To determine the effects of various concentrations of nano zirconia particles on the tensile strength of poly metyl methacrylate material
Keywords:
Zirconium oxide, nanoparticles, denture baseAbstract
Objective: The aim of this study was to determine the tensile strength of Poly methyl methacrylate denture base material before and after addition of various concentrations of Nano- Zirconia. Study design: Experimental study, Laboratory based. Materials and Methods: 60 Dumb bell shaped specimens were prepared from heat polymerized acrylic resins and were divided into six groups. (n=10). Zirconia nanoparticles size and shape was observed under TEM. Zirconia nanoparticles surfaces were treated with silane coupling agent and was observed under Fourier Transform Infrared Spectroscopy FTIR. Nano Zirconia particles were not added in the control group while test groups were reinforced with 1%,3%,7%,10%,12% Nano Zirconia. Tensile strength test was applied with the help of Tensile testing machine. With the help of Scanning electron microscopy fractured specimens were observed. 1-way ANOVA was used for statistical analysis and paired sample t-test for multiple comparison was applied using IBM-SPSS 20 (p<--0.05). Results: Groups in which zirconium oxide nanoparticles are added exhibited an increase in tensile strength i.e 1%NZ, 3%NZ, 7%NZ, 10%NZ and 12%NZ by 45.67MPa, 51.59MPa, 55.77MPa, 59.69MPa and 67.70MPa compared with that of control group 49,67MPa respectively. Conclusion: Zirconium oxide nanoparticles that are added to PMMA denture base material increases its tensile forte.
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