Aim: To investigate the effect of different types of nanoparticles on the compressive strength (CS) and diametral tensile strength (DTS) of type IV dental stones.
Materials and methods: A total of 100 specimens were made from the mould for all five groups. Four commercially available nanoparticles (aluminium oxide (Al
2
O
3
), silicon dioxide (SiO
2
), zinc oxide (ZnO), and zirconium oxide (ZrO
2
)) 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.
Results: 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.
Conclusion: It was concluded that the addition of nanoparticles (Al
2
O
3
, SiO
2
, ZnO, and ZrO
2
) to die stone significantly decreased the CS and DTS for all groups. Among all groups, the incorporation of 10% ZrO
2
nanoparticles (group E) to die stone showed significantly less decrease in CS and DTS compared to Al
2
O
3
, SiO
2
, 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
2
O
3
, SiO
2
, and ZrO
2
.