Ionic Dimethacrylates for Antimicrobial and Remineralizing Dental Composites.

Area of Science:

• Dental Materials Science
• Polymer Chemistry
• Biomaterials Engineering

Background:

• Development of advanced dental restorative materials is crucial for improved oral health.
• Need for multifunctional dental resins with antibacterial and remineralizing capabilities.

Purpose of the Study:

• To synthesize and characterize two novel ionic dimethacrylates (IDMA1 and IDMA2).
• To evaluate the impact of IDMAs on the properties of urethane dimethacrylate (UDMA)-based copolymers.
• To assess the antibacterial and remineralization potential of IDMA-containing dental composites.

Main Methods:

• Nucleophilic substitution reactions for IDMA synthesis.
• Multi-step extraction and spectroscopic techniques (NMR, MS) for purification and validation.
• Water contact angle, vinyl conversion, and flexural strength measurements.
• In vitro cytotoxicity assays on fibroblasts and ion release studies for remineralization.

Main Results:

• IDMAs were successfully synthesized and validated.
• IDMAs did not significantly alter the wettability of UDMA-based copolymers.
• Increased vinyl conversion rates were observed with IDMA incorporation.
• A reduction in flexural strength was noted, but deemed acceptable.
• IDMAs exhibited no cytotoxicity to fibroblasts at relevant concentrations.
• Evidence of remineralization potential through calcium and phosphate ion release.

Conclusions:

• IDMAs are promising candidates for multifunctional antibacterial and remineralizing dental composites.
• Despite reduced flexural strength, IDMAs warrant further investigation.
• Comprehensive biological, physicochemical, mechanical, and antibacterial evaluations are recommended for clinical prototype selection.