Talk to your dentist about maintaining the colour of your teeth, and the products that are available for keeping the effect. Each individual’s lifestyle needs to be assessed but good oral hygiene and regular visits to the hygienist will help to maintain the effect for longer.
Some people find that their teeth are sensitive for the first few days after treatment, but this wears off after a short while. Your dentist will advise you of the products you can use to counteract this.