Getting enough sleep each night is one of the pillars of good health. But for up to 70 million people in the United States, sleep doesn't come so easily, according to the National Heart, Lung, and Blood Institute . Insomnia is the most common sleep disorder, but there are more than 80 types out there. And some you might not even realize you have unless someone else points them out.

Your partner might notice signs of a sleep disorder, but your dentist could spot one, too. The National Institute of Dental and Craniofacial Research says flattened or chipped teeth could be a sign of sleep bruxism, which means you're grinding your teeth at night. Bruxism can also wear down your tooth enamel or make your teeth more sensitive. Your dentist might also check if your jaw feels sore or tight.

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