An overview of bleaching techniques: I. History, chemistry, safety and legal aspects.

The use of a variety of bleaching techniques has attracted much interest from the profession, as they are non-invasive and relatively simple to carry out. Coupled with the uncertain legal situation within the European community, and especially within the UK, this series of articles hopes to give a broad overview of bleaching techniques, their efficacy and relative safety, as well as update the current legal situation. This article will give an overview of bleaching: history, chemistry and safety. In addition, it will summarize types of tooth discoloration, along with indications/contra-indications for bleaching. Future articles will address in detail both home and power bleaching techniques, as well as the various ways to bleach non-vital teeth.