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Related Experiment Videos

Fluoride release from light-curing restorative materials.

U Müller1, A M Kielbassa, J Schulte-Mönting

  • 1Department of Operative Dentistry and Periodontology, School of Dental Medicine, Albert-Ludwigs University of Freiburg, Germany. mueller@zmk2.ukl.uni-freiburg.de

American Journal of Dentistry
|January 5, 2002
PubMed
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Fluoride release from dental composites and glass-ionomers is significantly higher in acidic conditions. Vitremer VLC and Compoglass F showed greater fluoride release than F2000 and Dyract AP in acidic environments.

Area of Science:

  • Dental Materials Science
  • Biomaterials Research
  • Restorative Dentistry

Background:

  • Dental composites and glass-ionomers are widely used restorative materials.
  • Fluoride release from these materials can contribute to caries prevention.
  • Understanding fluoride release kinetics is crucial for material selection and clinical efficacy.

Purpose of the Study:

  • To quantify and compare the in vitro fluoride release of three polyacid-modified resin-based composites (Dyract AP, Compoglass F, F2000) and one resin-modified glass-ionomer cement (Vitremer VLC).
  • To evaluate the effect of different buffer solutions (neutral pH 6.8 and acidic pH 4.0) on fluoride release over a 28-day period.

Main Methods:

  • Preparation of 30 cylindrical specimens for each of the four materials.

Related Experiment Videos

  • Storage of 15 specimens per material in 5 mL of either neutral (pH 6.8) or acidic (pH 4.0) buffer solution.
  • Measurement of fluoride content using a fluoride-sensitive electrode at multiple time points up to 28 days.
  • Statistical analysis using ANOVA and Kruskal-Wallis test.

    • Main Results:

    • All tested materials exhibited significantly higher fluoride release in the acidic buffer solution compared to the neutral buffer solution over 28 days (P < 0.001).
    • In acidic conditions, Vitremer VLC and Compoglass F demonstrated significantly greater fluoride release than F2000 and Dyract AP (P < 0.001).
    • In neutral conditions, Dyract AP showed the significantly lowest fluoride release (P < 0.001).

    Conclusions:

    • The in vitro fluoride release from polyacid-modified resin-based composites and resin-modified glass-ionomers is significantly influenced by the pH of the surrounding environment.
    • Acidic environments promote substantially higher fluoride release from these dental materials.
    • Clinical implications suggest that materials with higher fluoride release, particularly in acidic conditions, may offer enhanced cariostatic benefits.