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Related Experiment Video

Updated: Apr 1, 2026

Scanning Skeletal Remains for Bone Mineral Density in Forensic Contexts
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Utilization of bone impedance for age estimation in postmortem cases.

Noboru Ishikawa1, Hideki Suganami2, Atsushi Nishida3

  • 1Department of Forensic Medicine, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, 602-8566, Japan; Department of Forensic Odontology and Anthropology, Tokyo Dental College, 101-0061, Japan.

Journal of Forensic and Legal Medicine
|October 1, 2015
PubMed
Summary

Forensic age estimation can be improved by measuring bone impedance of the sagittal suture. This novel technique shows potential for more reliable age assessment in unidentified individuals, aiding forensic investigations.

Keywords:
Age estimationBone impedance valueForensic anthropologyForensic odontologySagittal sutureUnidentified cadavers

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Area of Science:

  • Forensic Medicine
  • Biophysics

Background:

  • Increasing numbers of unidentified cadavers necessitate improved identification methods.
  • Current age estimation techniques, like sagittal suture closure, lack consistent reliability.
  • Objective, quantitative methods are needed for forensic age assessment.

Purpose of the Study:

  • To investigate the relationship between bone impedance values of the sagittal suture and age in both males and females.
  • To evaluate the potential of bone impedance measurement as a novel method for forensic age estimation.
  • To compare the accuracy of bone impedance measurements with conventional visual age estimation methods.

Main Methods:

  • Measurement of impedance values (z-values) across the sagittal suture of human skulls.
  • Analysis of impedance data in relation to chronological age for both sexes.
  • Comparison of age estimations derived from bone impedance versus visual assessment.

Main Results:

  • Bone impedance values demonstrated a positive correlation with aging.
  • A decrease in bone impedance was observed after the age of 64.5 years.
  • The study explored the potential for bone impedance to serve as a quantitative age indicator.

Conclusions:

  • Bone impedance measurement of the sagittal suture shows promise as a reliable method for age estimation in forensic science.
  • This technique offers a potentially more objective and accurate alternative to traditional visual methods.
  • Further research could validate bone impedance as a valuable tool for identifying unidentified remains.