Aims &objectives: To evaluate and compare the surface hardness (Vickers hardness) and residual monomer content leached out from nano Alumina reinforced heat cure acrylic specimens (i.e, 0%, 2%, 3%, 5% and 7%by weight).
Materials & methods: A total number of 100 heat cure PMMA acrylic resin samples reinforced with different concentrations of nano alumina particles (0%, 2%, 3%, 5% and 7% by weight) were prepared. Among them 50 samples were intended for Vickers surface hardness evaluation by digital microhardness testing machine (METSUZAWA)and they were categorized as Group A, B, C, D & E and the remaining 50 samples were intended for residual monomer analysis by UV-double beam spectrophotometer (SYSTRONICS-2201)and categorized as Group F, G, H, I, & J while Group A and Group F containing 0% wt. nano alumina were considered as controls
Results: The results of the present in vitro study were tabulated and subjected to statistical analysis using one- way, NOVA to know the significant difference between these parameters and Post Hoc test for multiple comparisons of mean differences.
Conclusion: Better surface hardness values are more for higher concentrations compared to lower concentrations of nano alumina particles where as highest mean value of residual monomer content (0.1%) was found in control group-F and least mean value (0.06%) was found in Group-H (i.e., contains 3%wt.nano alumina). The acrylic specimens reinforced with 3% wt of Nano Alumina particles has showed less residual monomer content and moderate surface hardness values compared with other groups
Impact Factor
2022: 6.012
This work is licensed under a