Comparative Evaluation of Nanocomposite and Microhybrid Composite Resins Compressive Strength (An In Vitro Study(

Abstract

The aims of this in vitro study is to evaluate and compare compressive strength of newer nanocomposites (FiltekZ350, Ceram X Mono,Herculite XRV Ultra) with microhybrid (FiltekZ250) and to assess difference in compressive strength of newer nanocomposites.Materials and Methods: Forty specimens of composite were made using plastic mold measuring 5mm x 5mm and were grouped with ten specimens in each ,Group I: Filtek Z 250, Group II: Filtek Z 350, Group III: Herculite XRV Ultra, Group IV: Ceram X Mono. Composite resins are placed in cylindrical plastic mold and covered with celluloid strip and were cured by light curing device. Compressive strength was recorded using universal testing machine. Results are statistically analyzed using one way ANOVA and LSD test.Results: Nanocomposites have better compressive strength value than microhybrid composite but they are not significantly different and not all of nanocomposites used were higher than microcomposite.Conclusion: Nanocomposites (Filtek Z 350) have comparable compressive strength with microhybrid composite resins (Filtek Z 250) in which using both of them is indicated in anterior and also posterior areas where the functional loading is higher and need super mechanical properties to withstand these forces. While other nanocomposite groups (Herculite XRV Ultra, Ceram X Mono) used in this study have lower compressive strength than others groups.