Effect of Green Gold Nanoparticles Synthesized with Plant on the Flexural Strength of Heat‑polymerized Acrylic Resin

The aim of this study was to investigate the effect of gold nanoparticle on
the flexural strength of polymethyl methacrylate (PMMA). Materials and Methods:
PMMA specimens (65 mm × 10 mm × 3.3 mm) containing different sizes (45 nm,
55 nm, and 65 nm) and concentrations (0.05% and 0.2%) of gold nanoparticles were
prepared, along with a control group containing no added nanoparticles. Flexural
strength of all specimens was measured, and one‑way ANOVA and Tukey–Kramer
post hoc multiple comparisons tests were performed to identify statistical differences
between groups. Results: The addition of gold nanoparticles increased the flexural
strength of acrylic resin. Significantly greater increases were obtained with
lower concentrations (0.05%) when compared to higher concentrations (0.20%).
Conclusion: Differences in concentrations of gold nanoparticles added to PMMA
have significantly different effects on PMMA flexural strength, whereas differences
in sizes of gold nanoparticles added to PMMA do not significantly affect its
flexural strength. Accordingly, adding gold nanoparticles to PMMA may enhance
the mechanical properties of denture bases used in clinical practice