Effect of zinc oxide nanoparticles on the flexural strength of polymethylmethacrylate denture base resin

Authors : Santhanam VIKRAM, N. Gopi CHANDER

Pages : 31-35

Doi:10.26650/eor.20200063

View : 12 | Download : 5

Publication Date : 2020-01-23

Article Type : Research Paper

Abstract :Purpose This study evaluated the flexural strength of polymethyl methacrylate insert ignore into journalissuearticles values(PMMA); reinforced with various concentrations of zinc oxide insert ignore into journalissuearticles values(Zn O); nanoparticles Materials and Methods Nano ZnO was added in 0, 0.4, 0.6, 0.8, 1.2 and 1.4 percentage to PMMA denture base material. 60 specimens of heat cure polymerizing acrylic resin of dimensions 10mm x 4mm x 80mm were fabricated in accordance to ISO 20795-1-2013. The specimens were divided into 6 groups. Acrylic specimens were processed according to manufacturer’s instruction. Three-point bending test was performed to evaluate the flexural strength. Surface analysis was performed with scanning electron microscopy insert ignore into journalissuearticles values(SEM); to observe the fracture surfaces of specimens. ANOVA and Tukey tests were used for the statistical analysis insert ignore into journalissuearticles values(p < 0.05);. Results Statistical analysis revealed significant differences in strength between groups. The flexural strength improved with the addition ZnO nanoparticles. Highest mean value was observed in Group nZn -14 insert ignore into journalissuearticles values(91.31 MPa); and lowest in control Group nZn-0 insert ignore into journalissuearticles values(61.36 MPa);. ANOVA and Tukey’s honestly significance test found statistical significant differences among the groups insert ignore into journalissuearticles values( p<0.001);. Conclusion The addition of ZnO nanoparticles in all concentrations increased the flexural strength of acrylic resin when compared to the control group.
Keywords : Flexural strength, heat cure acrylic, nano particles, poly methyl metha acrylate, zinc oxide