Postmortem Change and its Effect on Evaluation of Fractures

Area of Science:

• Forensic Anthropology
• Skeletal Biology
• Taphonomy

Background:

• Postmortem alterations can obscure or simulate injuries, challenging the interpretation of skeletal trauma.
• Bones, despite their resilience, undergo changes after death that affect fracture analysis.
• The presence or absence of organic material distinguishes wet bone from dry bone, influencing fracture appearance.

Purpose of the Study:

• To explore the challenges in determining the timing of bone fractures in relation to death.
• To differentiate between antemortem, perimortem, and postmortem fractures based on skeletal evidence.
• To advocate for a descriptive approach over potentially ambiguous terminology like "perimortem".

Main Methods:

• Analysis of bone microstructure and biomechanical properties.
• Comparative examination of fracture characteristics in wet versus dry bone.
• Review of established terminology and proposed descriptive alternatives for fracture timing.

Main Results:

• Loss of organic material alters bone's biomechanical response to trauma.
• Fractures in wet bone differ from those in dry bone, observable through coloration, fracture features, and cortical changes.
• Distinguishing fracture timing based solely on morphology can be problematic due to non-absolute changes.

Conclusions:

• The distinction between wet and dry bone fractures is crucial for interpreting skeletal trauma.
• Ambiguity in terms like "perimortem" necessitates a shift towards precise descriptive methods.
• Accurate interpretation of skeletal remains requires understanding postmortem bone alterations and fracture mechanics.