When we speak about the different techniques of teeth bleaching, it refers to teeth whitening procedure. These teeth whitening procedures may include chemical whitening, mild acid whitening, abrasive teeth whitening and laser teeth whitening. When you choose a teeth whitening procedure to be done by a dentist, you will have to take time off work to schedule several appointments and this is quite costly. A cheaper teeth whitening procedure is performed at home under dentist supervision with the application of the whitening gel in the mouth trays, but this means that the patient has to wear the mouth trays for several hours and often all night long. Another option for a teeth whitening procedure is a teeth whitening kit that is cheaper as compared to the professional teeth whitening procedure done or supervised by a dentist himself without much of your effort.