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Imaging of the Microstructural Failure Mechanism in the Human Hip

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Osteonal Damage Patterns from Ballistic and Blunt Force Trauma in Human Long Bones.

Keira Sexton^1,2, Nathalie Schwab^2,3, Ignasi Galtés^2,4,5

¹Institute for Interdisciplinary Studies, Faculty of Science, University of Amsterdam, 1098 XH Amsterdam, The Netherlands.

Life (Basel, Switzerland)

|February 24, 2024

Summary

Forensic analysis of bone fractures can be enhanced by examining microscopic osteonal damage (OD). Distinct OD patterns differentiate blunt force trauma (BFT) from gunshot trauma (GST), aiding skeletal trauma identification.

Keywords:

blunt force trauma bone histology forensic anthropology gunshot trauma hard tissue biomechanics long bone fracture microcrack trauma mechanisms

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Published on: April 11, 2012

Area of Science:

Forensic Anthropology
Skeletal Trauma Analysis
Bone Histology

Background:

Macroscopic analysis of skeletal trauma is challenging for comminuted or incomplete fractures.
Histological analysis offers potential for detailed trauma type and biomechanics insights.
Osteonal damage (OD) characteristics may differentiate trauma mechanisms.

Purpose of the Study:

To investigate distinct osteonal damage (OD) patterns in long bones subjected to blunt force trauma (BFT) and gunshot trauma (GST).
To compare OD in traumatic death cases with post-mortem experimental fractures.
To assess the value of histological OD analysis in forensic anthropology.

Main Methods:

Analysis of osteonal microcrack damage in human long bones from BFT and GST cases.
Categorization of four distinct osteonal damage (OD) types.
Comparison of OD patterns between traumatic deaths and experimental post-mortem fractures.

Main Results:

Type 1 OD (inside osteon, compromising Haversian canal) indicated BFT in death cases.
Type 3 (cement line) and Type 4 (interstitial lamellae) OD were more prevalent in GST cases.
Experimentally induced GST showed similar OD patterns to GST death cases, with dry bone fractures exhibiting high OD.

Conclusions:

Distinct osteonal damage patterns exist for blunt force trauma (BFT) and gunshot trauma (GST) in human long bones.
Histological analysis of osteonal damage provides valuable supplementary data for forensic trauma identification.
Experimental models can replicate post-mortem trauma patterns relevant to forensic casework.