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Accuracy of age estimation from orthopantomograph using Demirjian's method
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Abstract: (17723 Views) |
| Background & Aim: Age determination of living children with unknown identity, suspected of crime or violence as well as identification procedure of unknown skulls has a great value. Owing to a comparatively low variability of tooth calcification in relation to chronological age, it seems that methods based on stages of tooth formation are more suitable in estimation of chronological age than those based on other indicators of somatic growth. One widely used method for the comparison between different populations is that first described by Demirjian. The study was designed to determine dental age from orthopantomograph using Demirjian method and to investigate applicability of Demirjian method for estimation of chronological age in children of Isfahan.
Materials & Methods: After obtaining approval from ethical committee of university, a sample selected in a department of pedodontic consisted of 104 orthopantomograph of 41 boys and 62 girls of 6–14 years of age. Seven mandibular teeth in orthopantomograph were examined. Tooth formation is divided into eight stages and criteria for the stages from A to H are given for each tooth. Each stage is given score according to a model. Standards are given for each sex separately. The sum of the score for the seven teeth is transferred to a dental age. Chronological age was calculated by subtracting the birth date from the date on which the radiographs were exposed for individual.
Findings: Dental and chronological age was showed high correlation (r =0.924 for girls and r = 0.932 for boys). When Demirjian method was applied to Isfahanian children, mean difference between true and assessed age for males showed overestimation of 0.02 years (7 days) and females showed overestimation of 0.14 years (51 days).
Conclusions: Demirjian method showed high accuracy when applied to children of this study. By using of this method we can estimate age especially in forensic medicine. |
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| Keywords: Dental Age, Chronological Age, Demirjian Method |
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Full-Text [PDF 1816 kb]
(1990 Downloads)
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Type of Article: Research Article |
Subject:
Forensic Medicine
Received: 2009/03/18 | Revised: 2009/11/4 | Accepted: 2018/03/29 | ePublished: 2018/03/29
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