There are a variety of methods to keep the teeth clean and looking great and an option many people choose is teeth whitening. Before a Santa Monica California cosmetic dentist will assist with this procedure, it is important that a few steps are taken to make sure the mouth and teeth are in the right condition for whitening. An exam from a dentist is vital since engaging in a bout of teeth whitening while a cavity is present in the mouth can lead to significant complications. In addition, if gums are inflamed, it's best to hold off whitening the teeth until the mouth is healthy.