Professional teeth whitening is a permanent procedure. But it is most likely that your teeth will start to stain again naturally over time.  Practicing good dental hygiene like daily flossing and brushing and visiting your dentist for regular cleanings every six months can help to protect the health of your teeth and also prolong the results of the teeth whitening procedure. Dr. Sheena Gaur says that you can safely get your teeth whitened yearly to maintain the pearly color. However,  professional whitening more than twice a year is not required and can dry out your enamel, making the teeth sensitive and chalky looking.