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Accuracy of age estimation and assessment of the 18-year threshold based on second and third molar maturity in Koreans and Japanese

This study aimed to validate Lee’s age estimation method and assess the 18-year threshold in Korean and Japanese populations. We evaluated the maxillary and mandibular second (M2) and third molars (M3) in 2657 orthopantomograms of the Korean and Japanese populations aged 15–23 years (19.47±2.62 year...

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Autores principales: Oh, Sehyun, Kumagai, Akiko, Kim, Sin-Young, Lee, Sang-Seob
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9269881/
https://www.ncbi.nlm.nih.gov/pubmed/35802665
http://dx.doi.org/10.1371/journal.pone.0271247
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author Oh, Sehyun
Kumagai, Akiko
Kim, Sin-Young
Lee, Sang-Seob
author_facet Oh, Sehyun
Kumagai, Akiko
Kim, Sin-Young
Lee, Sang-Seob
author_sort Oh, Sehyun
collection PubMed
description This study aimed to validate Lee’s age estimation method and assess the 18-year threshold in Korean and Japanese populations. We evaluated the maxillary and mandibular second (M2) and third molars (M3) in 2657 orthopantomograms of the Korean and Japanese populations aged 15–23 years (19.47±2.62 years for Koreans, 19.31±2.60 years for Japanese), using Demirjian’s criteria. Dental age was estimated, and correlations between chronological and dental ages were analyzed. Classification performance was calculated based on the 18-year threshold. The relationship between developmental stage and chronologic age was analyzed using multiple linear regression. Our results revealed that Lee’s method was appropriate for estimation in the Korean population. When the Lee’s method was applied to the Japanese population, a lower value of correlation coefficients between estimated and chronological age, and lower specificity were observed. Population differences were observed predominantly in the stages of root development (stages F and G) of M2s and M3s in both jaws and more frequently in females than in males. In the multiple linear regression between developmental stage and chronological age, lower values of adjusted r(2) were observed in the Japanese population than in the Koreans. In conclusion, the Lee’s method derived from the Korean population data might be unsuitable for Japanese juveniles and adolescents. To support the findings of this study, future studies with samples from multiple institutions should be conducted. Future studies with larger sample sizes are also warranted to improve the accuracy of dental age estimation and confirm the developmental pattern of teeth in the Japanese population.
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spelling pubmed-92698812022-07-09 Accuracy of age estimation and assessment of the 18-year threshold based on second and third molar maturity in Koreans and Japanese Oh, Sehyun Kumagai, Akiko Kim, Sin-Young Lee, Sang-Seob PLoS One Research Article This study aimed to validate Lee’s age estimation method and assess the 18-year threshold in Korean and Japanese populations. We evaluated the maxillary and mandibular second (M2) and third molars (M3) in 2657 orthopantomograms of the Korean and Japanese populations aged 15–23 years (19.47±2.62 years for Koreans, 19.31±2.60 years for Japanese), using Demirjian’s criteria. Dental age was estimated, and correlations between chronological and dental ages were analyzed. Classification performance was calculated based on the 18-year threshold. The relationship between developmental stage and chronologic age was analyzed using multiple linear regression. Our results revealed that Lee’s method was appropriate for estimation in the Korean population. When the Lee’s method was applied to the Japanese population, a lower value of correlation coefficients between estimated and chronological age, and lower specificity were observed. Population differences were observed predominantly in the stages of root development (stages F and G) of M2s and M3s in both jaws and more frequently in females than in males. In the multiple linear regression between developmental stage and chronological age, lower values of adjusted r(2) were observed in the Japanese population than in the Koreans. In conclusion, the Lee’s method derived from the Korean population data might be unsuitable for Japanese juveniles and adolescents. To support the findings of this study, future studies with samples from multiple institutions should be conducted. Future studies with larger sample sizes are also warranted to improve the accuracy of dental age estimation and confirm the developmental pattern of teeth in the Japanese population. Public Library of Science 2022-07-08 /pmc/articles/PMC9269881/ /pubmed/35802665 http://dx.doi.org/10.1371/journal.pone.0271247 Text en © 2022 Oh et al https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Oh, Sehyun
Kumagai, Akiko
Kim, Sin-Young
Lee, Sang-Seob
Accuracy of age estimation and assessment of the 18-year threshold based on second and third molar maturity in Koreans and Japanese
title Accuracy of age estimation and assessment of the 18-year threshold based on second and third molar maturity in Koreans and Japanese
title_full Accuracy of age estimation and assessment of the 18-year threshold based on second and third molar maturity in Koreans and Japanese
title_fullStr Accuracy of age estimation and assessment of the 18-year threshold based on second and third molar maturity in Koreans and Japanese
title_full_unstemmed Accuracy of age estimation and assessment of the 18-year threshold based on second and third molar maturity in Koreans and Japanese
title_short Accuracy of age estimation and assessment of the 18-year threshold based on second and third molar maturity in Koreans and Japanese
title_sort accuracy of age estimation and assessment of the 18-year threshold based on second and third molar maturity in koreans and japanese
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9269881/
https://www.ncbi.nlm.nih.gov/pubmed/35802665
http://dx.doi.org/10.1371/journal.pone.0271247
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