The objective of this study was to evaluate the influence of silica (SiO2) micro-particles loading on the flexural properties of dental resin composites (DRCs). The DRCs were prepared from a resin matrix comprising Bis-phenol A-glycidyl methacrylate (Bis-GMA) as a base monomer and triethylene glycol dimethacrylate (TEGDMA) as a diluent monomer mixed with SiO2 micro-particles as a reinforcement filler in a ratio of 40, 50 and 60 wt%. The samples were then light-cured using a LED TPC 60. The density (g/cm3) of the DRC samples was determined according to the ASTM D792-98 standard. The values of flexural strength (FS) and flexural modulus (FM) were determined using the three-point bending test according to the ISO 4049:2009 standard. The results revealed that the density values of the DRCs increased as the SiO2 loading increased. The FS values decreased as the loading of the SiO2 increased from 84.52 to 53.2 MPa. In contrast, the FM values increased as the SiO2 loading was increased from 1.55 to 7.51 GPa. There were significant differences (p<0.05) in the values of FS and FM when the composites contained different amounts of SiO2 micro-particles. The SiO2 micro-particles used for reinforcement of the resin matrix had an effect on the flexural properties of the DRCs.

Author Name: Saad Omar Alsharif, Md Akil Hazizan, Arifin Ahmad Zainal

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Keywords: Flexural properties, Silica, Dental resin composites

ISSN: 2068-0783

EISSN: 2068-0783

EOI/DOI:

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