“…23 The optical properties of restorative materials are significantly influenced by the material structure [24][25][26][27] and thickness. 24,25,[27][28][29][30] In addition, several studies have examined the factors that can affect the optical properties of dental restorative materials, including shade, 25,31 manufacturing technique, 22,26 luting agent, 30,32,33 background shade, 34,35 surface texture, 36,37 and illuminants. 24,38 This study aimed to evaluate the translucency and opalescence of current monolithic CAD-CAM restorative materials with different chemical compositions and thicknesses.…”