The Effect of CaSiO₃ Nano-Particles Reinforced Denture Polymethyl Methacrylate

Abstract

The preparation of CaSiO 3-PMMA nanocomposite denture matrix was reported. We investigated the optimal amount of CaSiO 3 nano-particles modified by silane coupling agent (Z-6030) on strengthen flexural strength and surface hardness (Knoop hardness) of the nano-CaSiO 3 /PMMA composite materials. The results indicated that the 1.5% CaSiO 3 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% CaSiO 3 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 CaSiO 3 nanoparticles in PMMA matrix, and the fracture surface of the 1.5% group is regular with obvious ductile dimple pattern demonstrating typical ductile fracture.

Water sorption and Solubility of Modified Heat Cured Acrylic Denture Base Material with Silver and Zirconia Nanoparticles

“…Recently, studies have investigated the effect of incorporating inorganic nanoparticles into PMMA to improve its properties (27)(28)(29) . The size, concentration, and interaction of these nanoparticles with a polymer matrix determine the properties of a polymer nanocomposite mixture (28) .…”

“…Nanomaterials are known for their superior characteristics compared to conventional ones (28,29) . When these nanomaterials are incorporated into a polymer matrix as fillers, hopeful features of both constituents could integrate to improve the properties of the polymer (29) .…”

Effects of nanobarium titanate on physical and mechanical properties of poly(methyl methacrylate) denture base nanocomposites

“…Most denture breakages occur inside the mouth during function, primarily because of flexural failure. 9 The denture base resin is subjected to various stresses during function; these include compressive, tensile, and shear stresses. Some of the factors responsible for denture fracture include stress intensification, increased ridge resorption leading to an unsupported denture base, deep incisal notching at the labial frena, sharp changes at the contours of the denture base, deep scratches, and induced processing stresses.…”

“…11 When inorganic nanoparticles function as fillers in polymer materials, the superior characteristics of both polymer materials and nanomaterials integrate to enhance rigidity, hardness, fracture toughness, and other functional properties of the composites. 9 However, nanoparticle loading also may result in decreased mechanical properties. 12 Sodagar et at.…”

“…11 Other attempts have been carried out to introduce new fillers for enhancing the properties of the dental polymer composites. Qian et al 9 evaluated the effect of nanocalcium silicate (CaSiO 3 ) on the flexural strength of PMMA. They concluded that the flexural strength of CaSiO 3 / PMMA nanocomposites increased when the amount of CaSiO 3 nanoparticles was increased from 0.5% to 1.5%.…”