ISSN: 0022-1198
CODEN: JFSCA
Published Online: 1 November 2004
Page Count: 8

Dental Maturity Curves in Finnish Children: Demirjian's Method Revisited and Polynomial Functions for Age Estimation
Demirjian, A
Université de Montréal, Québec

Kataja, M
National Public Health Institute,

Nyström, M
Institute of Dentistry,

Chaillet, N
Université de Montréal, Quebec

(Received 18 May 2004; accepted 26 June 2004)

Abstract

Dental maturity was studied from 2213 dental panoramic radiographs of healthy ethnic Finns from southern Finland, aged between 2 and 19 years. The aim was to provide new Finnish maturity tables and curves and to compare the efficiency of Demirjian's method when differently weighted scores and polynomial regressions are used. The inter-ethnic variations lead us to calculate specific Finnish weighted scores. Demirjian's method gives maturity score as a function of age and seems better adapted for clinicians because, in their case, the maturity score is unknown. Polynomial functions give age as a function of maturity score and are statically adapted for age estimation studies. Finnish dental maturity tables and development curves are given for Demirjian's method and for polynomial functions. Sexual dimorphism is established for the same weighted score for girls and boys, and girls present a greater maturity than boys for all of age groups. Polynomial functions are highly reliable (0.19% of misclassifies) and the percentile method, using Finnish weighted scores, is very accurate (±1.95 years on average, between 2 and 18 years of age). This suggests that polynomial functions are most useful in forensic sciences, while Demirjian's method is most useful for dental health clinicians.

Keywords:
forensic science, age estimation, Demirjian's method, dental maturity, polynomial functions

Paper ID: JFS2004211
DOI: 10.1520/JFS2004211
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