A filler synergistic toughening light-curig resin-based dental material: preparation, performance and biomechanical evaluation

doi:10.3969/j.issn.2095-4344.2017.10.003

Abstract

Abstract:

BACKGROUND: Light-curing composite resins have been applied in the dental repair due to its beautiful color, excellent physical and chemical properties and easy to operation. However, its insufficient mechanical properties tend to cause composite fractures, resulting in undesired clinical efficacy.
OBJECTIVE: To investigate the preparation, properties and biomechanical performances of filler-co-augmented photo-curable resin-based oral materials.
METHODS: The nano-silica surface-grafted with poly(methyl methacrylate) (PMMA) was obtained by atom transfer radical polymerization. Co-electrospinning was used to prepare the acrylonitrile/PMMA core-shell nanofibers, and a two-dimensional lactic acid-glycolic acid copolymer nanofiber membrane with a lattice structure was obtained using a copper mesh as a receiving device. The multi-scale and multi-dimensional packing was prepared by sol-precipitation method with silane coupling agent as a raw ethyl ester precursor, and further modified using silane coupling agent. The mechanical properties, volumetric shrinkage, toxicity, and degradation properties of the light-curing resin grafted with SiO2-PMMA were compared with those of the light-curing resin combined with trapezoidal polysiloxane materials grafted with methyl methacrylate.
RESULTS AND CONCLUSION: (1) Characterization of the composite resin under scanning electron microscope: the filler SiO2-PMMA core-shell nanofibers dispersed well in the light-curing resin matrix, in the presence of monodisperse phenomenon and less aggregation phenomenon. However, the trapezoidal polysiloxane material in the light-curing resin matrix dispersed unevenly, in the presence of reunion phenomenon. (2) The flexural strength, flexural modulus and fracture work of the light-curing resin grafted with SiO2-PMMA core-shell nanofibers were significantly higher than those of the trapezoidal polysiloxane-based light-curing resin (P < 0.05). (3) The volume shrinkage of the light-curing resin grafted with SiO2-PMMA core-shell nanofibers was lower than that of the trapezoidal polysiloxane-based light-curing resin (P < 0.05). (4) Compared with the trapezoidal polysiloxane-based light-curing resin, the water absorption and cytotoxicity (absorbance value) of the light-curing resin grafted with SiO2-PMMA core-shell nanofibers were significantly higher than those of the trapezoidal polysiloxane-based light-curing resin (P < 0.05), while the solubility of the light-curing resin grafted with SiO2-PMMA core-shell nanofibers was lower (P < 0.05). It is concluded that the prepared light-curing resin grafted with SiO2-PMMA core-shell nanofibers has excellent properties and biomechanical properties.

中国组织工程研究杂志出版内容重点：生物材料；骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性；组织工程

Key words: Biocompatible Materials, Mouth, Silicon Dioxide, Composite Resins, Biomechanics, Tissue Engineering

CLC Number:

R318

Luo Yi, Jiang Jun-qiang, Dan Hong-ping. A filler synergistic toughening light-curig resin-based dental material: preparation, performance and biomechanical evaluation[J]. Chinese Journal of Tissue Engineering Research, doi: 10.3969/j.issn.2095-4344.2017.10.003.

Figures/Tables 4

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