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Flexural strength and surface hardness in titanium nanoparticle-reinforced polymethyl methacrylate provisional
Nikhil K1, Ravi Kumar C1, Chalapathi Rao D1
1Department of Prosthodontics, Mamata Dental College, Khammam, Telangana, India.
Abstract:
Polymethyl methacrylate (PMMA) provisional materials often suffer from inadequate mechanical properties, particularly low flexural strength and surface hardness, limiting their durability. Therefore, it is of interest to investigate whether adding 3 wt% titanium dioxide (TiO2) nanoparticles could improve these properties in heat-cured PMMA resin. Hence, a total of 160 standardized specimens were tested for flexural strength and Vickers hardness using universal testing and micro-hardness methods. TiO2-reinforced PMMA showed a significant increase in flexural strength (56.62 ± 1.43 to 70.65 ± 8.32 MPa) and surface hardness (23.22 ± 1.30 to 26.74 ± 1.03 VH). Incorporating 3 wt% TiO2 notably enhances PMMA's mechanical performance, supporting its use in more demanding provisional applications.