiangya Stomatological CollageCentral South UniversityChangshaChina
  3. 3.Department of Forensic Science, School of Basic Medical SciencesCentral South UniversityChangshaChina

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