Estimate the Age of Han Adult Based on the Pulp Chamber Volume and Pulp Dentinal Index of Right First Molars Using Oral and Maxillofacial CBCT
10.12116/j.issn.1004-5619.2023.230705
- VernacularTitle:基于汉族成年人右侧第一磨牙口腔颌面CBCT髓室体积和牙本质指数推断年龄
- Author:
Yan-Jie DING
1
;
Xiao ZHANG
;
Wen-Li SHI
;
Zi-Yi LI
;
Wei WANG
;
Shi-Lin ZHANG
;
Gen-Jie YANG
;
A-Ji GUO
;
Bo JIN
Author Information
1. 川北医学院基础医学与法医学研究所,四川 南充 637000
- Keywords:
forensic anthropology;
age estimation;
cone beam computed tomography(CBCT);
first mo-lar;
pulp chamber volume;
pulp dentinal index
- From:
Journal of Forensic Medicine
2025;41(1):59-65
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the correlation between the actual age and the pulp chamber volume(PCV)and pulp dentinal index(PDI)of the right first molars based on cone beam computed tomog-raphy(CBCT)technology,and to construct an accurate and convenient model for age estimation.Methods CBCT image data of 1 857 Han adults(883 males and 974 females)from the Department of Stomatology,Affiliated Hospital of North Sichuan Medical College were collected.The data were di-vided into training and validation sets at a ratio of 8∶2.A total of 1 485 training samples were used to construct the age estimation model,and 372 samples were used to validate the accuracy of the model.The Mimics 21.0 software was used to measure the PCV and calculate the PDI of the right first molars.Their correlations with age and the differences between different sexes and tooth positions were analyzed.Results Both the PCV and the PDI of the first molars showed strong negative correla-tions with the actual age(r values ranged from 0.82 to 0.89).The differences in PCV and PDI be-tween different sexes and tooth positions were statistically significant(P<0.05).The age estimation model based on PDI was superior to that based on PCV.The model based on the PDI values of the two right first molars(y=73.72-44.15 x3-28.27 x4,where x3 and x4 are the PDI values of the right maxil-lary and mandibular first molars,respectively)was the best,with the R2 of 0.79 and the mean abso-lute error of 4.90 years.Conclusion Both PCV and PDI of the first molars are effective indicators for age estimation.The age estimation model based on the PDI is more convenient and accurate than that based on the PCV,providing a more effective method for age estimation in forensic practice.
