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<p>This study investigates the effect of polymer-grafted silica nanoparticles on the performance of light-curable dental nanocomposite resins. Poly(methyl methacrylate) (PMMA)-grafted SiO<sub>2</sub> (PMMA–SiO<sub>2</sub>) organic–inorganic hybrid nanospheres were synthesized by emulsion polymerization using 3-(trimethoxysilyl)propyl methacrylate (MPS)-silanized SiO<sub>2</sub> as the substrate and methyl methacrylate (MMA) as the monomer. Successful grafting was confirmed by Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). Orthogonal experiments, in which methyl methacrylate (MMA) and silicon oxide were key variables, were conducted to determine the optimal mass ratio, temperature, and time. Subsequently, 65 wt% PMMA-SiO<sub>2</sub> nanospheres were added to Bis-GMA(bisphenol A glycidyl methacrylate)/TEGDMA(triethylene glycol dimethacrylate) (70/30 by wt%) resins through a photocuring process. Scanning electron microscopy (SEM) images displayed a relatively unclear interface between the inorganic fillers and the resins in the composite. The PMMA-SiO<sub>2</sub>/Bis-GMA composite resin had the highest flexural strength and the lowest solubility after 1 week of water storage at 37℃. Using these methods, composite resins containing 15 wt% MPS-SiO<sub>2</sub> nanospheres in a Bis-GMA/TEGDMA (70/30 by wt%) mixture showed the best overall properties. A comparison with several commercial resins revealed competitive mechanical properties and favorable water sorption/solubility characteristics.</p>

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Synthesis and improvement in the properties of a composite dental resin modified by addition of nanoparticle silica grafted with poly(methyl methacrylate)

  • 期刊论文

  • 发表日期：

    2026年6月18日

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  • Shao-hua Luo,
  • Jiahang Yu,
  • Xiaolong Li,
  • Siying Zhou,
  • Shengxue Yan,
  • Ding Wang,
  • Shubin Sun,
  • Jianguang Chen,
  • Zhijie Chen

摘要

This study investigates the effect of polymer-grafted silica nanoparticles on the performance of light-curable dental nanocomposite resins. Poly(methyl methacrylate) (PMMA)-grafted SiO2 (PMMA–SiO2) organic–inorganic hybrid nanospheres were synthesized by emulsion polymerization using 3-(trimethoxysilyl)propyl methacrylate (MPS)-silanized SiO2 as the substrate and methyl methacrylate (MMA) as the monomer. Successful grafting was confirmed by Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). Orthogonal experiments, in which methyl methacrylate (MMA) and silicon oxide were key variables, were conducted to determine the optimal mass ratio, temperature, and time. Subsequently, 65 wt% PMMA-SiO2 nanospheres were added to Bis-GMA(bisphenol A glycidyl methacrylate)/TEGDMA(triethylene glycol dimethacrylate) (70/30 by wt%) resins through a photocuring process. Scanning electron microscopy (SEM) images displayed a relatively unclear interface between the inorganic fillers and the resins in the composite. The PMMA-SiO2/Bis-GMA composite resin had the highest flexural strength and the lowest solubility after 1 week of water storage at 37℃. Using these methods, composite resins containing 15 wt% MPS-SiO2 nanospheres in a Bis-GMA/TEGDMA (70/30 by wt%) mixture showed the best overall properties. A comparison with several commercial resins revealed competitive mechanical properties and favorable water sorption/solubility characteristics.