Sabouhi M, Amini-Pozveh M, Bajoghli F, Dastjerd H, Mohammadi R. Synthesis and Characterization of Antifungal Nanocomposite AgSiO2 Polymethyl Methacrylate.
Eur J Dent 2021;
16:109-114. [PMID:
34384125 PMCID:
PMC8890906 DOI:
10.1055/s-0041-1731831]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Objectives
Polymethyl methacrylate as the most common material used in denture bases has some problems. The aim of this study was to introduce a new nanocomposite of PMMA to improve flexural strength and antifungal properties.
Materials and Methods
In this experimental study, AgSiO
2
nanoparticles were prepared, and their characteristics were confirmed by scanning electron microscope and energy dispersive spectroscopy techniques. Then the nanoparticles in the weight ratio of 0.1, 0.3, 0.5, and 0.7% were incorporated to heat-cured PMMA and the control group included no nanoparticles.
To measure the flexural strength before and after thermocycling three-point bending test was used. Eight samples per group with dimensions of 65 × 10 × 2.5 mm were used. Antifungal activity against
Candida albicans
(PTCC 5027) was investigated through colony count method. Statistical analysis was done by SPSS at significance level of
p
-value ≤0.05.
Results
The mean flexural strength in groups 0.1, 0.3, and 0.7% was significantly higher than the control. After thermocycling flexural strength of the control group was significantly lower than 0.3 and 0.5% groups. As the concentration of nanoparticles increased the antifungal activity improved (
p
< 0.05).
Conclusion
Addition of nanoparticles AgSiO
2
improved flexural strength and antifungal characteristics of PMMA.
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