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Related Experiment Videos

[Normal and induced Hg release from different amalgams]

M Zimmermann1, R Mairgünther, T Scheuber

  • 1Klinik und Poliklinik für Kieferchirurgie, Universität München.

Schweizer Monatsschrift Fur Zahnmedizin = Revue Mensuelle Suisse D'Odonto-Stomatologie = Rivista Mensile Svizzera Di Odontologia E Stomatologia
|January 1, 1993
PubMed
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Dental amalgams containing gamma-2 caused higher mercury (Hg) levels in urine compared to gamma-2-free versions. Dimaval enhanced mercury elimination, but levels remained safe. Gamma-2-free amalgams are recommended.

Area of Science:

  • Dental materials science
  • Toxicology
  • Environmental health

Background:

  • Dental amalgam is a widely used restorative material.
  • Concerns exist regarding mercury release from dental amalgams.
  • The presence of gamma-2 phase in amalgam composition may influence mercury release.

Purpose of the Study:

  • To compare mercury load from gamma-2 containing and gamma-2 free dental amalgams.
  • To assess the effect of Dimaval on mercury elimination after amalgam exposure.
  • To evaluate the toxicological relevance of mercury exposure from dental amalgams.

Main Methods:

  • Experimental investigation with 20 subjects without prior amalgam fillings.
  • Standardized application of artificial amalgam surfaces (gamma-2 containing and gamma-2 free).

Related Experiment Videos

  • Measurement of mercury concentrations in 24-hour urine samples before and after challenge with Dimaval.

    • Main Results:

    • Amalgam containing gamma-2 significantly increased mercury concentrations in urine.
    • Dimaval administration intensified mercury elimination rate.
    • All measured mercury levels remained below toxicologically relevant concentrations.

    Conclusions:

    • Gamma-2 containing dental amalgams contribute to increased mercury load.
    • Use of gamma-2 free amalgams is advisable to minimize heavy metal exposure.
    • Development of improved dental materials and enhanced caries prevention are crucial.