Night Plaque (For Bruxism) Mouth Guard Although teeth grinding can be caused by stress andanxiety, it often occurs duringsleepand is more likely caused by an abnormal bite or missing orcrooked teeth. Because grinding often occurs during sleep, most people are unaware that they grind their teeth. However, a dull, constantheadacheor sore jaw is a telltale symptom of bruxism. Many times people learn that they grind their teeth by their loved one who hears the grinding at night. If you suspect you may be grinding your teeth, talk to your dentist. The dentist can examine your mouth and jaw for signs of bruxism, such as jaw tenderness and abnormalities in your teeth. In some cases, chronic teeth grinding can result in a fracturing, loosening, or loss of teeth. The chronic grinding may wear their teeth down to stumps. When these events happen,bridges,crowns,root canals,implants, partial dentures, and even completedenturesmay be needed....