Mouthguards:
A mouth guard (mouth protector) is a flexible custom fitted device worn over teeth during athletic activities to protect them from damage, and to minimize risk of broken teeth and injury inside the mouth.
A mouth guard is also recommended as a treatment for bruxism or grinding of teeth in sleep. You could have teeth that are painful or loose from severe grinding. This can lead to fractures in your teeth. A mouth guard is provided to protect your teeth during sleep.