<div id="tmessagedisplay">Hi,
there are two types of professional teeth bleaching procedures: take-home whitening that involves a kit provided by your dentist and an in-office bleeching (aka Zoom) that takes minimum 3 hours to do and gives you immediate results.
For take-home bleeching kit, your dentist would have to take impressions of your teeth (about 20 min) and send it to the lab to make a tray (takes about 1 week); during your next visit, you will pick up the tray, a bleeching gel and instructions. You would have to use in the gel for 1-2 weeks (although one week is usually enough to strat seeing the results).
Zoom bleaching is done in the office and takes 3 hours.
With both methods your teeth will get 3-4 shades whiter after the treatment is completed.
If you are in Los Angeles area, visit Dr. Roya Levi located in Santa Monica for the Spring 2012 Special on teeth whitening:
http://www.royalevidds.com/blog/post/teeth-whitening-by-a-dentist-in-la.html</div>