Abstract
Abstract Aim: The study aimed to assess and investigate the effect of electron beam irradiation on the flexural strength of two newer nanocomposites (Filtek Z350XT and Filtek Bulkfill) Materials and Methods: Forty samples each of both the nanocomposites were prepared on rectangular bar shaped moulds (25*2*2mm) according to ISO 4049. The dosage of electron beam selected for the study were 2KGy, 4KGy and 10KGy. The forty specimens were divided into four groups based on the radiation doses; group I: non radiated, group II: 2KGy , group II: 4 KGy, group II: 10KGy with ten samples in each group. The samples were subjected to a 3point bend test on a universal uniaxial servo mechanical testing machine. Results: The data was statistically analyzed using One way Anova analysis. Analysis demonstrated that Filtek Z350XT had better flexural strength than Filtek Bulkfill (P<0.001). The flexural strength of the composites increased with the dose of electron beam irradiation. Conclusion: Within the limitations of the study, it can be concluded that the electron beam irradiation of the nanocomposites can be used as a tool to enhance their mechanical properties.
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