There are actually two types of teeth whitening . One method is home bleaching which consists of a pair
of your dental trays and the bleaching gel. This type of whitening is time consuming and yields only one or
two shades of whitening effect. The other is clinical bleaching which will be done under supervision of
a dentist utilizing an accelerator to achieve the maximum of 8-14 shades of whitening effect without causing any permanent damages to the teeth.
A little tip is to have your teeth scaled and polished before your whitening to eliminate the external food or smoking stains.