Abstract: Effective, non-invasive and non-destructive systems and methods provide an appearance of increased whiteness and/or brightness of the teeth, thereby enhancing the appearance of the teeth. One or more residual colors or dyes are applied to the surface of a tooth in order to complete the color spectrum of the tooth surface or more closely complete the color spectrum of the tooth surface, thereby enhancing the appearance of the tooth since a complete color spectrum appears as white. In one implementation, a residual color includes a shade of violet, wherein a red-violet reduces the yellow appearance of the tooth and a blue-violet enhances the brightness of the tooth. In one implementation, a bleaching step is performed to the surface of the tooth followed by the application of a residual color onto the surface of the tooth. In one implementation, a residual color includes a yellow shade applied to the surface of a tooth that otherwise appears gray to cause the tooth to appear whiter.

Abstract: A tooth whitening system that effectively conceals tooth discoloration within a short period of time. The system includes a single, spectrally pure, substantially violet dye and a carrier for applying the dye to teeth.