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Updated: Nov 1, 2025
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Enhanced Genetic Analysis of Single Human Bioparticles Recovered by Simplified Micromanipulation from Forensic ‘Touch DNA’ Evidence
Published on: March 9, 2015
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Forensic human identification: Investigation into tooth morphotype and DNA extraction methods from teeth.
Laura Jane Heathfield1, Tarryn Elisabeth Haikney1, Calvin Gerald Mole1
1Division of Forensic Medicine and Toxicology, Department of Pathology, Faculty of Health Science, University of Cape Town, South Africa.
Summary
Tooth DNA profiling for human identification is crucial. Premolars and canines yield better results than molars, and diseased teeth improve DNA recovery, aiding in identifying human remains.
Area of Science:
- Forensic Science
- Genetics
- Anthropology
Background:
- Dental DNA is a vital source for human identification in decomposed remains.
- Optimal DNA extraction methods and factors influencing recovery remain unclear.
Purpose of the Study:
- To identify variables impacting DNA concentration, integrity, and profiling success from human teeth.
- To compare DNA recovery across different tooth morphotypes and conditions.
Main Methods:
- DNA extraction using QIAamp® DNA Investigator Kit and phenol-chloroform.
- Real-time PCR for DNA concentration and degradation index.
- Conventional DNA profiling.
Main Results:
- Premolars and canines were more successful for DNA profiling than molars.
- Fillings negatively impacted DNA quantity and quality.
- Diseased teeth (periodontitis) showed increased DNA concentration, integrity, and profiling success.
- No significant difference in profiling success between extraction methods, but complementary results were observed.
Conclusions:
- Tooth morphotype and condition significantly influence DNA profiling success.
- Diseased teeth and specific morphotypes (premolars, canines) are preferable for DNA recovery.
- Employing multiple DNA extraction methods enhances the chances of successful profiling from challenging samples.
Keywords:
DNA extractionDegraded DNAHuman identificationPhenol-chloroformQIAamp® DNA Investigator KitTooth morphotypeMore Related Videos
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