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Dental Age Assessment using Demirjian's Eight Teeth Method and Willems Method in a Tertiary Hospital
Nitin Kumar Agrawal1, Lucina Hackman2, Samarika Dahal1
1Department of Dentistry, Institute of Medicine, Maharajgunj, Kathmandu, Nepal.
Introduction:
Age estimation is an important aspect in forensic anthropology, as it can aid in the identification of the deceased, and can be used in cases of immigration, child abuse and criminal prosecution in living individuals. Dental age estimation is considered reliable and accurate, since tooth development is least affected by environmental factors compared to somatic growth.
Methods:
In total, 150 pre-orthodontic treatment radiographs from healthy individuals were assessed. These individuals were aged between 8 to 19 years. Dental age for these individuals was calculated by two methods: Demirjian's eight teeth method and Willems method. For Willems method, seven teeth on the left side of mandible (except the third molar) were staged according to Demirjian's staging, and for Demirjian's eight teeth method, all eight teeth were staged.
Results:
The mean chronological ages were 13.6961±1.94384 years in males and 13.9204±2.63541 years in females. The mean estimated ages by Demirjian's eight teeth method were 12.1856±1.73478 years and 11.7906±2.32344 years in males and females respectively. Similarly, the mean estimated ages by Willems method were 12.8958±1.46838 years in males and 12.6926±2.27807 years in females.
Conclusions:
Willems method and Demirjian's eight teeth method underestimated the chronological age in the given population. Both methods showed excellent correlation with chronological age indicating their applicability in dental age estimation, with development of population specific scores.