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Updated: Aug 16, 2026
06:27
Expression of Cementitious Pore Solution and the Analysis of Its Chemical Composition and Resistivity Using X-ray Fluorescence
Published on: September 23, 2018
Fluoride release and absorption at different pH from glass-ionomer cements
M G Gandolfi1, S Chersoni, G L Acquaviva
1Center of Biomineralogy, Crystallography and Biomaterials, University of Bologna, Bologna Italy.
Dental Materials : Official Publication of the Academy of Dental Materials
|September 13, 2005
Summary
Glass-ionomer cements (GIC) release fluoride, with more release occurring at lower pH levels. Surface degradation, influenced by pH, impacts fluoride release and recharge potential.
Area of Science:
- Dental Materials Science
- Biomaterials Research
- Fluoride Chemistry
Background:
- Glass-ionomer cements (GIC) are widely used dental restorative materials.
- Fluoride release from GICs is a key property for caries prevention.
- Understanding fluoride release dynamics in varying pH environments is crucial for clinical application.
Purpose of the Study:
- To quantify fluoride release from two GIC types.
- To assess the impact of sodium fluoride (NaF) treatment on fluoride release.
- To investigate fluoride release in different pH conditions and its relation to surface degradation.
Main Methods:
- Fluoride release tests were conducted on GIC samples over time.
- Samples underwent NaF solution treatment to simulate fluoride recharge.
- Scanning Electron Microscopy (SEM) analyzed surface morphology before and after release tests in various pH solutions.
Main Results:
- GICs consistently released fluoride ions throughout the study period.
- Fluoride release was significantly higher in low pH environments compared to high pH.
- SEM revealed substantial surface degradation, correlating with increased fluoride release, and confirmed recharge capability.
Conclusions:
- GIC fluoride release is influenced by pH-induced surface degradation.
- Fluoride recharge is feasible across different pH levels using NaF solutions.
- GICs may be beneficial for patients with low pH saliva and high caries risk.
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