This is not for the weak and weary. It does however work very well! One must be motivated to go through with this if you have sore or sensitive gums, it can be painful. Well worth it, tho!
It takes a few treatments under a light in the dental office and home care where you sleep with dental plastics ( molding ) in your mouth all night for two weeks or so, I can't exactly remember. The dentist gave me some numbing q-tips and they worked well. Also, he told me to put some vaseline on my gums as they were reacting in a rather painful way...not everyone has this pain but I did.
I was preparing for veneers, so the dentist wanted my teeth as white as possible. The back sides were in need of whitenng as well.
I am SOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO happy I did this procedure and I am so happy I went to this particular, wonderful dentist.