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Related Experiment Videos

A model for recording mercury release from an amalgam surface.

D Brune

    Biomaterials
    |September 1, 1985
    PubMed
    Summary

    Mercury release from dental amalgam decreases over time in saliva. Higher initial mercury release occurred in stimulated saliva compared to artificial saliva during in vitro testing.

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    Area of Science:

    • Materials Science
    • Biomaterials Science
    • Dental Materials

    Background:

    • Dental amalgams are widely used restorative materials.
    • Mercury release from amalgams is a concern for biocompatibility.
    • Understanding mercury release kinetics is crucial for assessing long-term safety.

    Purpose of the Study:

    • To quantify mercury release rates from different amalgam types.
    • To investigate the influence of saliva type on mercury release.
    • To explore the relationship between corrosion and mercury release.

    Main Methods:

    • In vitro measurement of mercury release from conventional, dispersed phase, and high copper amalgams.
    • Static immersion tests in stimulated and artificial saliva.
    • Corrosion current measurements on amalgam specimens.
    • Simulated toothbrushing to assess surface product removal.

    Main Results:

    • Mercury release rate decreased approximately exponentially with time for all amalgams.
    • Initial mercury release was higher in stimulated saliva than in artificial saliva.
    • Corrosion current also decreased exponentially with time.
    • Surface brushing increased corrosion current, indicating removal of loosely bound products.

    Conclusions:

    • Mercury release from dental amalgams is a time-dependent process.
    • Saliva composition significantly affects initial mercury release.
    • Corrosion plays a role in mercury release, with surface disturbance potentially increasing it.
    • A model for periodical mercury release from amalgam surfaces has been proposed.

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