In vitro fluoride uptake by enamel from different amine fluoride concentrations

Area of Science:

• Dental research
• Materials science
• Biomineralization

Background:

• Topical fluoride treatments are crucial for preventing dental caries.
• Amine fluoride solutions are widely used for their anticariogenic properties.
• Understanding the optimal concentration for fluoride uptake is essential for treatment efficacy.

Purpose of the Study:

• To investigate the effect of varying amine fluoride concentrations on fluoride uptake by dental enamel.
• To determine if a lower concentration of amine fluoride solution can maintain efficacy in topical treatments.
• To compare fluoride uptake across different concentrations of amine fluoride.

Main Methods:

• An in vitro study using enamel slabs from 31 impacted third molars.
• Exposure of enamel slabs to amine fluoride solutions of 1%, 0.5%, and 0.25% concentrations over three days.
• Measurement of KOH-soluble and structurally bound fluoride in treated enamel compared to an untreated control group.

Main Results:

• Fluoride uptake (KOH-soluble and structurally bound) increased significantly in all treated groups compared to the control.
• No significant difference in fluoride uptake was observed between 1% and 0.5% amine fluoride solutions.
• A significant difference in structurally bound fluoride was noted only between the 1% and 0.25% concentrations.

Conclusions:

• The fluoride concentration in amine fluoride solutions can be reduced by 50% without compromising its ability to form alkali-soluble or structurally bound fluoride.
• These findings support the potential for using lower concentrations of amine fluoride in topical treatments, aligning with previous clinical observations.
• Optimizing fluoride concentration may lead to more cost-effective and equally effective dental caries prevention strategies.