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The comparison between measurement of open apices of third molars and Demirjian stages to test chronological age of over 18 year olds in living subjects

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Abstract

This paper concerns a method for assessing adult age based on the relationship between age and the third molar maturity index (I3M), which is related to the measurement of the open apices of the third molar. Furthermore, this method was compared to those based on Demirjian’s stages G and H. The sample consisted of 906 Caucasian individuals aged between 14 and 23 years (53.6% females and 46.4% males). Orthopantomographs were analyzed by two observers and calibrated by means of the concordance correlation coefficient for the reproducibility of the third molar maturity index (I3M) and κ statistics for reproducibility of the Demirjian stages. Probabilities for an individual to be older than 18 years of age (adult age) were derived using the measurements of the third molar maturity index (I3M). These results were exploited to set out a threshold value to assign an individual to juvenile or adult age. A cutoff value of I3M = 0.08 was taken. The sensitivity of this test was 70% and specificity was 98%. Furthermore, the proportion of individuals with a correct classification was 83%. The results of the test showed a better specificity when compared to the choice of stage G and a better sensitivity when compared to the choice of stage H for adult age.

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Authors and Affiliations

  1. AgEstimation project, Institute of Forensic Medicine, University of Macerata, Via D. Minzoni, 62100, Macerata, Italy

    R. Cameriere, D. De Angelis, F. Scarpino & F. Galli

  2. Institute of Microbiology and Biomedical Sciences, Polytechnic University of Marche, Ancona, Via Ranieri 65, 60100, Ancona, Italy

    L. Ferrante

  3. Laboratorio di Antropologia e Odontologia forense (LABANOF), Institute of Legal Medicine, University of Milano, Via Mangiagalli 37, 20133, Milan, Italy

    D. De Angelis

Authors
  1. R. Cameriere
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  2. L. Ferrante
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  3. D. De Angelis
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  4. F. Scarpino
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  5. F. Galli
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Correspondence to R. Cameriere.

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Cameriere, R., Ferrante, L., De Angelis, D. et al. The comparison between measurement of open apices of third molars and Demirjian stages to test chronological age of over 18 year olds in living subjects. Int J Legal Med 122, 493–497 (2008). https://doi.org/10.1007/s00414-008-0279-6

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  • DOI: https://doi.org/10.1007/s00414-008-0279-6

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