Poly-3-hydroxybutyrate-silver nanoparticles membranes as advanced antibiofilm strategies for combatting peri-implantitis

• Published in: International journal of biological macromolecules Vol. 269; p. 131974
• Main Authors: Sanhueza, Claudia, Pavéz, Mónica, Hermosilla, Jeyson, Rocha, Sebastián, Valdivia-Gandur, Iván, Manzanares, María-Cristina, Beltrán, Víctor, Acevedo, Francisca
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier B.V 01-06-2024
• Subjects: Candida Albicans; Electrospinning; Poly-3-hydroxybutyrate; Pseudomonas aeruginosa; Silver nanoparticles; Staphylococcus aureus; Streptococcus mutans; Poly-3-hydroxybutyrate; Electrospinning; Pseudomonas aeruginosa; Candida Albicans; Silver nanoparticles; Staphylococcus aureus; Streptococcus mutans
• ISSN: 0141-8130; 1879-0003
• DOI: 10.1016/j.ijbiomac.2024.131974

Dental implant success is threatened by peri-implantitis, an inflammation leading to implant failure. Conventional treatments struggle with the intricate microbial and host factors involved. Antibacterial membranes, acting as barriers and delivering antimicrobials, may offer a promising solution. Thus, this study highlights the potential of developing antibacterial membranes of poly-3-hydroxybutyrate and silver nanoparticles (Ag Nps) to address peri-implantitis challenges, discussing design and efficacy against potential pathogens.
Electrospun membranes composed of PHB microfibers and Ag Nps were synthesized in a blend of DMF/chloroform at three different concentrations. Various studies were conducted on the characterization and antimicrobial activity of the membranes. The synthesized Ag Nps ranged from 4 to 8 nm in size. Furthermore, Young's modulus decreased, reducing from 13.308 MPa in PHB membranes without Ag Nps to 0.983 MPa in PHB membranes containing higher concentrations of Ag Nps. This demonstrates that adding Ag Nps results in a less stiff membrane. An increase in elongation at break was noted with the rise in Ag Nps concentration, from 23.597 % in PHB membranes to 60.136 % in PHB membranes loaded with Ag Nps.
The antibiotic and antibiofilm activity of the membranes were evaluated against Pseudomonas aeruginosa, Staphylococcus aureus, Streptococcus mutans, and Candida albicans. The results indicated that all PHB membranes containing Ag Nps exhibited potent antibacterial activity by inhibiting the growth of biofilms and planktonic bacteria. However, inhibition of C. albicans occurred only with the PHB-Ag Nps C membrane.
These findings emphasize the versatility and potential of Ag Nps-incorporated membranes as a multifunctional approach for preventing and addressing microbial infections associated with peri-implantitis. The combination of antibacterial and antibiofilm properties in these membranes holds promise for improving the management and treatment of peri-implantitis-related complications.
•The study involved synthesizing silver nanoparticles (Ag Nps) into the Poly-3-hydroxybutyrate (PHB) solution.•PHB solution containing silver nanoparticles was electrospun to develop scaffolds for tissue regeneration.•The antimicrobial activity of the PHB/Ag Nps scaffolds was evaluated over four different microorganisms.•The scaffolds loaded with Ag Nps showed a strong antibacterial activity over the different strains evaluated•Notably, inhibiting the growth of C. albicans required higher concentrations of Ag Nps loaded in scaffolds than the bacteria.