For the last two decades, the ADA Council on Scientific Affairs has monitored the development and the increasing numbers of tooth whitening products. As the market for these products grew, the Association recognized a need for uniform definitions when discussing whiteners.
For example, “whitening” is any process that will make teeth appear whiter. This can be achieved in two ways. A product can bleach the tooth, which means that it actually changes the natural tooth color. Bleaching products contain peroxide(s) that help remove deep (intrinsic) and surface (extrinsic) stains. By contrast, non-bleaching whitening products contain agents that work by physical or chemical action to help remove surface stains only.
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