The amount of time between dental whitenings can vary from person to person. There might be some scenarios where you might want to go back every three months and then there are others that could point to every two years. It depends on how well you take care of your teeth in between appointments – are you brushing properly and avoiding foods and drinks that can stain them. The best thing to do is talk with your dentist about your habits and your own preferences. That way, you can work out a schedule for you to come in for visits. Of course, you still want to see them every six months for regular cleanings.