1) Office bleach:
In office bleach, a dentist applies tooth whitening solution on teeth. Then focuses LED light on the teeth. Depending upon the stains the tooth has, further sitting can be planned. This is the safest and most preferred way of tooth whitening.

2) Home bleach:
In home bleach technique a special tray is made and Patient has to wear the tray according to the instruction given by the dentist. Patient needs to apply the bleaching agent in the tray and wear it .Lighter stains can be effectively removed by this method, but in case of heavier stains this method is less effective.