Zoom is a bleaching process widely used to lighten discoloration of enamel and dentin. Tooth discoloration may result from drinking coffee, tea, cola and red wine, or from smoking. The aging process also can stain and darken your teeth. The Zoom in-office tooth whitening procedure uses the Zoom Advanced Power Chairside Lamp – to accelerate the bleaching process – to activate the 25 percent hydrogen peroxide whitening gel. As the hydrogen peroxide is broken down, oxygen enters the enamel and dentin to bleach the stained substances, leaving the structure of the tooth unchanged.Read more about Zoom!