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Root lengths in 47,XYY males' permanent teeth
1University Hospital of Oulu, Finland. rlahdesm@mail.student.oulu.fi
Journal of Dental Research
|September 24, 2004
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.
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.