Zoom is a bleaching process widely used around the world to lighten discoloration of enamel and dentin which may result from drinking coffee, tea, cola and red wine; or from smoking or simply aging. The Zoom in-office tooth whitening procedure uses the Zoom Advanced Power Chair-side Lamp – said to accelerate the bleaching process – to activate the 25 percent hydrogen peroxide whitening. 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.