A: Depending on, among other things, smoking, consumption of coffee, tea or red wine, the process of discolourisation will continue after the treatment. How you clean your teeth also plays a part. In general, the result remains visible for many years. Only rarely does the treatment need to be repaeated after around five to seven years. What also is noticable,is that many people take greater care of their teeth after a Brite-Smile treatment. Many smokers even stop smoking. A special Brite-Smile toothpaste is also available. This toothpaste is very effective and leaves a layer on the enamel that stops dark colours, such as found in red wine, from attaching themselves to your teeth for a while.