Related Experiment Videos
Dental fluorosis: variability among different inbred mouse strains
E T Everett1, M A K McHenry, N Reynolds
1Oral-Facial Genetics Division, Department of Oral Facial Development, Indiana University School of Dentistry, Indianapolis 46202, USA. eeverett@iupui.edu
Journal of Dental Research
|October 31, 2002
Summary
Genetic factors influence dental fluorosis development. Researchers found significant differences in susceptibility among mouse strains, indicating a genetic component in this condition, which increases with optimal fluoride exposure.
Area of Science:
- Dental Research
- Genetics
- Toxicology
Background:
- Dental fluorosis prevalence is rising alongside declining dental caries rates.
- Dental fluorosis results from excessive fluoride exposure during tooth enamel formation (amelogenesis).
- The underlying mechanisms of dental fluorosis pathogenesis remain unclear.
Purpose of the Study:
- To investigate the hypothesis that genetic factors contribute to individual susceptibility or resistance to dental fluorosis.
- To identify potential genetic determinants involved in dental fluorosis development.
Main Methods:
- Utilized a controlled mouse model with continuously erupting incisors.
- Rigorously controlled variables including genotype, age, gender, diet, housing, and drinking water fluoride levels.
- Examined 12 inbred mouse strains to assess differences in dental fluorosis.
Main Results:
- Observed significant variations in dental fluorosis susceptibility and resistance across the 12 mouse strains.
- The A/J mouse strain exhibited high susceptibility with rapid and severe dental fluorosis.
- The 129P3/J mouse strain demonstrated the least impact, with minimal dental fluorosis.
Conclusions:
- These findings strongly support the role of a genetic component in the pathogenesis of dental fluorosis.
- Genetics appears to play a crucial role in determining an individual's response to fluoride exposure concerning dental health.
- Further research into specific genetic factors is warranted to understand dental fluorosis mechanisms better.