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Related Experiment Videos

Ion processes in glass ionomer cements.

R W Billington1, J A Williams, G J Pearson

  • 1Biomaterials in Relation to Dentistry, Institute of Dentistry, Queen Mary University of London, Medical Science Building, Mile End Road, London E1 4NS, UK. r.w.billington@qmul.ac.uk

Journal of Dentistry
|April 1, 2006
PubMed
Summary

This study investigates ion processes in glass-ionomer cements, revealing diffusion-controlled fluoride release and significant ion uptake. Further analysis is needed to fully understand ion interactions and cement degradation mechanisms.

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Uptake of fluoride ions by the glass component of glass ionomer cement.

Journal of dentistry·2007

Area of Science:

  • Dental Materials Science
  • Biomaterials Chemistry
  • Ion Transport Phenomena

Background:

  • Glass-ionomer cements (GICs) rely on complex ion interactions for matrix formation and properties.
  • Previous research has explored ion release and uptake but lacks a complete matrix composition understanding.
  • The role of phosphorus in controlling glass ion release is recognized.

Purpose of the Study:

  • To synthesize existing knowledge on ion processes in GICs.
  • To investigate ion release kinetics and mechanisms from set GICs.
  • To explore ion uptake and surface degradation phenomena in GICs.

Main Methods:

  • Literature synthesis to approximate GIC matrix composition.
  • Analysis of ion release data (e.g., fluoride) over extended periods (>7 days to 3 years).

Related Experiment Videos

  • Review of surface analysis techniques (SIMS, XPS) for ion location and elemental association.

    • Main Results:

    • Fluoride (F-) ion release from set GICs follows a diffusion-controlled process (t1/2 relationship).
    • Substantial ion uptake by GICs from surrounding solutions occurs, exceeding equilibrium levels.
    • Surface disruption is accelerated by F- and monofluorophosphate ions in F-containing GICs.

    Conclusions:

    • A comprehensive understanding of GIC matrix composition requires further investigation.
    • Ion chromatography and Time-of-Flight Secondary Ion Mass Spectrometry (ToF SIMS) are recommended for detailed ionic species analysis.
    • Elucidating the mechanism of surface disruption is crucial for GIC stability and longevity.