At home: the dentist takes impressions of the teeth and a pair of thin plastic trays are made, customised for each patient. The patient is then required to wear the trays for up to 2 hours per day for 14 days.  

In-office: this procedure involves the use of concentrated hydrogen peroxide gel on the teeth. The gel is activated by a whitening light, which allows the hydrogen peroxide to break down and enter the enamel, bleaching coloured substances, whilst the structure of the tooth remains unchanged. The patient may comfortably watch television during the procedure.