Fluoride release from a fluoride-containing amalgam and two luting cements.

Area of Science:

• Dental Materials Science
• Biomaterials
• Fluoride Chemistry

Background:

• Fluoride release from dental restorative materials is crucial for caries prevention.
• Amalgam and luting cements are commonly used in dental restorations.
• Understanding the long-term fluoride release profile is essential for clinical efficacy.

Purpose of the Study:

• To investigate and compare the fluoride release patterns of dental amalgam, silicophosphate cement, and polycarboxylate cement.
• To quantify fluoride uptake by hydroxyapatite from these materials over time.

Main Methods:

• Dental materials (amalgam, silicophosphate, polycarboxylate) were tested for fluoride release.
• Test specimens were shaken in a hydroxyapatite solution.
• Fluoride uptake by hydroxyapatite was measured to determine release rates.

Main Results:

• All three materials exhibited significant initial fluoride release.
• Dental amalgam showed minimal fluoride release after one week.
• Silicophosphate and polycarboxylate cements continuously released fluoride over a 5-week period, comparable to silicate cements.

Conclusions:

• Luting cements (silicophosphate and polycarboxylate) offer sustained fluoride release compared to amalgam.
• The continuous fluoride liberation from these cements may provide ongoing cariostatic benefits.
• Material selection impacts long-term fluoride availability in the oral environment.