Opalescence Tooth Whitening System

Review: This product markets a 35% Carbamide-Peroxide bleaching gel. The 35% concentration is considered extremely strong in comparison to the concentrations available. Most at-home systems use a 10-15% concentration of Carbamide Peroxide.
Benefits: If you are looking for a great, fast-acting teeth whitening solution, Opalescence is the product.  Research shows that the 35% whitens as much as the 15%.  In addition, the 35% will get your teeth whiter faster, saving you some time.
Prescription: No
Consumer Reviews:

Fantastic!

The product is very strong so you just have to make sure that your teeth guards are cut away from your gums because they will burn a bit! (so I found out) Other than that, I kept the guard on for about 40 minutes and I am thrilled with the result!

Review from Amazon.com

Works Great!

This is the same stuff my dentist sells to his customers.

Just use as directed and you’ll see great results in no time at all.

Review from Amazon.com

Great Whitening Results But Not Worth the Pain!

I had my custom trays made by my dentist & was given the 15% Opelescence. It whitened and brightened my teeth after only 4 days but my teeth ached from the sensitivity for days on end! (I have always had sensitive teeth.) I couldn’t continue using the product. If you don’t have sensitive teeth, this is the best whitening gel on the market but you MUST get custom trays from your dentist that fit properly. A good tip is to store the gel in the refrigerator. It keeps the gel’s whitening concentration from depleting and the syringes will be good for at least a year.

Review from Amazon.com

Works, but burns…

This product is clearly superior with it’s 35% peroxide as opposed to drug store products which run about 15%.

However, without custom dental trays it can burn very badly. The first couple times i used this it was almost too painful to wear.

But, it can work without the custom trays. Here’s my advice: don’t use every day, this should be used every other day. Secondly, instead of applying the product to the trays and putting them in your mouth, apply the whitener directly to your teeth and put an un-moulded tray over so it doesn’t get on your upper lip. this worked well for me, the bleach still gets on my teeth and it doesn’t leak and burn the hell out of my gums.

Review from Amazon.com