Dental identification (forensic odontology)
- Method
Teeth withstand fire and decay; comparing their dental work and features with dental records allows identification.
What it is
Forensic odontology identifies a person by comparing their teeth with dental records made in life. Teeth are the hardest tissue in the body, are protected inside the mouth and resist fire, water and decomposition. Fillings, crowns, root canals, implants and dentures are made to measure for each person, and even without dental work the shape and position of the teeth provide data. When there are no records, teeth allow age to be estimated (above all in children and young people) and guide the search. INTERPOL regards it as a primary identification method.
Accuracy and limits
- A single unexplained discrepancy (for example, a tooth present that had been extracted in life) excludes identity.
- Explainable differences (new dental work done after the last record) do not exclude.
- Accuracy depends on the quality of the antemortem records; without them only a profile is possible.
- Dental age estimation is more precise in children than in adults, and is always given as a range.
What it is based on
- Teeth and jaws have individual features: shape, position, missing teeth, rotations.
- Dental work is unique and persists after death.
- Teeth form and erupt in predictable stages from fetal life to young adulthood.
- Some features and treatments suggest habits or region of origin.
How it is applied
- Examine and photograph the mouth; record every tooth on a postmortem dental chart.
- Take dental X-rays with views comparable to those of a dental practice.
- Obtain the antemortem records from the treating dentist: notes, chart, X-rays.
- Compare feature by feature, looking for matches and unexplained discrepancies.
- Give a graded conclusion and explain its basis in the report.
Next step: what to do and document
- Do not remove dentures or handle the mouth without documenting it: dentures also identify.
- At autopsy, describe missing teeth, dental work and prostheses, even if you are not a dentist.
- Ask the family for the treating dentist's name to obtain antemortem records.
- If age must be estimated, request forensic odontology support and X-rays.
- If you treat dental patients, keep complete charts and X-rays: they serve identification.
Common mistakes
- Confusing tooth numbering between different systems.
- Concluding identity from poor antemortem records without stating the degree of certainty.
- Giving an exact age instead of a range.
- Treating bite marks as if they had the reliability of dental comparison.
Test yourself
Think of the answer, then tap the question to see it.
Why are teeth useful for identifying burnt or decomposed bodies?
They are the hardest tissue in the body, protected inside the mouth and resistant to fire and decomposition; dental work is unique.
What is needed for a comparative dental identification?
Antemortem dental records of the missing person: notes, dental chart and X-rays from the treating dentist.
What is the effect of an unexplained discrepancy between dental records?
It excludes identity; explainable differences, such as later dental work, do not.
Connections
Educational content on forensic and legal medicine; not legal advice and no substitute for the technical guides of Colombia's National Institute of Legal Medicine and Forensic Sciences. Laws change: each page links the official text and says when it was last checked. For a real case, follow the guide in force and ask the competent authority.
Sources: Disaster Victim Identification Guide, Annexure 8: Methods of identification (INTERPOL, 2023); Estimation of age in forensic anthropology: historical perspective and recent methodological advances (Forensic Sciences Research, 2019).
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Representative model, for educational purposes only.