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Odontometric sexual dimorphism: a sibling correlation.

Sonali Sharma1, Ajit D Dinkar2, Sumit Bedi3

  • 1Senior Lecturer, Department of Oral Medicine and Radiology, Seema Dental College and Hospital , Veerbhadra Road, Rishikesh, Uttarakhand, India .

Journal of Clinical and Diagnostic Research : JCDR
|May 1, 2014
PubMed
Summary

Genetic factors influence tooth size differences between males and females. This study found significant correlations in specific tooth widths among siblings, indicating genetic control over sexual dimorphism in dentition.

Keywords:
Buccolingual tooth dimensionsCorrelation CoefficientMesiodistal tooth dimensions

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Area of Science:

  • Anthropology
  • Genetics
  • Odontology
  • Forensic Science

Background:

  • Teeth are valuable for anthropological, genetic, odontologic, and forensic research.
  • Sexual dimorphism in tooth size is a known phenomenon.
  • Understanding the genetic basis of this dimorphism is crucial.

Purpose of the Study:

  • To investigate the genetic control of sexual dimorphism in tooth size.
  • To analyze sibling pairs of Goan children aged 14-22 years.
  • To establish genetic influences on specific tooth dimensions.

Main Methods:

  • Studied 22 sibling pairs (22 males, 22 females).
  • Obtained alginate impressions of maxillary and mandibular arches.
  • Measured tooth dimensions using digital calipers (0.01 mm resolution).
  • Calculated correlations using Pearson's correlation coefficient.

Main Results:

  • Found significant associations in Mesiodistal Widths of permanent maxillary right/left second molars and first premolars.
  • Identified significant associations in Buccolingual Widths of mandibular right/left first premolars.
  • These correlations among siblings suggest genetic control.

Conclusions:

  • Confirmed a genetic basis for sexual dimorphism in human dentition.
  • Significant correlations in premolar widths between siblings support genetic influence.
  • Highlights the role of genetics in shaping tooth size and sexual dimorphism.