Asking your dentist which product is compatible to you is the best way to get the right at-home teeth whitening product. Listen to the professional’s decision, and also research about the right ingredients your dental health needs for proper teeth whitening. For most people, the treatment will last for many years. Your teeth have become stained in the first place from consuming the foods and beverages. Upon the completion of your initial bleaching process, your teeth are restored to their natural white color. However, there are some cases where treatment may not be effective. Tooth lightening is ideal for patients who have healthy, unrestored teeth and would like a whiter, brighter smile.