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Related Experiment Videos

Glass ionomer cement surface protection

M C Serra1, M F Navarro, S F Freitas

  • 1Piracicaba School of Dentistry, University of Campinas, São Paulo, Brazil.

American Journal of Dentistry
|August 1, 1994
PubMed
Summary

Nail varnish effectively protected glass ionomer cement (GIC) restorations from dye uptake. This study evaluated various surface treatments to determine the best option for GIC protection.

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Area of Science:

  • Dental Materials Science
  • Restorative Dentistry
  • Biomaterials

Background:

  • Glass ionomer cement (GIC) is a widely used dental restorative material.
  • Protecting the surface of GIC during setting is crucial to prevent early degradation and improve longevity.
  • Various surface sealants are available, but their comparative effectiveness on GIC dye uptake is not fully elucidated.

Purpose of the Study:

  • To assess the efficacy of different surface treatments in reducing dye penetration into glass ionomer cement.
  • To quantify the protective effect of various agents using spectrophotometric analysis of methylene blue uptake.

Main Methods:

  • Sixty GIC specimens were prepared and divided into ten groups, including positive and negative controls.
  • Experimental groups were treated with different surface agents: bonding resins, varnishes, and Vaseline.

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  • Specimens were immersed in methylene blue solution, and dye uptake was measured spectrophotometrically after acid treatment.

    • Main Results:

    • All tested surface agents demonstrated a protective effect against dye uptake compared to the unprotected positive control.
    • Nail varnish (Colorama) exhibited the lowest mean dye uptake (3.29 ± 0.79 µg dye/restoration).
    • Other agents like Shofu varnish, Copalite varnish, and bonding resins showed moderate protection, while Vaseline showed less effectiveness.

    Conclusions:

    • Various surface treatments can effectively protect setting glass ionomer cement from early staining and degradation.
    • Nail varnish emerged as the most effective surface treatment among those tested for reducing dye uptake in GIC.
    • Further research could explore the long-term clinical performance and biocompatibility of these surface agents.