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Related Experiment Videos

Direct metallic amalgam alternative: a research update

F C Eichmiller1, W A Marjenhoff, M P Dariel

  • 1American Dental Association Health Foundation, Paffenbarger Research Center, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA.

MSDA Journal : Journal of the Maryland State Dental Association
|October 1, 1996
PubMed
Summary
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Researchers developed a mercury-free, silver-based dental filling material using powder technology. This innovative approach relies on cold-welding of silver surfaces for a cohesive dental restoration.

Area of Science:

  • Materials Science
  • Dental Materials Science
  • Biomaterials

Background:

  • Conventional dental amalgams contain mercury, raising environmental and health concerns.
  • The National Institute of Standards and Technology (NIST) explored mercury-free alternatives for direct dental fillings.
  • Powder metallurgy principles are foundational to amalgam technology.

Purpose of the Study:

  • To investigate a novel mercury-free, silver-based dental filling material.
  • To adapt powder technology for creating cohesive dental restorations without mercury.
  • To explore the cold-welding mechanism for amalgam-like materials.

Main Methods:

  • Development of a silver-based powder mixture, retaining tin and silver components.
  • Surface treatment using mild acid to achieve atomically clean interfaces.

Related Experiment Videos

  • Condensation of the powder mixture to induce cold-welding and form a cohesive solid.

    • Main Results:

    • A mercury-free, silver-based dental filling material was conceptualized and developed.
    • The material's cohesion relies on cold-welding of silver-silver interfaces.
    • Collaboration between NIST, National Institute of Dental Research (NIDR), and American Dental Association Health Foundation (ADAHF) is ongoing.

    Conclusions:

    • A promising mercury-free dental filling technology based on silver and powder metallurgy is emerging.
    • Cold-welding of acid-treated silver surfaces is the key mechanism for material cohesion.
    • Continued research and development by NIST and ADAHF scientists aim to advance this dental material.