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Related Experiment Videos

Man's mercury loading from a dental amalgam.

D Brune, D M Evje

    The Science of the Total Environment
    |July 1, 1985
    PubMed
    Summary
    This summary is machine-generated.

    Dental amalgam restorations release mercury into saliva, especially under chewing conditions. This mercury release, primarily as particles, may equal dietary intake, raising health concerns for dental mercury exposure.

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    Area of Science:

    • Biomaterials Science
    • Dental Materials
    • Environmental Health

    Background:

    • Dental amalgam, a widely used restorative material, contains mercury.
    • Concerns exist regarding mercury release from amalgam restorations under oral conditions.
    • Understanding mercury release mechanisms is crucial for assessing patient safety.

    Purpose of the Study:

    • To quantify mercury release from amalgam surfaces in simulated oral environments.
    • To investigate the effect of cyclic loading (chewing) versus static conditions on mercury release.
    • To estimate daily ionic mercury intake from dental amalgam restorations.

    Main Methods:

    • Utilized a nuclear tracer technique to monitor mercury release.
    • Studied amalgam surfaces in natural saliva under cyclic loading and static conditions.

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  • Simulated clinical conditions mimicking chewing and resting states.

    • Main Results:

    • Cyclic loading significantly enhanced amalgam surface degradation in saliva.
    • Corrosion products, including mercury, were loosely bound and removable by brushing.
    • Released mercury was predominantly in particle form, generated during cyclic loading.

    Conclusions:

    • Daily ionic mercury release was estimated at approximately 3 micrograms/cm².
    • Mercury intake from dental restorations could be comparable to dietary intake.
    • Findings highlight the potential significance of mercury release from dental amalgams.