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Related Experiment Videos

Tooth eruption symmetry in functional lateralities.

T Heikkinen1, L Alvesalo, R H Osborne

  • 1Department of Oral Development and Orthodontics, Institute of Dentistry, Box 5281, 90014 University of Oulu, Oulu, Finland. tpth@sun3.oulu.fi

Archives of Oral Biology
|May 23, 2001
PubMed
Summary

This study found that non-right-sidedness in feet and eyes correlates with more symmetrical eruption of permanent teeth. This may offer insights into prenatal and early postnatal development.

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Area of Science:

  • Dentistry
  • Human Anatomy
  • Developmental Biology

Background:

  • Tooth eruption patterns can be influenced by various factors.
  • Understanding the symmetry of antimeric tooth eruption is crucial for developmental studies.

Purpose of the Study:

  • To investigate the association between functional lateralities (eyedness, handedness, footedness) and the symmetrical/asymmetrical eruption of permanent antimeric teeth.
  • To explore potential links between lateralities and prenatal/postnatal development indicators.

Main Methods:

  • A cross-sectional study of 2092 young North Americans.
  • Analysis of dental casts and oral photographs.
  • Assessment of functional lateralities and a four-grade eruption scale for antimeric teeth.

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Main Results:

  • Non-right-sidedness of feet and eyes showed a higher proportion of symmetrically erupting antimeric teeth.
  • Left-footedness was significantly linked to symmetrical eruption of maxillary first molars and mandibular lateral incisors.
  • Non-right-eyedness was associated with symmetrical eruption of maxillary central incisors.
  • True right-sidedness correlated with advanced eruption of the left mandibular first molar.

Conclusions:

  • Functional lateralities, particularly non-right-sidedness, are associated with variations in permanent tooth eruption symmetry.
  • Symmetrical and asymmetrical tooth eruption patterns may serve as indicators of prenatal and early postnatal growth and development.