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Related Experiment Videos

Keyhole defect production in tubular bone.

H E Berryman1, W M Gunther

  • 1Department of Pathology, Regional Forensic Center, University of Tennessee, Memphis 38104, USA.

Journal of Forensic Sciences
|April 27, 2000
PubMed
Summary

Keyhole fractures, typically seen in the skull, can also indicate bullet direction in long bones like the humerus. This case study shows similar fracture mechanics in tubular bone, aiding in trajectory analysis.

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Area of Science:

  • Forensic Pathology
  • Biomechanics of Trauma

Background:

  • Fracture analysis, particularly of the cranium, is crucial for determining bullet trajectory.
  • Keyhole defects, characterized by irregular openings, signify tangential bullet impacts.

Observation:

  • This case study examines a tangential (keyhole) fracture on the humerus.
  • The fracture mechanics observed in the humerus mirror those typically seen in cranial fractures.

Findings:

  • Keyhole defects in tubular bones, such as the humerus, can reliably indicate bullet direction.
  • The orientation of the bone at the time of impact can be inferred from these fractures.

Implications:

  • This research extends the understanding of projectile trauma analysis to long bones.
  • Forensic investigations can benefit from recognizing keyhole fractures in non-cranial bones for trajectory reconstruction.

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