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Technical note: early post-mortem changes of human bone in taphonomy with μCT.

Erwan Le Garff1, Vadim Mesli2, Yann Delannoy2

  • 1Univ. Lille, EA 7367 - UTML - Unité de Taphonomie Médico-Légale, Rue André Verhaeghe, 59000, Lille, France. erwanlegarff@gmail.com.

International Journal of Legal Medicine
|December 31, 2016
PubMed
Summary
This summary is machine-generated.

Post-mortem interval estimation in forensic medicine is crucial. This study analyzed human cranial bone changes over four weeks using micro-tomography, revealing significant alterations in bone structure due to diagenesis.

Keywords:
Forensic anthropologyForensic scienceMicroCTPost-mortem intervalTaphonomyTechnical note

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Area of Science:

  • Forensic Anthropology
  • Biomaterials Science
  • Radiology

Background:

  • Accurate post-mortem interval (PMI) estimation is vital in forensic investigations.
  • Bone diagenesis, the post-mortem alteration of bone, can impact PMI assessments.
  • Understanding trabecular bone changes is key to refining forensic techniques.

Purpose of the Study:

  • To investigate the microstructural evolution of human cranial vault bone over a 4-week conservation period.
  • To analyze changes in bone volume, surface, and trabecular parameters using micro-tomography (μCT).
  • To explore the potential influence of diagenesis on cranial bone microarchitecture.

Main Methods:

  • Human cranial bone samples were conserved in a controlled environment (20°C, 60% humidity).
  • Micro-tomography (μCT) scans at 10-μm resolution were performed weekly for four weeks.
  • Quantitative analysis included total volume, bone volume, bone surface, trabecular number, thickness, and separation.

Main Results:

  • Over 4 weeks, mean bone volume decreased by 1.9%, bone surface by 5.1%, and trabecular number by 12.35%.
  • Mean trabecular separation increased by 5.55%, and trabecular thickness increased by 12.7%.
  • Significant variations in bone microarchitecture were observed, potentially linked to diagenesis.

Conclusions:

  • Post-mortem conservation leads to measurable changes in cranial bone microarchitecture.
  • Observed alterations in trabecular bone structure are likely influenced by diagenesis.
  • Further statistical studies are required to validate these findings and elucidate the mechanisms of bone alteration.