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Imaging of the Microstructural Failure Mechanism in the Human Hip
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The impact velocity and bone fracture pattern: Forensic perspective.

Haim Cohen1, Chen Kugel2, Hila May3

  • 1Department of Anatomy and Anthropology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel; National Center of Forensic Medicine, Tel Aviv 61490, Israel.

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Summary

Investigating bone fracture patterns revealed that higher impact energy, specifically moderate and high velocities, resulted in more numerous, longer, and curvier fracture lines in pig femurs compared to low-energy impacts.

Keywords:
BoneForensicFractureImpactPatternVelocity

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Area of Science:

  • Biomechanics
  • Orthopedic Research
  • Forensic Science

Background:

  • Limited research exists on bone-energy interaction and fracture patterns.
  • Existing studies show a general correlation between fracture characteristics and the insult mechanism.

Purpose of the Study:

  • To develop a practical method for analyzing bone fractures.
  • To determine the relationship between impact force energy and resulting fracture patterns.

Main Methods:

  • Fresh pig femoral bones (n=30) were subjected to impact loading using a pendulum impact machine (Dynatup Model POE 2000).
  • Bones were positioned for three-point bending with compression.
  • Impacts were applied at three distinct velocities (low, moderate, high).

Main Results:

  • Moderate and high-energy impacts produced significantly more, longer, and curvier fracture lines than low-energy impacts.
  • Fracture lines predominantly appeared on the impacted side in moderate and high-velocity impacts.
  • A double butterfly fracture pattern with oblique-radial lines was observed in moderate and high-velocity impacts.

Conclusions:

  • A clear association exists between the velocity of impact and the resulting bone fracture pattern.
  • The study established a method for fracture analysis correlating impact energy with fracture characteristics.