Color Matching of a Single Shade Structurally Colored Universal Resin Composite with the Surrounding Hard Dental Tissues

Abstract

Color matching between the resin composite and the teeth is the most aimed target by the patient to evaluate the quality of the treatment. The aim was to investigate the ability of the uni-shade restorative material to match the tooth shade and the blending effect of the single shade structurally colored universal resin composite. Materials and methods disc shaped specimen (6×2 mm) were prepared from Omnichroma® single shade resin composite. Color shade was recorded for 10 freshly extracted premolars by Easyshade® according to CIE Lab system. Standardized class V cavities (4×2×1.5 mm) were prepared on the buccal surface of each tooth away 0.5mm from the CEJ. Cavities were then restored with resin composite, cured for 40s, and their color was recorded after 24 hours storage in distal water. Two tests have been done, the first was to determine the differences of the color parameters between disc and resin composite in teeth (T1). The second was to record the change in color between the sound teeth and the resin composite in teeth (T2). The color change data statistically analyzed using paired t-test. It was considered statistically significant at(a=0.05). Results All color parameters in the two tests showed significant changes except (ΔL) in T2 which showed nonsignificant differences. The specimens showed decrease in lightness and showed shifting toward the green and yellow direction, while in T2 they became lighter than the teeth and directed toward the green and blue scale. Conclusion OMNICHROMA single shade resin composite matches the shade of enamel.