In-office Teeth Whitening procedures are completely painless and produce great results by safely lightening stains on the surface of the tooth which gives them a whiter appearance. In-office teeth whitening is fast, effective, safe and produces a dramatically whiter smile than before. In-office whitening is one of, if not the, most popular cosmetic dental procedure in the world. It produces immediate results, as opposed to at-home whitening, and is professionally performed. The advantages of in-office whitening are numerous such as producing the fastest results, gum and tooth sensitivity are more controllable and its also the safest form of bleaching there is.