The Effect of CaSiO3 Nano-Particles Reinforced Denture Polymethyl Methacrylate

Abstract

The preparation of CaSiO3–PMMA nanocomposite denture matrix was reported. We investigated the optimal amount of CaSiO3 nano-particles modified by silane coupling agent (Z-6030) on strengthen flexural strength and surface hardness (Knoop hardness) of the nano-CaSiO3/PMMA composite materials. The results indicated that the 1.5% CaSiO3 nano-particles could enable the nanocomposite to have the maximum flexural strength (90.50±4.86) MPa(increasing nearly 40% contrast to the blank group), while 2.0% CaSiO3 nano-particles made the nanocomposite to have a maximum Knoop hardness(24.59±0.98) MPa (augmenting with 24% compared with the blank group). Furthermore, the fracture surface was investigated by scanning electron microscope (SEM), which revealed that the silane coupling agent (Z-6030) affected the dispersion of the CaSiO3 nano-particles in PMMA matrix, and the fracture surface of the 1.5% group is regular with obvious ductile dimple pattern demonstrating typical ductile fracture.