Demirjian′s method in the estimation of age: A study on human third molars

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Published Aug 1, 2015
https://doi.org/10.4103/0975-1475.155081
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Volume 7, Issue 2, May-August 2015

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Amitha Lewis
Department of Oral Pathology and Microbiology, Manipal College of Dental Sciences, Mangalore, Manipal University, Manipal, Karnataka
Karen Boaz
Department of Oral Pathology and Microbiology, Manipal College of Dental Sciences, Mangalore, Manipal University, Manipal, Karnataka
K Nagesh
Department of Forensic Medicine, Father Muller Medical College Hospital, Mangalore, Karnataka
N Srikant
Department of Oral Pathology and Microbiology, Manipal College of Dental Sciences, Mangalore, Manipal University, Manipal, Karnataka
Neha Gupta
Department of Periodontics, Shri Bankey Bihari Dental College and Research Center, Masuri, Ghaziabad, Uttar Pradesh
K Nandita
Department of Oral Pathology and Microbiology, Manipal College of Dental Sciences, Mangalore, Manipal University, Manipal, Karnataka
Nidhi Manaktala
Department of Oral Pathology and Microbiology, Manipal College of Dental Sciences, Mangalore, Manipal University, Manipal, Karnataka

Abstract

Aim: The primary aim of the following study is to estimate the chronological age based on the stages of third molar development following the eight stages (A to H) method of Demirjian et al. (along with two modifications-Orhan) and secondary aim is to compare third molar development with sex and age. Materials and Methods: The sample consisted of 115 orthopantomograms from South Indian subjects with known chronological age and gender. Multiple regression analysis was performed with chronological age as the dependable variable and third molar root development as independent variable. All the statistical analysis was performed using the SPSS 11.0 package (IBM ® Corporation). Results: Statistically no significant differences were found in third molar development between males and females. Depending on the available number of wisdom teeth in an individual, R2 varied for males from 0.21 to 0.48 and for females from 0.16 to 0.38. New equations were derived for estimating the chronological age. Conclusion: The chronological age of a South Indian individual between 14 and 22 years may be estimated based on the regression formulae. However, additional studies with a larger study population must be conducted to meet the need for population-based information on third molar development.

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How to Cite
Amitha Lewis, Karen Boaz, K Nagesh, N Srikant, Neha Gupta, K Nandita, & Nidhi Manaktala. (2015). Demirjian′s method in the estimation of age: A study on human third molars. Journal of Forensic Dental Sciences, 7(2), 153–157. https://doi.org/10.4103/0975-1475.155081
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