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VariGlass fluoride release and uptake by an adjacent tooth
A Modesto1, O Chevitarese, J A Cury
1School of Dentistry, Federal University of Rio de Janeiro, Brazil.
American Journal of Dentistry
|June 1, 1997
Summary
Polyacid-modified resin composite restorations (VariGlass) demonstrated significant fluoride release and enamel uptake in vitro. Fluoride levels were highest initially and decreased over time, indicating a potential cariostatic effect.
Area of Science:
- Dental Materials Science
- Cariology
- Restorative Dentistry
Background:
- Dental caries remains a significant public health concern.
- Fluoride release from restorative materials can offer a cariostatic benefit.
- Polyacid-modified resin composites (PMRC) are designed to release fluoride.
Purpose of the Study:
- To quantitatively assess in vitro fluoride release from proximal VariGlass (PMRC) restorations.
- To evaluate the subsequent fluoride uptake by adjacent tooth enamel.
- To compare fluoride dynamics between PMRC and resin composite restorations.
Main Methods:
- Sixty impacted third molars were divided into control, resin composite, and PMRC groups.
- Restored and unrestored teeth were placed in contact under high caries challenge conditions for 14 days.
- Fluoride concentrations in de/remineralizing solutions and enamel fluoride uptake were measured using ANOVA and Tukey's tests.
Main Results:
- PMRC restorations exhibited the highest mean fluoride concentration in both demineralizing and remineralizing solutions (P < 0.01).
- Fluoride levels from PMRC gradually decreased over the 14-day period (P < 0.01).
- PMRC demonstrated the highest mean fluoride uptake into adjacent enamel, decreasing with enamel depth (P < 0.01).
Conclusions:
- VariGlass (PMRC) effectively releases fluoride in vitro.
- This fluoride release leads to significant uptake by adjacent enamel.
- PMRC restorations may contribute to caries prevention through sustained fluoride release and uptake.