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Selenium uptake into teeth determined by fluorimetry.

J R Johnson, T R Shearer

    Journal of Dental Research
    |August 1, 1979
    PubMed
    Summary
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    Selenium levels in bovine teeth do not change with age or layer. Rat incisor selenium uptake directly correlates with dietary intake, and a new method for measuring trace selenium in hard tissues is described.

    Area of Science:

    • Biochemistry
    • Toxicology
    • Dental Research

    Background:

    • Selenium is an essential trace element with diverse biological roles.
    • Understanding selenium's deposition in hard tissues is crucial for toxicological and nutritional studies.
    • Previous methods for selenium analysis in hard tissues have limitations in sensitivity or complexity.

    Purpose of the Study:

    • To investigate selenium concentration gradients in bovine incisor enamel.
    • To determine the relationship between dietary selenium and rat incisor accumulation.
    • To present a novel, sensitive fluorimetric method for quantifying selenium in hard tissues.

    Main Methods:

    • Analysis of successive enamel layers from bovine incisors.
    • Feeding rats diets with varying selenium concentrations and analyzing incisor tissue.

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  • Development and application of a fluorimetric assay for trace selenium detection.

    • Main Results:

    • No significant concentration gradient of selenium was observed in bovine incisor enamel.
    • No age-related increase in selenium concentration was found in bovine incisors.
    • Selenium uptake in rat incisors was directly proportional to dietary selenium levels.

    Conclusions:

    • Bovine incisor enamel does not exhibit age-dependent selenium accumulation.
    • Dietary selenium directly influences accumulation in continuously growing rat incisors.
    • The presented fluorimetric method offers a sensitive and practical approach for hard tissue selenium analysis.