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Related Experiment Videos

Dental amalgam and mercury.

A M Aronsson1, B Lind, M Nylander

  • 1Department of Environmental Hygiene, Karolinska Institute, Stockholm, Sweden.

Biology of Metals
|January 1, 1989
PubMed
Summary

Dental amalgam fillings release mercury vapor, measurable in intraoral air and urine. Chewing gum significantly increases this mercury release, highlighting potential exposure risks from dental materials.

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Area of Science:

  • Environmental Health
  • Toxicology
  • Dental Materials Science

Background:

  • Dental amalgam, a common filling material, contains mercury.
  • Concerns exist regarding mercury release from dental amalgam and its health implications.

Purpose of the Study:

  • To quantify mercury levels in intraoral air and urine among individuals with dental amalgam.
  • To investigate the impact of food intake and chewing on mercury release.
  • To explore the correlation between amalgam load and mercury concentrations.

Main Methods:

  • Measurement of mercury concentration in intraoral air and urine.
  • Analysis of mercury levels before and after egg consumption.
  • Assessment of mercury release during chewing gum use.
  • Correlation analysis with the number of amalgam surfaces.

Main Results:

  • A notable decrease in intraoral mercury concentration was observed after egg intake.
  • Basal mercury levels in intraoral air ranged from 0.6-10.4 µg/m³ (median 4.3 µg/m³).
  • Urine mercury concentrations varied from <0.8-6.9 µg/g creatinine (median 1.9 µg/g creatinine).
  • Higher mercury concentrations correlated significantly with the number of amalgam surfaces.
  • Chewing gum increased intraoral mercury vapor concentrations significantly (median 19 µg/m³).

Conclusions:

  • Dental amalgam contributes to mercury exposure through intraoral air and urine.
  • Dietary intake and masticatory activity can influence mercury release from amalgam.
  • No evidence of renal damage was found based on urine protein levels.

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