Carbamide peroxide with no expiration?

There are several options for whitening teeth or bleaching them and some methods are more effective than others. Some dentists opt for cosmetic contouring, using a bonding material to cover teeth. If your current family dentist isn't giving you the answers you were hoping for it doesn't hurt to ...

Hi:I would love to see the photos of the gums to see the exact swelling you are talking about.   Normally any gum burn due to whitening goes away in a few days. Best,Dr. Maddahi

The dark areas in between your teeth are either heavy staining, discoloration from decalcification or decay (cavities).   Your dentist should be able to give you an idea for treatment needs and cost.