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Related Experiment Videos

Low-silver amalgam restorations: a two-year clinical evaluation.

P E Capel Cardoso, W Gomes Miranda, J F Ferreira Santos

    Dental Materials : Official Publication of the Academy of Dental Materials
    |July 1, 1989
    PubMed
    Summary

    This study evaluated dental amalgam restorations using low-silver, high-copper alloys over two years. Most restorations maintained excellent marginal integrity, though superficial luster was quickly lost.

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    Area of Science:

    • Dental Materials Science
    • Clinical Dentistry

    Background:

    • Dental amalgam remains a widely used restorative material.
    • High-copper amalgams offer improved properties compared to traditional low-copper formulations.
    • Evaluating long-term clinical performance is crucial for material selection.

    Purpose of the Study:

    • To assess the clinical performance of dental amalgam restorations.
    • To evaluate four proprietary low-silver, high-copper amalgam alloys.
    • To determine restoration longevity and integrity over a two-year period.

    Main Methods:

    • A clinical survey was conducted over two years.
    • Restorations were made using four specific low-silver, high-copper amalgam alloys.
    • Evaluation followed the United States Public Health Service (USPHS) criteria.

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    Main Results:

    • Marginal integrity was highly satisfactory for restorations made with three of the four alloys.
    • One alloy exhibited less satisfactory marginal integrity.
    • All tested amalgam restorations showed a rapid loss of superficial luster.

    Conclusions:

    • Low-silver, high-copper dental amalgams generally demonstrate good marginal integrity.
    • Aesthetic factors, specifically luster, may be compromised in the short term.
    • Further research into alloy composition for improved aesthetics is warranted.