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Research Article

Age estimation using the Demirjian method in third molars on cone beam computed tomography images

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Received 06 Feb 2023, Accepted 06 May 2024, Published online: 15 May 2024
 

Abstract

The study aimed to estimate the chronologic age of individuals and whether they were aged under or over 18 years by using the Demirjian method on cone beam computed tomography (CBCT) images. The developmental stages of the third molars in the maxilla and mandible of 445 individuals aged between 9 and 26 years were evaluated as eight stages from A to H according to the Demirjian method. The association of these eight stages with chronologic age according to the age of 18 years, which is accepted as the threshold value, and the distribution of the stages was statistically analyzed. There was no significant difference in the mean age at which developmental stages (A–H) were seen between the sexes (p > .05). Stage A was observed up to the age of 15 years in females and 14 years in males, and stage H was observed at the age of 16 at the earliest in both sexes. Stages A and B were not seen in individuals aged 18 years and over. The age of individuals and whether they are below or above 18 years can be estimated by evaluating the development of third molars according to the Demirjian method.

RÉSUMÉ

Cette étude vise à estimer l’âge chronologique d’individus et à déterminer si ces derniers sont âgés de plus ou moins 18 ans en utilisant la méthode de Demirjian à partir d’images acquises par Cone Beam Computed Tomography (CBCT). Les stades de développement des troisièmes molaires supérieures et inférieures de 445 individus âgés de 9 à 26 ans ont été catégorisés en huit stades de A à H selon la méthode de Demirjian. L’association de ces stades avec l’âge chronologique et leur distribution autour de la valeur seuil des 18 ans ont été statistiquement analysées. Les résultats ne montrent aucune différence significative de l’âge moyen des stades de développement (AH) en fonction du sexe des sujets (p > .05). Le stade A a été observé jusqu’à l’âge de 15 ans chez les sujets féminins et jusqu’à 14 ans chez les sujets masculins, et le stade H a été observé dès l’âge de 16 ans pour les deux sexes. Les stades A et B n’ont pas été observés chez les individus de plus de 18 ans. L’âge des individus et la distribution autour de la valeur seuil des 18 ans peuvent être estimés en évaluant le développement des troisièmes molaires selon la méthode de Demirjian.

Acknowledgements

We want to thank Prof. H. Ankaralı to the statistical analysis.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

None.

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