It depends a lot on the type of staining presented by the teeth. The whitening treatment does not change the colour of the teeth; it only lightens it, being akin to an internal cleaning. The enamel is porous and substances are deposited on these pores throughout one’s life that “dirty” the tooth: coffee, tobacco, tea, saffron, bacterial plaque… The more substances of this type on the teeth, the lighter we will be able to get them.
Dra. Gema Olmos