Comparative Evaluation of the Flexural Strength and Antimicrobial Properties of Heat Cure Denture Base Resins by Addition of TiO2 and Methacrylic Acid: An in-Vitro Study.

Aim: To evaluate and compare the flexural strength and antimicrobial properties of heat cure denture base resins by addition of TiO2 nanoparticles and methacrylic acid at different concentration.Specimens were prepared. These specimens were stored at 37 ̊C in distilled water for 1 day. Specimens were incubated in BHI broth containing S. aureus and C. albicans in different test tubes at 37 ̊C for 18 hrs before the evaluation of microorganism adhesion and flexural strength. CFUs were evaluated of C. albicans and S. aureus when incubated at 37 ̊C on blood agar. Flexural test was measured by using universal testing machine at speed of 5mm/min. Data were subjected to static analysis (ANOVA, Tukey’s HSD test).Results: Reduction in CFU counts of S. aureus and C. aureus were found more significant for group IV as compared to group I and there was non-significant reduction in flexural strength in group II. Other groups showed significant reduction when compared to control group. Conclusion: Group IV had better antimicrobial property and acceptable flexural strength hence this information can be used clinically as per patient requirement. Key words: Antimicrobial property, flexural strength, TiO2NPs, MAA, PMM