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Related Experiment Videos

Root lengths in 47,XYY males' permanent teeth.

R Lähdesmäki1, L Alvesalo

  • 1University Hospital of Oulu, Finland. rlahdesm@mail.student.oulu.fi

Journal of Dental Research
|September 24, 2004
PubMed
Summary

The Y chromosome promotes longer tooth roots in males with 47,XYY syndrome. This dental growth effect continues after crown development, indicating extended growth periods in these individuals.

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Area of Science:

  • Genetics
  • Dentistry
  • Human Biology

Background:

  • The Y chromosome is known to influence tooth crown growth.
  • Sex chromosome anomalies can impact overall development.

Purpose of the Study:

  • To investigate permanent tooth root lengths in males with 47,XYY syndrome.
  • To determine if the Y chromosome's effect on dental growth extends to root development.

Main Methods:

  • Measurements of permanent tooth root lengths were taken from panoramic radiographs.
  • Comparison of tooth root lengths between 47,XYY males and control groups (males and females).

Main Results:

  • 47,XYY males exhibited significantly longer tooth roots compared to control males and females.
  • The Y chromosome's promoting effect on dental growth persists in root dentin post-crown completion.

Conclusions:

  • The Y chromosome promotes increased tooth root dentin growth in 47,XYY males.
  • This suggests a prolonged period of growth excess, potentially influenced by Y chromosome factors, from infancy to adolescence.

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