A nightguard is a proactive step to protect your existing healthy teeth. They are clear, thin removable bite splints worn over your lower or upper teeth as you sleep. Studies suggest those who grind and clench their teeth may experience up to 80 times the normal tooth wear per day compared to those who do not. The good news is that a simple nightguard can offset the effects of this often-subconscious habit while protecting your teeth from daily wear and tear. They also help in relieving jaw pain consistent with TMJ problems.