Somewhat like plaque candy and the paint on (overnight) tooth whiteners; we add a temporary color that binds to the tooth enamel and instead of tooth paint or coloring only part of the tooth, we color the whole tooth and we only need to wait until it wears off. I think that with white teeth as a back ground for any specific color that it would be spectacular to have a brilliant color from anywhere on the spectrum bordering on neon colors. We could match or contrast toung colors. Very pretty and very novel!
Reward: Some in all colors!