Tooth whitening lightens teeth and helps to remove stains and discoloration. Whitening is among the most popular cosmetic dental procedures because it can greatly improve how your teeth look. Whitening is not a one-time procedure. It will need to be repeated from time to time if you want to maintain the brighter color.
Every day, a thin coating (pellicle) forms on the enamel and picks up stains. Tooth enamel also contains pores that can hold stains. The most common reasons for teeth to get yellow or stained are : Using tobacco, Drinking dark-colored liquids such as coffee, cola, tea and red wine, Not taking good care of your teeth. Aging also makes teeth less bright as the enamel gets thinner and the dentin becomes darker.
There are two main types of whitening procedures. Non-vital whitening is done on a tooth that has had root-canal treatment and no longer has a live nerve. Vital whitening is performed on teeth that have live nerves.