Document Detail


Third-molar development in relation to chronologic age in young adults of central China.
MedLine Citation:
PMID:  18704319     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
The estimation of chronologic age based on the stages of third-molar development was evaluated by using the eight stages (A-H) method of Demirjian and the third-molar development was compared, in terms of sex and age, with results of previous studies. The samples consisted of 291 orthopantomograms from young Chinese subjects of known chronologic age and sex (including 139 males with a mean age of 14.67+/-3.62 y and 152 females with a mean age of 14.85+/-3.70 y). Statistical analysis was performed by employing the Mann-Whitney U-test and the t-test. Regression analysis was conducted to obtain regression formulas for calculating dental age from the chronologic age. Our results showed statistically significant differences (P<0.05) in third-molar development between males and females, at the calcification stages D, E and H. And a strong correlation was found between age and third-molar development in both males (r (2)=0.65) and females (r (2)=0.61). New equations (Age=8.76+1.32 Development stage) for estimating chronologic age were derived. It is concluded that third-molar genesis took place earlier in males than in females. The use of third molars as a developmental marker is appropriate in young adults of Central China. The formula obtained in the present study can be used as a guide for estimation of dental maturity and a standard for age estimation for young adults of Central China.
Authors:
Yuming Bai; Jing Mao; Shengrong Zhu; Wei Wei
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Publication Detail:
Type:  Journal Article     Date:  2008-08-15
Journal Detail:
Title:  Journal of Huazhong University of Science and Technology. Medical sciences = Hua zhong ke ji da xue xue bao. Yi xue Ying De wen ban = Huazhong keji daxue xuebao. Yixue Yingdewen ban     Volume:  28     ISSN:  1672-0733     ISO Abbreviation:  J. Huazhong Univ. Sci. Technol. Med. Sci.     Publication Date:  2008 Aug 
Date Detail:
Created Date:  2008-08-15     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101169627     Medline TA:  J Huazhong Univ Sci Technolog Med Sci     Country:  China    
Other Details:
Languages:  eng     Pagination:  487-90     Citation Subset:  IM    
Affiliation:
Department of Orthodontics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China. dr_baiyuming@163.com
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