Age estimation in Sichuan Han female adults based on tooth volume analysis using cone-beam computed tomography

doi:10.12337/zgkqzzxzz.2019.03.002

Abstract

Abstract: Objective： Cone-beam computed tomography was used to analyze the tooth volume of different adults in order to estimate the age of females of Han nationality in Sichuan, and to explore the application value of tooth volume change in age estimation. Methods： CBCT images of 149 Han females aged 20 to 60 in Sichuan were collected. The pulp cavity volume (X1) and dentin volume(X2) of left maxillary central incisors were measured by Mimics 17.0 software, and the total tooth volume(X3) was calculated as the mea- surement index. Pearson correlation analysis was used to analyze the correlation between each measure- ment index and chronological age. Sixteen samples were randomly selected from the total sample as vali- dation samples, and the remaining 133 samples were used to develop regression equation for female adult age estimation. Results： Pearson correlation analysis showed that only pulp cavity volume(X1) was nega- tively correlated with chronological age(r=-0.666, P<0.001). Dentin volume(X2) and total tooth volume (X3) were not significantly correlated with chronological age(P>0.05). The results of model validation showed that the mean absolute error(MAE) of regression model based on pulp cavity volume(X1) was 7.723 year. Conclusion： CBCT can be used to observe the pulp cavity volume changes of left maxillary central incisors, which can be used to estimate the age of females adult of Han nationality in Sichuan, and provide a new method for the age estimation of adults in forensic practice in China.

Key words: forensic dentistry, forensic imaging, age estimation, left maxillary central incisors, CBCT

CLC Number:

R782

WANG Liang, ZHAN Mengjun, ZHAO Jialong, et al. Age estimation in Sichuan Han female adults based on tooth volume analysis using cone-beam computed tomography[J]. Chinese Journal of Oral Implantology, 2019, 24(1): 5-9.

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