How a Nightguard Protects Your Teeth from Grinding If you wake up with a dull headache, a sore jaw, or teeth that feel unusually sensitive to your morning coffee, you are likely part of a massive club. In the high-stress environment of Silicon Valley, sleep bruxism, the medical term for grinding or clenching your teeth at night, is incredibly common. For those experiencing nighttime grinding, a custom nightguard in Sunnyvale, CA can help protect teeth ...