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Resin-modified glass-ionomers

J F McCabe1

  • 1Dental School, University of Newcastle upon Tyne, UK.

Biomaterials
|June 30, 1998
PubMed
Summary
This summary is machine-generated.

Resin-modified glass-ionomers show high water absorption and variable mechanical properties. Further research is needed to clarify fluoride release and clinical significance for these dental materials.

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Area of Science:

  • Dental Materials Science
  • Biomaterials Engineering

Background:

  • Resin-modified glass-ionomers (RMGIs) are widely used dental restorative materials.
  • Their properties and clinical performance are continually being evaluated and refined.

Purpose of the Study:

  • To review the current status of resin-modified glass-ionomers.
  • To present recent research findings on key aspects of RMGI performance.
  • To address issues regarding nomenclature and standardization.

Main Methods:

  • Literature review of current research on RMGIs.
  • Analysis of setting characteristics, water absorption, mechanical properties, adhesion, and fluoride release.
  • Discussion of clinical significance and standardization needs.

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Main Results:

  • Setting characteristics are similar to light-activated composites, with some sensitivity to ambient light and limited working time.
  • High water absorption and swelling observed, with unknown clinical significance.
  • Mechanical properties vary based on resin content, falling between composites and conventional glass-ionomers.
  • Adhesion to enamel may require etching; dentine bonding is complex.
  • Fluoride release is highly dependent on water exchange rates, requiring dynamic testing for accurate assessment.

Conclusions:

  • Nomenclature debates are unproductive; application-based ISO standards are needed.
  • RMGI properties present a mixed profile requiring careful consideration for clinical application.
  • Further standardization of testing is crucial for evaluating fluoride release and clinical efficacy.