Effects of extreme heat on teeth with implications for histologic processing

Area of Science:

• Forensic dentistry
• Dental histology
• Materials science

Background:

• Forensic investigations involving incineration require reliable methods for identifying human remains.
• Understanding the effects of extreme heat on dental tissues is crucial for post-mortem analysis.

Purpose of the Study:

• To investigate the effects of extreme heat on human teeth under controlled laboratory conditions.
• To evaluate the impact of thermal insult, decalcification, and histologic processing on dental tissues.
• To identify reliable microscopic indicators of incinerated dental tissues.

Main Methods:

• Teeth were subjected to controlled high temperatures (above 600°C) in a laboratory setting.
• Following thermal exposure, teeth underwent decalcification and standard histologic processing.
• Physical and microscopic changes were documented and correlated with temperature and duration of heat exposure.

Main Results:

• Microscopic examination revealed severe tissue fragmentation, vapor bubbles in dentinal tubules, altered staining, charring, and shrinkage.
• Dentin demonstrated the highest reliability as a microscopic identifier of incinerated dental tissues.
• Temperatures exceeding 600°C strongly predicted tooth disintegration post-decalcification.

Conclusions:

• High temperatures significantly alter dental tissues, impacting their integrity after decalcification.
• Dentin serves as a key microscopic marker for identifying incinerated teeth in forensic contexts.
• Maintaining the integrity of histologic evidence from incinerated teeth presents challenges, particularly at temperatures above 600°C.