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Human dental arch shape evaluated by euclidean-distance matrix analysis

V F Ferrario1, C Sforza, A Miani

  • 1Laboratorio di Anatomia Funzionale dell'Apparato Stomatognatico, Facoltà di Medicina e Chirurgia, Università degli Studi, Milano, Italy.

American Journal of Physical Anthropology
|April 1, 1993
PubMed
Summary

Euclidean-distance matrix analysis revealed no significant shape differences in dental arches between males and females. However, male dental arches were found to be slightly larger in size compared to female dental arches.

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Area of Science:

  • Anthropometry
  • Dental Morphology
  • Biometrics

Background:

  • Assessing biological structure differences requires robust methodologies.
  • Euclidean-distance matrix analysis (EDMA) is a recent approach for differentiating size and shape variations using landmark data.
  • EDMA also identifies specific regions with the most significant differences.

Purpose of the Study:

  • To investigate sexual dimorphism in dental arch form using EDMA.
  • To analyze shape and size differences in the dental arches of adult males and females.

Main Methods:

  • Utilized EDMA on dental casts from 50 men and 45 women (aged 20-27).
  • Defined 14 landmarks on the occlusal surfaces of permanent teeth (second molar to second molar).
  • Computed inter-landmark distances to create mean form matrices for each dental arch and sex.

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Main Results:

  • No statistically significant differences were found in dental arch shape between sexes.
  • A slight, but not statistically significant, increase in size was observed in male dental arches compared to female arches.

Conclusions:

  • Dental arch shape is largely consistent between adult males and females.
  • While male dental arches tend to be larger, shape is not a significant differentiating factor for sexual dimorphism in this sample.