A night guard doesn’t necessarily stop you from grinding your teeth. In fact, researchers admit there is no known way to stop your brain from clenching and grinding your jaw since you cannot control movements in your sleep. So, the next best thing you can do is protect your teeth from damages by shielding them with a night guard. This provides a barrier between your lower and upper teeth and puts some space in between the two. That way, you wear down the guard instead of your natural tooth enamel.