Does it hurt?
There may be some mild tingling, however the dentists at our practice road tested several bleaching systems and ZOOM 2 was found to be the easiest, least sensitive by far and most be comfortable (from the patient point of view) system.
Is it permanent?
Nothing is permanent, so a take home bleaching pack (for use every 3-4 months) is provided as part of the treatment, although extra tubes of bleach can be purchased as needed.
How long does it take?
The Zoom 2 system takes 45 minutes to 1 hour so bring a personal stereo (walkman, MP3) with you.