Influence of AgVO3 incorporation on antimicrobial properties, hardness, roughness and adhesion of a soft denture liner

Abstract

The objective of this in vitro study was to investigate the effect of nanostructured silver vanadate decorated with silver nanoparticles (AgVO 3 ) on antimicrobial activity, hardness, roughness, and adhesion of a soft denture liner. The antimicrobial efficacy of the Trusoft (Boswoth) liner incorporated with different concentrations of AgVO 3 against Enterococcus faecalis , Pseudomonas aeruginosa , Candida albicans , and Staphyloccocus aureus (n = 5) was evaluated by the agar diffusion method. Roughness, hardness, and adhesion properties were also evaluated. The data were analyzed by analysis of variance (ANOVA) and Tukey’s multiple comparison test with significance at the p < 0.05 level. At concentrations of 1 and 2.5%, AgVO 3 incorporation was effective only against E . faecalis , and at 5 and 10%, against E . faecalis , P . aeruginosa , and C . albicans . None of the concentrations was effective against S . aureus . A decrease in hardness was found for the 1, 2.5, and 10% AgVO 3 concentrations (p < 0.001) and at 5%, hardness was not affected. None of the concentrations affected the roughness of the material. A significant increase in tensile values was observed between the liner and heat-curing acrylic resin for 2.5% (p < 0.001) and 10% (p = 0.042) concentrations. AgVO 3 incorporation to a soft denture liner promoted antimicrobial activity against E . faecalis , P . aeruginosa , and C . albicans without affecting roughness, maintaining the hardness properties recommended for soft and extra soft liners, and improving the adhesion between the liner and the acrylic resin used for dentures.

PCL/β‐AgVO3 nanocomposites obtained by solvent casting as potential antimicrobial biomaterials

“…The large atomic number difference between SV nanorods and AgNPs results in a strong contrast, being the AgNPs darker in TEM image. The AgNPs decorated on SV nanorods are expected to exhibit enhanced antimicrobial performance, since the antimicrobial activity happens with the contact between the bacteria and Ag + ions released by Ag‐decorated SV 29 …”

“…The AgNPs decorated on SV nanorods are expected to exhibit enhanced antimicrobial performance, since the antimicrobial activity happens with the contact between the bacteria and Ag + ions released by Ag-decorated SV. 29 Figure 5 shows the morphological surface of neat PCL, PCL/0.1SV, PCL/0.5SV, and PCL/1.0SV nanocomposite films. All samples present smooth surface, with small pores, resulting from the solvent evaporation process.…”

“…The authors observed antibacterial action from the concentration of 2.5% SV in S. aureus. Kreve et al, (2019) 29 noticed in the same methodology that SV particles mixed in denture F I G U R E 7 Concentration of (a) Staphylococcus aureus and Escherichia coli (b) (colony forming units per milliliter, CFU ml −1 ) after 24 h of contact with neat PCL and PCL/SV nanocomposites. The results are represented by the mean and standard deviation.…”

“…β‐AgVO 3 nanoparticle has shown promising antimicrobial activity on Gram‐positive bacteria ( Staphylococcus aureus 21 and Enterococcus faecalis ), Gram‐negative bacteria ( Escherichia coli 28 and Pseudomonas aeruginosa ) and fungi ( Candida albicans 29 ), reaching a broad spectrum of antimicrobial action. β‐AgVO 3 has shown antimicrobial potential in dental resin 30 due to the ability to act on the surface of bacteria, which may vary according to the shape, size, and surface charge of the particle 30 …”

Influence of modification of dental porcelains with hybrid nanomaterial on surface characteristics, antimicrobial, chemical, and mechanical properties

“…In dentistry, the β-AgVO 3 was incorporated in several dental materials such as acrylic resins, denture liners, impression materials, endodontic sealers, and prosthetic components, and demonstrated antimicrobial activity against Streptococcus mutans, Candida albicans, Staphylococcus aureus, Pseudomonas aeruginosa, Enterococcus faecalis and Escherichia coli [12][13][14][15][16][17][18][19].…”