Graphene nanoplatelets embedded polymer: An efficient endodontic material for root canal therapy.

Area of Science:

• Biomaterials Science
• Polymer Chemistry
• Dental Materials

Background:

• Designing effective endodontic obturating materials for root canal therapy presents significant clinical challenges.
• Current materials may lack optimal biocompatibility, adhesion, or antimicrobial properties.

Purpose of the Study:

• To develop and characterize a novel polymer nanocomposite for endodontic obturation.
• To evaluate the mechanical, adhesive, and antibacterial properties of the new material compared to commercial gutta-percha.

Main Methods:

• Synthesized a polymer nanocomposite using reversible addition-fragmentation chain-transfer (RAFT) polymerization of methacrylic acid and methylene glycol dimethacrylate, embedding reduced graphene oxide nanoplatelets (rGO).
• Characterized mechanical properties (tensile strength, elongation at break) and surface morphology using atomic force microscopy.
• Assessed antibacterial efficacy against E.coli and S. aureus by measuring inhibition zones after incubation.

Main Results:

• The developed graphene nanoplatelets (GNPs) exhibited tensile strength (27-36%) and elongation at break (2.1-3.1%) comparable to commercial gutta-percha (GP-C).
• Atomic force microscopy revealed crystalline spikes on the GNP surface, enhancing bio-interface adhesion.
• GNPs demonstrated 95% greater effectiveness in inhibiting bacterial colonization, with significant inhibition zones (6.8 mm for E.coli, 4.3 mm for S. aureus) without affecting cell integrity.

Conclusions:

• The novel polymer nanocomposite (GNPs) offers a biocompatible, adhesive, and potent antibacterial alternative for endodontic obturation.
• This material shows significant potential to improve outcomes in future root canal therapies.
• The unique surface morphology and rGO integration contribute to the enhanced performance of the endodontic material.