Influence of Color and Size of a Cylindrical Cavity on Composite Resin Color

Abstract

The recent growth of aesthetic demand among patients and the concept of Minimal Intervention (MI) have begun to attract attention to the use of composite resin for restoration after minimum grinding. This has also made composite resin popular for aesthetic restoration. For high-grade aesthetic restoration to resemble a natural tooth enough to satisfy a patient, the tone should be selected in consideration of the influence of the ambient color on the composite resin. Composite resin is a semitransparent material known to be subject to the influence of the background color. Therefore, investigation into the tone of composite resin filled into cavities of various conditions is important for understanding tonal harmony between the composite resin and the natural tooth. In this study, we conducted an experiment to investigate the influence of the color and size of a cylindrical cavity on the composite resin used for restoration. Considering white and black cylindrical cavities of different diameters and depths as standard cavities, we measured the colors of three types of composite resin in order to investigate the influence of the cylindrical cavity size and the cavity wall color on the color of the composite resin. In conclusion: 1. The color of composite resin used to repair a cylindrical cavity is subject to both the influence of the cavity wall color and the cavity form. 2. The influence of the cavity floor and wall colors on composite resin color varies with cavity size and depth. 3. Consideration of the influence of the cavity walls and cavity form is necessary when selecting the color of composite resin for restoration.