The enamel which reflects the natural color of your tooth can stain or dentin which is the inner surface of teeth stains and yellows the teeth. The causes of tooth discoloration are varied. Though many causes can be prevented yet there are some which are not in control. The causes of discoloration are:
The process of Teeth Whitening clears the stain and make your teeth look whiter. However, one should keep in mind that the results may vary from person to person.