Assessing Fracture Toughness and Impact Strength of PMMA Reinforced with Nano-Particles and Fibre as Advanced Denture Base Materials

Statement of Problem: Polymethyl methacrylate (PMMA) denture resins commonly fracture as a result the being dropped or when in use due to heavy occlusal forces. Purpose: To investigate effects E-glass fibre, ZrO2 and TiO2 nanoparticles at different concentrations on toughness impact strength PMMA base. Materials Methods: evaluate (dimensions: 40 × 8 4 mm3; n = 10/group) 80 10 12/group), 286 rectangular tested specimens were prepared divided into four groups. Group C consisted without any filler (control group), while remaining three groups varied according concentration materials by weight resin: 1.5%, 3%, 5%, 7%. Three-point bending Charpy tests conducted measure respectively. Scanning Electron Microscope (SEM) was utilised examine fractured surfaces after test. One-way analysis variance (ANOVA) followed Tukey post-hoc employed analyse results p ≤ 0.05 significance level. Results: Fracture with 1.5 3 wt.% ZrO2, TiO2, all fibre significantly higher (p < 0.05) than control group. The samples reinforced exhibited highest toughness. Those wt.%, 5 7 fibres had heat-cured modified either did not exhibit statistically significant difference > comparison Conclusions: ZrO2; ratios TiO2; can effectively enhance PMMA. inclusion does improve strength, not.