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Findings in 1,724 buccal smears from dentists.

J M Brady, D E Cutright, J D Beasley

    Journal of the American Dental Association (1939)
    |June 1, 1976
    PubMed
    Summary

    Dentists exposed to mercury showed no cellular changes in their buccal mucosa. Atypical smears in the general population are linked to fewer mature cells and thinner oral epithelium.

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    Area of Science:

    • Oral pathology
    • Dental occupational health
    • Toxicology

    Background:

    • Occupational exposure to mercury is a concern for dentists.
    • Buccal mucosa epithelial cells are a potential indicator of systemic health.
    • Previous studies have explored cellular changes related to environmental exposures.

    Purpose of the Study:

    • To investigate potential cellular alterations in dentists' buccal mucosa.
    • To correlate these changes with occupational mercury exposure.
    • To understand the cellular basis of atypical smears.

    Main Methods:

    • Examination of buccal mucosa epithelial cells using light microscopy.
    • Analysis via electron microscopy for ultrastructural details.
    • Assessment with electron probe for elemental composition.
    • Comparison of findings in dentists with mercury exposure data.

    Main Results:

    • No significant cellular changes were observed in dentists' buccal mucosa attributable to mercury exposure.
    • Class 2 atypical smears, found in approximately 0.01% of the normal population, were associated with reduced epithelial maturation.
    • A tendency toward keratinization was less evident in patients with class 2 smears, indicating a thinner epithelium.

    Conclusions:

    • Under the tested conditions, mercury exposure did not induce detectable changes in dentists' buccal mucosal cells.
    • Class 2 atypical smears reflect a less mature buccal epithelium, characterized by fewer highly keratinized cells.
    • Further research may be needed to explore other potential etiological factors for atypical smears.

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