As we've said before, dentist-prescribed tray whitening is generally less expensive than in-office light-activated procedures and like Zoom Whitening Cost runs around $350 - $600 (or more for hard-to-treat cases) based on a national average. Do-it-yourself kits can cost as little $15.00 and run as high as $120. But again, almost any company from any country can manufacture and sell tooth whitening products - do some research and ask some questions before you decide about a specific kit's value.
With a little careful thought and a good plan, you don't have to spend a fortune to get the smile you've always wanted. That's the reason TeethWhiteningReviews.com is here to help you. We love to see you smile.
From : http://www.teethwhiteningreviews.com/artman/publish/all-about-teeth-whitening-trays.php