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Published on: March 29, 2018
Patterns of fluoro-gold entry into rat molar enamel, dentin, and pulp
1Department of Anesthesiology, Box 356540, University of Washignton, Seattle, 98195-6540, USA. Byersm@u.washington.edu
Journal of Dental Research
|March 26, 2003
Summary
Fluoro-Gold reveals enamel and dentin permeability in rat teeth. Tooth permeability is age-dependent and influenced by odontoblasts, with reparative dentin and injury affecting Fluoro-Gold influx.
Area of Science:
- Biomaterials Science
- Dental Research
- Histology
Background:
- Tooth enamel and dentin permeability are crucial for understanding dental caries, restorative material efficacy, and pulp-dentin-enamel interactions.
- Current understanding of these permeabilities remains incomplete, necessitating advanced imaging techniques.
Purpose of the Study:
- To investigate the permeability of enamel and dentin using Fluoro-Gold as a tracer in vital rat teeth.
- To evaluate the influence of aging, injury, neural function, and dentinal repair on Fluoro-Gold influx.
Main Methods:
- Utilized fluorescence microscopy and immunocytochemistry to track Fluoro-Gold distribution in rat teeth.
- Administered Fluoro-Gold to assess its penetration through enamel, dentin-enamel junction, and dentinal tubules.
Main Results:
- Fluoro-Gold rapidly permeated enamel and dentin, concentrating in odontoblasts for extended periods.
- Immature teeth exhibited the highest influx, while reparative dentin formation significantly impeded penetration.
- Tooth injury led to increased Fluoro-Gold influx and efflux, associated with odontoblast damage.
Conclusions:
- Tooth enamel and dentin permeability are age-related and interdependent, regulated by odontoblasts.
- Neural regulation did not significantly alter dentinal fluid movement as hypothesized.
- Fluoro-Gold serves as an effective tool for studying tooth permeability dynamics.
