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Related Experiment Videos

Dental amalgam: the materials.

S J Marshall1, G W Marshall

  • 1Department of Restorative Dentistry, University of California, San Francisco 94143.

Advances in Dental Research
|September 11, 1992
PubMed
Summary
This summary is machine-generated.

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Dental amalgams are dynamic materials that change microstructurally during clinical use, potentially releasing mercury. Future research aims to improve amalgam stability and reduce mercury release for better dental restoration performance.

Area of Science:

  • Dental Materials Science
  • Biomaterials Engineering
  • Corrosion Science

Background:

  • Dental amalgams are widely used restorative materials that undergo significant microstructural changes in the oral environment.
  • These changes are influenced by temperature, mechanical forces, and the corrosive nature of the mouth.
  • Amalgams are broadly classified into low copper (traditional) and high copper types, with high copper variants generally exhibiting superior clinical performance.

Purpose of the Study:

  • To describe the clinical use of dental amalgams.
  • To explain the mechanisms of mercury (Hg) release from set amalgams.
  • To propose strategies for developing mercury-free or reduced-mercury dental amalgams.

Main Methods:

  • Review of clinical performance data for low and high copper amalgams.

Related Experiment Videos

  • Analysis of microstructural changes in set amalgams under oral conditions.
  • Discussion of corrosion mechanisms and their impact on amalgam integrity and sealing.

    • Main Results:

    • High copper amalgams exhibit improved clinical performance, largely due to the near-elimination of the gamma 2 phase, which is prone to corrosion.
    • Corrosion, while generally undesirable, can contribute to self-sealing of restorations by depositing corrosion products at the margins.
    • Microstructural instability and corrosion are key factors leading to clinical deterioration of amalgam restorations.

    Conclusions:

    • Further research is essential to enhance the clinical performance and microstructural stability of dental amalgams.
    • Investigating mercury release from different amalgam types and assessing its toxicological potential is crucial.
    • Development of novel amalgam systems that minimize mercury exposure is a key future direction for dental materials innovation.