Color interaction of dental materials: Blending effect of layered composites

Influences of filler content and size on the color adjustment potential of nonlayered resin composites

“…This model focused on the influences of the filler content and filler size on the BE as has been suggested as an area for future research in previous studies, such as that by Paravina et al 4) . This study did not show a statistical trend of BE value based on particle size difference, but found that filler content was statistically significant to the BE.…”

“…According to previous research, the blending effect increases as two similar colors become closer, and the blending effect is affected by the type of composite resin and its tone 4,5) . The BE increases especially with smaller restoration size, less color difference, and bigger translucency 4) , and the blending effect is highly relevant to the layered effect 5) . The BE plays an important role in achieving highquality esthetic restorations with the standardized colors of composite resin 6) .…”

“…The quantitative measurements of the change in BE were assessed according to filler contents and filler sizes as suggested in previous research 4) . We also scrutinized whether the translucency parameter (TP) is actually affected by the filler content and filler size and studied the relation between TP and BE.…”

Influence of enamel prism orientations on color shifting at the border of resin composite restorations

“…The order of the DF value (diffusion transmission property), the G0 value (straight-line transmission property) and the area value (whole amount of transmitted light) of the resin composites used in this study was inconsistent with the order of the L* and C* color shifting rate of those in this study, therefore it was unclear how each of the light transmission characteristics could influence the L* and C* color shifting rate at the border of resin composite restorations in this study. On the other hand, ANOVA revealed that the materials did not significantly affect the L* color shifting range in both cavity size groups (p=0.137 and 0.079, respectively), and significantly affected the C* color shifting range in the 3 mm cavity size group (p=0.002) but not in the 1 mm cavity size 8 Dent Mater J 2018; : -group (p=0.068). Presumably, the color shifting effects of the resin composite restoration at the border might be influenced by each element in the light transmission characteristics of resin composite and also by the cavity size with the amount of filled resin composite.…”

“…Paravina et al evaluated the color change of resin composites when placed in a mold made of another color of resin composite which mimicked dental hard tissue. They indicated that the color shifting effect increases with an increase in the translucency parameter, and with a reduction in the size of restoration and the initial color difference between the inner and outer resin composites moreover, it was dependent upon the kind of resin composite and its shade [8][9][10] . Optical properties are intrinsic properties resulting from a combination of various factors, such as specular and diffuse reflection (light scattering) at the surface, specular transmission of light through the tissue, and absorption and scattering of light within the tissue 4,11) .…”