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Global patterns of dental morphological variation: Revisiting ASUDAS trait frequencies
Rawad Qaq1, Ademir Franco2, Scheila Manica1
1School of Dentistry, University of Dundee, Park Place, Dundee DD1 4HN, UK.
Morphologie : Bulletin De L'Association Des Anatomistes
|January 13, 2026
Summary
Dental morphological traits, using the Arizona State University Dental Anthropology System (ASUDAS), offer insights into human variation. While generally reliable, trait frequencies show variability, necessitating nuanced interpretation in anthropological studies.
Area of Science:
- Anthropology
- Genetics
- Human Evolution
Background:
- Dental morphological traits are crucial for understanding human variation and population structure.
- The Arizona State University Dental Anthropology System (ASUDAS) is a key tool, but its reliability for population differences is debated.
Purpose of the Study:
- Identify frequently analyzed ASUDAS traits in recent research.
- Compare current trait frequencies with foundational data from Turner and Scott.
Main Methods:
- Systematic review of 43 studies (36,919 individuals).
- Meta-analysis of 29 frequently recorded traits using random-effects models.
Main Results:
- Significant heterogeneity observed in most traits, indicating discriminatory potential and population variability.
- Broad patterns align with ASUDAS expectations, but some traits show expanded regional ranges due to sample diversity and admixture.
Conclusions:
- ASUDAS traits remain valuable for broad morphological patterns.
- Emphasizes the need for multi-trait, population-specific, and context-specific approaches in dental anthropology.
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