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Fluoride concentrations in unerupted fluorotic human enamel.

A Richards¹, S Likimani, V Baelum

¹Department of Oral Anatomy, Dental Pathology and Operative Dentistry, Royal Dental College, Aarhus, Denmark.

Caries Research

|January 1, 1992

Summary

Fluoride levels in unerupted teeth increase with dental fluorosis severity. This fluoride uptake occurs during tooth formation, with minimal additional absorption before eruption.

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Area of Science:

Dental science
Biomineralization
Fluoride toxicology

Background:

Dental fluorosis is a condition resulting from excessive fluoride intake during tooth development.
Understanding fluoride distribution in enamel is crucial for assessing its effects.

Purpose of the Study:

To quantify fluoride concentrations in unerupted human enamel with varying degrees of dental fluorosis.
To investigate the relationship between fluoride profiles, fluorosis severity, and enamel depth.

Main Methods:

Serial acid etching of unerupted fluorotic enamel blocks (buccal and lingual surfaces).
Fluoride concentration analysis using chemical methods.
Assessment of fluorosis severity using the TF index, macroscopic, and microradiographic examination.

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Main Results:

Fluoride profiles in enamel were independent of fluorosis severity.
Higher fluoride concentrations correlated with increased fluorosis severity.
Fluoride levels in unerupted enamel matched those in erupted fluorotic enamel.

Conclusions:

The fluoride content of fluorotic enamel is primarily acquired during tooth formation.
Post-developmental fluoride uptake in enamel before eruption appears to be negligible.