Evaluation of Translucency, Chroma, Value in Some Commercial Dental Resin Composites

Optical properties of different resin composites may affect the correspondence between tooth color and its structure. Therefore، this study aimed to evaluate and compare the optical properties of 8 commercial composite resin materials with 1 and 2 mm thicknesses. 32 resin composite disks with 10 mm diameter and 1 and 2 mm thicknesses were prepared. Color parameters of the specimens were measured by Easy shade II/Vita device on black and white backgrounds. According to CIElab color scale، translucency parameter، chroma، and value of them were calculated and analyzed with two-way ANOVA and post hock Tukey tests. Translucency parameter and value on the white background decreased with increasing the specimen’s thickness from 1 to 2 mm، whereas value of different composites on black background and chroma on the both backgrounds revealed different behaviors. Increasing composite’s thickness can significantly affect its optical properties. Knowing the relative translucency of the different commercial materials can help dentists in the better choice of the proper composite for clinical use.