Basic properties of novel S-PRG filler-containing cement

Area of Science:

• Dental Materials Science
• Biomaterials Engineering
• Caries Research

Background:

• Root caries is a significant dental issue, particularly in aging populations.
• Glass-ionomer cements (GICs) are used for root caries restoration due to their cariostatic properties.
• Novel formulations, such as surface pre-reacted glass-ionomer (S-PRG) fillers, aim to enhance GIC performance.

Purpose of the Study:

• To evaluate the effect of varying surface pre-reacted glass-ionomer (S-PRG) filler content on the properties of a novel cement for root caries treatment.
• To assess the impact of S-PRG incorporation on compressive strength, ion release, acid buffering capacity, and microstructure.

Main Methods:

• Five experimental cements were prepared with S-PRG filler content ranging from 0 to 40 wt%.
• Compressive strength, ion release (F-, Al, B, Na, Sr), acid buffering capacity, and microstructural analysis were performed on the prepared cements.

Main Results:

• Compressive strength was highest in the cement with 0 wt% S-PRG filler and decreased with increasing S-PRG content.
• Ion release profiles varied, with F- and Al highest in 0 wt% S-PRG, B highest in 40 wt% S-PRG, and higher Na and Sr release in 20-40 wt% S-PRG cements.
• Acid buffering capacity significantly increased with higher S-PRG filler content (40 wt% S-PRG exhibited the highest capacity).
• Microstructural analysis revealed no significant differences in surface structure across the tested S-PRG filler concentrations.

Conclusions:

• The incorporation of S-PRG fillers into dental cement presents a trade-off between mechanical strength and enhanced functional properties like acid buffering and ion release.
• The 40 wt% S-PRG cement demonstrated superior acid buffering capacity, suggesting potential benefits for managing root caries.
• Further research is warranted to optimize S-PRG content for a balance of mechanical integrity and cariostatic effects in root caries restorations.