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Related Concept Videos

Tooth Anatomy01:21

Tooth Anatomy

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The human tooth enables us to eat a variety of foods, speak clearly, and even aid in shaping our faces. Teeth are composed of various elements that work together. Here's a detailed look at the anatomy of a human tooth.
The Crown, Neck, and Root
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Related Experiment Video

Updated: Dec 11, 2025

Systematic Assessment of Mammalian Skull Specimens for Dental and Temporomandibular Joint Pathology
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The Eskimo-Aleut Dentition: Crown and Root Morphology.

Richard G Scott1

  • 1Department of Anthropology, University of Nevada Reno.

Acta Stomatologica Croatica
|August 18, 2020
PubMed
Summary

Dental morphology of Eskimo-Aleut populations reveals significant contrasts with Europeans, primarily due to genetic drift and founder effects. Some traits may reflect natural selection linked to the EDAR V370A allele.

Area of Science:

  • Anthropology
  • Genetics
  • Forensic Science

Background:

  • Dental variation in Eskimo-Aleut populations is examined.
  • Comparison includes closely related American Indians and distantly related Europeans.

Purpose of the Study:

  • To provide an overview of tooth crown and root morphology in Arctic Eskimo-Aleut populations.
  • To compare dental variation among Eskimo-Aleuts, American Indians, and Europeans.

Main Methods:

  • Analysis of approximately 10,000 dentitions.
  • Scoring of 16 crown and 5 root traits using the Arizona State University Dental Anthropology System.

Main Results:

  • Most dental traits showed dramatic contrasts between New World populations (Eskimo-Aleuts, American Indians) and Europeans.

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  • Eskimo-Aleuts and American Indians exhibited differences in specific traits like UI1 winging, shoveling, UM1 Carabelli trait, and molar root number.

    • Conclusions:

    • Observed dental differences are likely attributed to genetic drift and founder effect.
    • Recent findings suggest natural selection may influence traits like shoveling and molar cusp number via the EDAR V370A allele.