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    Age estimation using the Demirjian method in third molars on cone beam computed tomography images
    (Routledge Journals, Taylor & Francis Ltd, 2024) Kunuk, Feyza Akalin; Bayrak, Seval
    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.
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    Dental age estimation with special emphasis on age limits of 12/15 and 18 years: Detailed analysis according to governing law
    (Marmara Univ, Inst Health Sciences, 2023) Sinanoglu, Alper; Kunuk, Feyza Akalin; Bayrak, Seval; Ankarali, Handan
    Objective: The aim of this study is to investigate the potential of Demirjian method in estimation of age groups with limits of 12, 15, and 18 years, according to ages of legal responsibilities. Methods: The panoramic radiographs of the study population aged between 6 to 22 were assessed for third molar (3M) mineralization with Demirjian method with four subgroups. Group 1 consisted of individuals aged between 6 to and 12 years of age, Group 2 were aged between 12 to 15 (Group 2, >= 12, <15), Group 3 were aged between 15-18 years (Group 3, >= 15, <18) and Group 4 were aged over-18s (Group 4, >= 18). Chronological age, developmental stages of 3Ms, differences between bilateral 3M stages and their relations between age groups were evaluated. Results: Regarding all 3M mineralization evaluations, stages 0 and A for Group 1; stages C and D for Group 2; stages E and F for Group 3; stage H for Group 4 was found to be high in percent (p<.05). Regarding the bilateral evaluations, the most variations were in readings of stages B, C, E and G as two stages below and one stage above the concordance. Conclusion: Use of Demirjian method facilitated discrimination of specific age groups with 12, 15, and 18 age thresholds in a sample of a young Turkish subpopulation from the Northwest Anatolia. Regarding the staging assessment in Demirjian method, independent evaluation of each side must be considered for bilateral 3Ms.