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Scanning Skeletal Remains for Bone Mineral Density in Forensic Contexts
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Is bone analysis with μCT useful for short postmortem interval estimation?

Erwan Le Garff1,2, Vadim Mesli3,4, Elodie Marchand3,4

  • 1University Lille, EA 7367 - UTML - Unité de Taphonomie Médico-Légale, F-59000, Lille, France. erwanlegarff@gmail.com.

International Journal of Legal Medicine
|October 1, 2017
PubMed
Summary
This summary is machine-generated.

Micro-computed tomography (μCT) reveals early architectural changes in postmortem human bone, specifically within the first two weeks. These findings offer potential new methods for estimating the postmortem interval (PMI) in forensic investigations.

Keywords:
Forensic anthropologyForensic scienceMicro-CTPostmortem intervalTaphonomy

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Area of Science:

  • Forensic Anthropology
  • Biomaterials Science
  • Radiology

Background:

  • Accurate postmortem interval (PMI) estimation is crucial in forensic medicine for legal and investigative purposes.
  • Evaluating PMI from human skeletal remains presents significant challenges due to a lack of effective tools.
  • Understanding bone decomposition changes is vital for forensic science.

Purpose of the Study:

  • To characterize architectural modifications in human bone micro-architecture during the postmortem period using micro-tomography (μCT).
  • To identify early changes in bone structure that could aid in PMI estimation.
  • To explore the potential of μCT as a tool for osseous taphonomy.

Main Methods:

  • Ten human cranial bone samples were analyzed using μCT (10 μm resolution) over 10 weeks.
  • Bone samples were conserved in a controlled laboratory environment (20°C, 60% humidity) without freezing or embalming.
  • 3D analysis focused on trabecular parameters including bone surface to bone volume ratio (BS/BV) and trabecular separation (TbSp), analyzed over time using linear mixed models.

Main Results:

  • Significant changes in bone architecture were observed within the first two weeks postmortem.
  • A statistically significant decrease in the bone surface to bone volume ratio (BS/BV) was noted (p=0.046), particularly pronounced in the first two weeks (p=0.003).
  • A significant increase in trabecular separation (TbSp) was observed during the initial two weeks (p<0.0001).

Conclusions:

  • Micro-tomography (μCT) can detect early architectural modifications in postmortem human bone.
  • These structural changes occur within the first two weeks after death, suggesting potential for early PMI estimation.
  • Further research is needed to build comprehensive databases of osseous taphonomy for improved forensic applications.