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Related Experiment Videos

Improved efficacy of some phosphate-based dentin-bonding agents.

E K Hansen, E C Munksgaard, E Asmussen

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

    Improving dental bonding agents involves specific treatments. Rinsing primed dentin and applying a second layer of certain chloro-substituted phosphate adhesives enhances their gap-reducing efficacy by dissolving the smear layer.

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    Area of Science:

    • Dental Materials Science
    • Adhesive Dentistry
    • Biomaterials

    Background:

    • Dentin-bonding agents are crucial for dental restorations.
    • The smear layer can impede adhesive bonding.
    • Phosphate-based agents are a common class of dental adhesives.

    Purpose of the Study:

    • To evaluate the gap-reducing efficacy of phosphate-based dentin-bonding agents.
    • To investigate the effect of dentin and bonding agent treatments on efficacy.
    • To explore potential mechanisms for improved bonding.

    Main Methods:

    • Extracted human teeth were used for the study.
    • Cylindrical butt-joint cavities were prepared on ground dentin surfaces.
    • Four phosphate-based dentin-bonding agents were tested with various treatment protocols.

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    Main Results:

    • Two chloro-substituted phosphate adhesives showed improved efficacy with specific treatments.
    • Treatments included rinsing primed dentin, air-drying, and applying a second bonding agent layer.
    • This protocol significantly enhanced the gap-reducing performance of these agents.

    Conclusions:

    • Specific treatment protocols can markedly improve the efficacy of certain phosphate-based dentin-bonding agents.
    • The mechanism is hypothesized to involve hydrogen chloride formation, aiding smear layer dissolution.
    • Optimized application techniques are vital for enhancing dental adhesive performance.