During one's lifetime, their teeth get stained and the whole reason why this happens is because the enamel has been eroded over time
. The erosion of the enamel means that its original color is gone along with the bits and pieces that crack off. Teeth whitening helps to have the original color of the enamel back to its original shade or even better by simply indulging in a very effective process of teeth whitening. Therefore the enamel can be restored and replenished through teeth whitening.