Factors affecting the process of color matching restorative materials to natural teeth.

Resin-based restorative materials have to not only function properly but also fulfill esthetic demands; restorations must harmonize in shape and shade with natural teeth. The human perception of color is affected by external factors. The influence of these factors is discussed in regard to two pairs of composite resins: Silux/Valux and Pekalux/Pekafill. With the knowledge of the influence of these factors and with the accuracy of modern color measurement instruments, it is today possible to carry out restorative work to meet the highest esthetic standards.