Comparative Evaluation of Compressive and Diametral Tensile Strength in Die Stone Reinforced With Different Types of Nanoparticles: An In Vitro Study

To investigate the effect of different types of nanoparticles on the compressive strength (CS) and diametral tensile strength (DTS) of type IV dental stones. A total of 100 specimens were made from the mould for all five groups. Four commercially available nanoparticles (aluminium oxide (Al O ), silicon dioxide (SiO ), zinc oxide (ZnO), and zirconium oxide (ZrO )) were used in this study in a concentration of 10%. CS and DTS tests were performed in a universal test machine. The data were statistically analysed using ANOVA and Student's t-test. The interaction between nanoparticles and the type of dental stone was found to be statistically significant (p < 0.05). CS and DTS values decreased by adding all four nanoparticles. The lowest CS and DTS were observed in 10% ZnO nanoparticles when added to type IV dental stone. It was concluded that the addition of nanoparticles (Al O , SiO , ZnO, and ZrO ) to die stone significantly decreased the CS and DTS for all groups. Among all groups, the incorporation of 10% ZrO nanoparticles (group E) to die stone showed significantly less decrease in CS and DTS compared to Al O , SiO , and ZnO. Incorporation of ZnO nanoparticles, on the other hand, showed a significantly more amount of decrease in the CS and DTS compared to Al O , SiO , and ZrO .