For some people, stress can trigger frequent clenching of the jaw or grinding of the teeth. This severe amount of pressure on your teeth can cause micro fractures within the teeth. Micro fractures are weakened areas in your teeth that put them at risk for further damage. Jaw clenching or tooth grinding can also damage dental work. If you’re one of the many people that grind or clench your teeth, a custom mouth guard to help you stop from wearing down your pearly whites.