The Optical Behavior of Nano Filled Resin Composite Loaded With Graphene Oxide Nanoparticles

Abstract

Abstract Objectives Assessment of the effect of incorporation of graphene oxide nanoparticles (GONPs), different concentrations into resin composite with different thicknesses on its color modulation.Materials and methods GONPs were prepared with 0.05 wt.% and 0.2 wt.%. concentration. 10 mm diameter × 3mm height 70 nano-filled resin composite discs were prepared. 10 specimens of resin composite discs were prepared without GONPs incorporation and served as a control (G0). The other 60 specimens were divided into 2 equal groups (G1& G2) according to the concentration of the nanoparticles. Each group was divided into 3 equal subgroups according to the thickness of the resin composite containing GONPs; [T1: GONPs dispersed in the bottom 1 mm of the disc, T2: dispersed in the bottom 2 mm of the disc and T3: dispersed in the total thickness of the disc (3 mm)]. ∆E values were calculated using a Vita Easyshade Spectrophotometer.Results Incorporation of GONPs into resin composite induced significant color change and among the 6 experimental groups except for the G1T1 group showed a non-significant color change.Conclusion Dispersion of GONPs has a detectable effect on the color change of resin composite. Meanwhile, dispersion in low concentration for only the bottom 1mm thickness of resin composite has an undetectable effect on its color.