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Dental age assessment: scoring systems and models from the past until the present—how is it presented in the court?

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Abstract

Objective

The aim of this study is to evaluate the accuracy of the methods from the past and present, such as Demirjian, Cameriere, and AlQahtani, as well as to determine the most reliable method for human age estimation under the request from the courts according to the effect size from each method in age estimation.

Design

Four hundred eighty-three orthopantomographic images were selected from 318 patients from Centro Hospitalar Universitário Lisboa Norte aged between 6 and 15 years old. Several measurements of widths and lengths and classification of tooth development stages were performed, according to each age estimation method. The listing of patients and orthopantomographic images were consulted through SECTRA®. All data was entered and analysed using SPSS version 28. Observations’ validity was verified through inter- and intraobserver validation.

Results

The correlation coefficients between age and age estimates by the three methods on both sides were close to 90%. Regarding the estimation error correlation coefficient, Demirjian and AlQahtani values were low, whereas Cameriere’s was significantly negative; i.e., underestimation increases as age increases. Between left and right, any significant difference in age estimation in AlQahtani and Cameriere methods was not observed, but there were great variability and large effect for the Demirjian method. Comparing females and males, the statistical analysis showed no significant differences and quite small effects in the precision of the estimates for any of the methods. Finally, although significant differences were detected when comparing estimated values and age, small effects were revealed except for the Demirjian method which attained a medium effect and, therefore, less consistency of estimation.

Conclusions

Since it was not possible to determine the most reliable method for age estimation, a combined application of different age estimation methodologies is recommended to be use in the courts with relevant statistical data such as effect size.

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Acknowledgements

The authors would like to thank the Director of the Stomatology Department of Hospital Universitário de Santa Maria, Diana Augusto, Adriana Resende, and Ana Rodrigues (researchers of the group) and Francisco Salvado, for all the help when concretizing this study.

Funding

This work was supported by Centro de Estatística e Aplicações da Universidade de Lisboa, CEAUL, FCT—Fundação para a Ciência e a Tecnologia, Grant Project reference UIDB/00006/2020.

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Correspondence to Cristiana Palmela Pereira.

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Ethical approval for the study was obtained from the Ethics Committee of the Faculty of Dental Medicine and of the Faculty of Medicine, University of Lisbon.

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The authors declare no conflict of interest.

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Pereira, C.P., Santos, R., Nushi, V. et al. Dental age assessment: scoring systems and models from the past until the present—how is it presented in the court?. Int J Legal Med 137, 1497–1504 (2023). https://doi.org/10.1007/s00414-023-03011-3

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