The bleaching of teeth is between the current progress in cosmetics. Precise techniques help to restore the color to white teeth and the brightness of a time: you can even get to get a white un po ‘."Unnatural", such as porcelain, totally devoid of colore.Denti shades of white as porcelain does not exist in nature, the color of teeth is personal, un po ‘as the color of skin, each has its own. The "white natural teeth incorporates slight nuances on the tones of yellow and gray, sometimes of brown or reddish, more or less pronounced, increasing the intensity of freeboard at the top of each gingival tooth. The dog, among others, have usually a color load of isolation. The opposite of what you might think the enamel is not determining the color of teeth. It does not have a right color, is translucent from its surface reveals the color of the underlying dentin. Over time, however, can stain the enamel pigments by absorbing food and beverages, while the dentine tends to thicken for affixing continues in the inner chamber in the crown of the teeth. This means that with the aging teeth are darker and lose their original luster.