Titanium dioxide nanoparticles on flexural strength of conventional and injection moulded denture base materials

The effect of anatase titanium dioxide nanoparticles on the flexural strength of poly-methyl-methacrylate (PMMA) resins comparing conventional and injection molding techniques is of interest. Hence, a total of 120 acrylic specimens were prepared and divided into control, 0.5% TiO₂ and 1% titanium dioxide groups. Flexural strength was measured using a three-point bend test and analyzed using variance test. The injection molded group showed superior flexural strength compared to the compression molded group with control specimens exhibiting the highest values. Increasing titanium dioxide concentration led to a significant reduction in flexural strength indicating a negative correlation between nanoparticle content and mechanical performance.