The light transmittance values of the paint-on resins ranged from 60.3% to 88.3% at 100 μm thickness, which were lower or nearly equal in comparison with the crown and bridge resin and enamel. The color values and the color differences among thicknesses of specimens were also determined. The light transmittances including its wavelength distribution and diffusion characteristics were measured. Specimens with four different thicknesses (75-150 μm) were prepared. Three shades of paint-on resin, one crown and bridge resin, and human enamel were used. The paint-on resin may be an effective material for the modification of the color appearance matching required.Ībstract = "The purpose of this study was to examine the light transmittance characteristics of the paint-on resins for shade modification. The thin layer of paint-on resin effectively changed the color of restorative resin. Although differences in the wavelength distribution of transmittance among materials were found at lower wavelengths, all materials showed similar diffusion characteristics. The purpose of this study was to examine the light transmittance characteristics of the paint-on resins for shade modification.
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