Generally, mouth guards cover your upper teeth only, but in some instances (such as if you wear braces or another fixed dental appliance on your lower jaw), your dentist will make a mouth guard ...

But these products also include ingredients, such as hydrogen peroxide in some, that whiten teeth. Manufacturers say it may take 12 weeks to see results. You just swish them around in your mouth ...

Teeth grinding, or bruxism ... Next, they bite down on the material, which molds to the shape of their mouth. Once the material sets, a person can trim away any extra. Price: Oral-B Nighttime ...

If you or someone you know grinds their teeth or clenches their jaw often ... team analyzed more than 35 custom fit night and mouth guards, factoring in features like cost, thickness, design ...

As a kid, Ryanne Jones' friend accidentally hit her in the mouth with a hammer, knocking out her two front teeth. Her parents never had enough money for the dental care needed to fix them ...