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Some patients react to stress by grinding their teeth unconsciously during the day or, more commonly, while sleeping. Other causes may include anxiety, misaligned teeth, posture and diet. The constant pressure and motion can harm teeth, as well as muscles in and around the jaw and may contribute to TMJ dysfunction. The condition, known as bruxism, can be remedied with a nightguard. Common symptoms of bruxism are chipped teeth, cracked fillings, excessive tooth wear, sore jaw, headaches and earaches.

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