If you clench or grind your teeth while you sleep you should consider a night guard. The night guard provides a barrier between your top and bottom teeth while you sleep. All night guards are custom fitted for comfort and for proper breathing. Additionally, the dentist will design the night guard with a specific flat plane biting surface. This technique blocks the proprioception of the brain during the clenching process and puts your jaw at rest while you sleep. Your dentist will take an impression of your teeth and have the night guard created by a dental lab.