Dental Whitening can be a very effective way of lightening the natural color of the teeth without removing any of the tooth surfaces. Teeth Whitening is a process, which largely helps in lightening teeth and helps to remove stains and discoloration. Whitening is among the most popular cosmetic dental procedure because it can improve how the teeth look. There are umpteen reasons why you might need to undergo teeth whitening procedure. Teeth whitening treatment consist of two types of procedures namely vital whitening and non-vital whitening. While vital whitening is performed on teeth that have live nerves, non-vital whitening is done on a tooth that has had root-canal treatment and no longer has a live nerve. First, the Dentist will put a rubber shield or a gel on the gums to protect the teeth and then will apply the whitening product to the teeth, usually a specially made tray that fits into the mouth like a mouth guard. Teeth Whitening, also known as Teeth Bleaching when utilizing bleach, is essentially a restoration of natural tooth shade or whitening beyond natural shade. Teeth whitening are not a one-time procedure, and require multiple visits to the Dentist. It is usually done within three to four weeks. Also, teeth whitening will need to be repeated from time to time in order to maintain the brighter color.