Our teeth are constantly under physical stress that can cause side effects and anti-esthetic including opacity and dark spots up to a real yellowing of the teeth. If you have white teeth is certainly a very common desire, to succeed in this undertaking is not so easy, partly because the color of the teeth was due tint to the enamel, determined by a genetic component, and partly by the presence of any stains color formers . Derived from dietary habits or lifestyles that cause pigmentation of the surface of the teeth (smoking, excessive intake of coffee, tea, wine …).