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Related Experiment Videos

Fluoride ion release from two methacrylate polymer systems

M P Patel1, G J Pearson, M Braden

  • 1IRC in Biomedical Materials, Department of Biomaterials in Relation to Dentistry, St. Bartholomews and the Royal London School of Medicine and Dentistry, Queen Mary and Westfield College, UK.

Biomaterials
|December 24, 1998
PubMed
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Fluoride ion release from polymer systems was studied. Fluoride release followed Fickian diffusion, independent of water uptake, offering insights into dental material stability.

Area of Science:

  • Polymer Science
  • Materials Science
  • Biomaterials

Background:

  • Room-temperature polymerizing systems are crucial in dental applications.
  • Understanding ion release from these polymers is vital for material longevity and efficacy.
  • Fluoride-containing polymers are investigated for potential therapeutic benefits.

Purpose of the Study:

  • To investigate the release kinetics of fluoride ions from two distinct polymer matrices.
  • To analyze the influence of fluoride incorporation on polymer water uptake.
  • To determine the relationship between water uptake and fluoride release mechanisms.

Main Methods:

  • Two polymer systems, poly(ethyl methacrylate) (PEM) with tetrahydrofurfuryl methacrylate (THFM) and n-butyl methacrylate (nBM), were prepared with sodium and potassium fluoride.

Related Experiment Videos

  • Water uptake measurements were conducted on the prepared polymer systems.
  • Fluoride ion release was monitored over time, and diffusion coefficients were calculated.
  • The release process was characterized as Fickian or non-Fickian.

    • Main Results:

    • Fluoride incorporation significantly increased water uptake in both polymer systems, with a more pronounced effect in the PEM/THFM system.
    • Water uptake demonstrated a monotonic relationship with the molarity of added fluoride.
    • The water uptake process was generally non-Fickian.
    • Fluoride ion release followed Fickian diffusion kinetics across all tested systems.
    • Calculated diffusion coefficients and the amount of fluoride released were independent of the degree of water uptake.

    Conclusions:

    • The study elucidates the distinct mechanisms governing water uptake and fluoride release in these polymer systems.
    • Fickian diffusion governs fluoride release, providing predictable release profiles.
    • Water uptake does not directly correlate with fluoride release rates, suggesting complex interactions within the polymer matrix.
    • Findings are relevant for the design and application of fluoride-releasing dental polymers.