Long-Term Fluoride Release from Dental Resins Affects STRO-1+ Cell Behavior.

Area of Science:

• Biomaterials Science
• Dental Research
• Stem Cell Biology

Background:

• Fluoride-releasing dental materials aid in dentin remineralization and secondary caries prevention.
• The impact of varying fluoride release patterns on dental pulp stem cell behavior remains largely unexplored.

Purpose of the Study:

• To investigate how different fluoride release kinetics from dental resins influence human dental pulp stem cells (STRO-1(+) cells).
• To assess the effects on stem cell migration and differentiation into odontoblast-like cells.

Main Methods:

• Two dental resins with distinct fluoride release profiles (RK-F10 and RK-FG10) were used.
• STRO-1(+) cells were exposed to the resins, and their migratory responses to TGF-β1 and SDF-1 were measured.
• Odontoblast differentiation markers (DSPP, DMP1, OCN, MEPE) were analyzed.

Main Results:

• Continuous low-level fluoride release from RK-F10 enhanced STRO-1(+) cell migration.
• RK-F10 facilitated complete odontoblast-like cell differentiation.
• RK-FG10, with an initial burst release, showed no significant effects on migration or differentiation.

Conclusions:

• Fluoride release kinetics, not just concentration, are critical for designing effective fluoride-releasing restorative dental materials.
• Continuous, sustained fluoride release is more beneficial for dental pulp stem cell activity and regeneration.