International Journal of Legal Medicine

, Volume 128, Issue 1, pp 177–182 | Cite as

Fetal age estimation using MSCT scans of deciduous tooth germs

  • Marie Minier
  • Delphine Maret
  • Fabrice Dedouit
  • Marion Vergnault
  • Fathima-Zohra Mokrane
  • Hervé Rousseau
  • Pascal Adalian
  • Norbert Telmon
  • Daniel Rougé
Original Article

Abstract

Evaluation of fetal age is an essential element in many fields such as anthropology, odontology, paleopathology, and forensic sciences. This study examines the correlation between fetal age, femoral diaphyseal length (considered as the gold standard), and deciduous tooth germs of fetuses aged 22 to 40 weeks amenorrhea (WA) based on computed tomography (MSCT) reconstructions. Qualitative and quantitative studies of femoral and deciduous tooth germ lengths were performed on 81 fetuses (39 females and 42 males). R software was used for statistical analyses. Intra-observer and inter-observer variabilities and the interclass correlation coefficient (ICC) were calculated. Correlation coefficients (R2) and linear regression equations were calculated. Intra- and inter-observer variabilities were very satisfactory (intra-observer ICC ≥ 0.96, inter-observer ICC ≥ 0.95). Femoral length was significantly correlated with age (R2 = 0.9). The correlation coefficient between age and height, width, and dental volume was R2 ≥ 0.73. Tooth germs were good indicators of fetal age. Our method appears to be reliable and reproducible, and the results of this study agreed with those of the literature. The dental formula provided a precise estimation of fetal age between 25 and 32 WA. Tooth germs were reliable indicators of fetal age, and multislice computed tomography was shown to be an innovative and reliable technology for this purpose.

Keywords

Fetal age Age estimation Anthropology Deciduous teeth Femur MSCT 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Marie Minier
    • 1
    • 3
  • Delphine Maret
    • 1
    • 2
  • Fabrice Dedouit
    • 1
    • 3
    • 4
  • Marion Vergnault
    • 1
    • 3
  • Fathima-Zohra Mokrane
    • 1
    • 4
  • Hervé Rousseau
    • 4
  • Pascal Adalian
    • 5
  • Norbert Telmon
    • 1
    • 3
  • Daniel Rougé
    • 1
    • 3
  1. 1.Laboratoire d’Anthropologie Moléculaire et Imagerie de Synthèse, AMIS, UMR 5288 CNRS, Faculté de MédecineUniversité de Toulouse IIIToulouseFrance
  2. 2.Faculté de Chirurgie DentaireCHU ToulouseToulouseFrance
  3. 3.Service de Médecine LégaleCentre Hospitalier Universitaire RangueilToulouse Cedex 9France
  4. 4.Service de RadiologieCentre Hospitalier Universitaire RangueilToulouse Cedex 9France
  5. 5.Anthropologie Bioculturelle, Université de la Méditerranée, UMR 6578 CNRS-EFS, Faculté de Médecine NordMarseilleFrance

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