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Dental amalgam stabilization by selective interfacial amalgamation

L D Zardiackas, G E Stoner, F K Smith

    Biomaterials, Medical Devices, and Artificial Organs
    |January 1, 1976
    PubMed
    Summary
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    Researchers enhanced dental amalgam stability by selectively alloying the tooth-amalgam interface. This "selective interfacial amalgamation" process reduces corrosion, improving restoration longevity and utilizing existing amalgam benefits.

    Area of Science:

    • Dental Materials Science
    • Corrosion Engineering
    • Biomaterials

    Background:

    • Dental amalgam restorations are prone to corrosion in the oral environment.
    • The psi2 phase in conventional dental amalgams is susceptible to electrochemical degradation.
    • Improving the electrochemical stability of the tooth-amalgam interface is crucial for restoration longevity.

    Purpose of the Study:

    • To investigate the feasibility of "selective interfacial amalgamation" for enhancing dental amalgam electrochemical stability.
    • To reduce corrosion at the tooth-amalgam interface.
    • To create a more electrochemically stable phase adjacent to tooth structure.

    Main Methods:

    • Utilizing a silver suspension as a cavity liner before placing conventional silver-tin amalgam.

    Related Experiment Videos

  • Applying standard dental condensation techniques to express mercury.
  • Mercury reacting with the silver liner to form an integral restoration with a noble psi1 phase at the interface.

    • Main Results:

    • Selective interfacial amalgamation was successfully achieved.
    • The process readily formed an integral amalgam restoration.
    • In vitro corrosion tests showed significantly superior corrosion resistance compared to unlined controls.

    Conclusions:

    • Selective interfacial amalgamation is a feasible method to enhance dental amalgam electrochemical stability.
    • This technique effectively reduces corrosion by forming a more noble psi1 phase at the tooth-amalgam interface.
    • The method allows for the utilization of desirable qualities of existing dental amalgams while mitigating corrosion issues.