FMAR  Vol.1 No.3 , July 2013
Estimating age of Brazilians using the methods of Demirjian and Nicodemo, Moraes and Médici: A comparative analysis
ABSTRACT
This study proposed to evaluate the precision of Nicodemo, Moraes and Médici method and the method proposed by Demirjian and compare both methodologies in relation to the efficiency and applicability in the Brazilian population. The sample consisted of 124 panoramic radiographs of subjects in the age group from 7 to 16 years old, 66 patients female and 58 male. For the comparison of the genders in relation to the average percentage difference, the t-Student test was considered. In average the method of Nicodemo, Moraes and Médici presented for the female gender an estimated result 14.7% lower than the real age. For the male gender the estimative obtained was that for each year of variation of the real age the method of Nicodemo estimates a variation of 0.48 years, with a confidence interval of 95% given by (0.43; 0.54). For the method of Demirjian the result was that for each year of variation of the real age the method of Demirjian estimates a variation of 1.00 year, with a confidence interval of 95% given by (0.85; 1.15) for the male gender and 0.96 years, with a confidence interval of 95% given by (0.84; 1.08) for the female gender. It is concluded that the Method of Nicodemo, Moraes and Médici tends to underestimate the real age and that as the real age increases this underestimate becomes higher. Now, the method of Demirjian tends to over- estimate the real age in 8.2 months for the male gender and in 7.1 for the female one in average.


Cite this paper
Duarte da Silva, R. , André Duarte da Silva, M. , Yumi Uezono, A. , Borges Braga dos Santos Queiroz, S. and Nogueira de Oliveira, R. (2013) Estimating age of Brazilians using the methods of Demirjian and Nicodemo, Moraes and Médici: A comparative analysis. Forensic Medicine and Anatomy Research, 1, 57-62. doi: 10.4236/fmar.2013.13011.
References
[1]   Willem, G. (2001) A review of the most commonly used dental age estimation techniques. The Journal of Forensic Odonto-Stomatology, 19, 9-17.

[2]   Schmeling, A., Reisinger, W., Geserick, G. and Olze, A. (2006) Age estimation of unaccompanied minors Part I. General considerations. Forensic Science International, 159, S61-S64. doi:10.1016/j.forsciint.2006.02.017

[3]   Daruje, R.J. (2000) Computerized facial reconstruction and their importance in identification. Ph.D. Thesis, State University of Campinas/FOP, Piracicaba.

[4]   Santoro, V., De Donno, A., Marrone, M., Campobasso, C.P. and Introna, F. (2009) Forensic age estimation of living individuals: A retrospective analysis. Forensic Science International, 193, 129.e1-129.e4.

[5]   Glaser, I. and Hunt Jr., E.E. (1955) The Permanent mandibular first molar its calcification eruption and decay. American Journal of Physical Anthropology, 13, 253-281. doi:10.1002/ajpa.1330130206

[6]   Nolla, C.M. (1960) The development of permanent teeth. Journal of Dentistry for Children, 27, 254-266.

[7]   Marcondes, E., Rummel, A. and Schuartsman, S. (1965) Determination of bone age and dental, by radiographic examination in children from low socio-economic status. Journal of the Faculty of Dentistry, University of S?o Paulo, 3, 185-191.

[8]   Krogman, W.M. (1968) Biological timing and dentofacial complex. Journal of Dentistry for Children, 35, 175-184.

[9]   Hagg, U. and Matsson, L. (1985) Dental maturity as an indicator of chronological age: The accuracy and precision of three methods. European Journal of Orthodontics, 7, 25-34. doi:10.1093/ejo/7.1.25

[10]   Cardozo, H.F. and Silva, M. (1997) Age estimation by examining the teeth. In: Silva, M., Ed., Compendium of Legal Dentistry, Medsi, S?o Paulo, 125-148.

[11]   Nicodemo, R.A., Moraes, L.C. and Médici, E. (1974) Chronological table of mineralization of permanent teeth among Brazilians. Journal of the Faculty of Dentistry, 3, 55-56.

[12]   Demirjian, A., Goldstein, A.H. and Tanner, J.M. (1973) A new systems of dental age assessment. Human Biology, 45, 211-227.

[13]   Nicodemo, R.A. (1967) Contribution to the study of the chronology of mineralization of third molars, radio-graphic method in Caucasian Brazilians residing in the Paraíba Valley. Ph.D. Thesis, University of S?o Paulo, S?o José dos Campos.

[14]   Moraes, L.C. (1973) Chronology of mineralization of incisors and first permanent molars, radiographic method. Ph.D. Thesis, University of S?o Paulo, S?o José dos Campos.

[15]   Médici Filho, E. (1973) Chronology of mineralization of canines, premolars and second molars among Brazilian whites, radiographic method. Ph.D. Thesis, University of S?o Paulo, S?o José dos Campos.

[16]   Demirjian, A. and Goldstein, H. (1976) New systems for dental maturity based on seen and four teeth. Annals of Human Biology, 3, 411-421. doi:10.1080/03014467600001671

[17]   Blenkin, M. (2009) Forensic odontology and age estimation. VDM Verlag Dr. Muller aktiengesellshHaft & CO. KG, Saarbrücken.

[18]   Bagherpour, A., Imanimoghaddam, M., Bagherpour, M.R. and Einolghozati, M. (2010) Dental age assessment among Iranian children aged 6-13 years using the Demirjian method. Forensic Science International, 197, 121e1- 121e4.

[19]   Willems, G., Van Olmen Spiessens, A.B. and Carels, C. (2001) Dental age estimation in Belgian children: Demirjian’s technique revisited. Journal of Forensic Sciences, 46, 893-895.

[20]   Blenkin, M.R.B. and Evans, W. (2010) Age estimation from the teeth using a modified Demirjian system. Journal of Forensic Sciences, 55, 1504-1508. doi:10.1111/j.1556-4029.2010.01491.x

[21]   Davis, P.G. and H?gg, U. (1994) The accuracy and precision of the Demirjian system when used for age determination in Chinese children. Swedish Dental Journal, 18, 113-116.

[22]   Staff, V., Mornstad, H. and Welander, U. (1991) Age estimation based on tooth development; a test of reliability and vahdity. Scandinavian Journal of Dental Research, 99, 281-286.

 
 
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