Subliminal Stuff: Teeth Grinding

Sensitivity to heat and cold. Loosened teeth, fractures, and a debilitating headache. All this can occur while you sleep—from grinding your teeth. Dentistry calls it bruxism.

Talk about shell shock. Dentists see evidence of life in the fast lane everyday. As many as 90 percent of us grind our teeth each night, on the average of five episodes per evening. The bite force is so powerful—over 200 pounds per square inch—and the noise so fearful, you cannot physically duplicate this phenomenon when you're wide awake. While you're sleeping, a lot of damage is being done.

Bruxing seems to be associated with the REM stage of sleep, that never-never land where dreaming and rapid eye movement occur. There is some evidence that a bite out of alignment contributes to bruxing, but most agree stress is the problem. Or, even more alarming, the anticipation of stress.

Most people learn about a bruxing habit from the spouse who has to put up with it every night. More clues; waking up in the morning with jaw pain, jaw popping, jaw clicking, migraine or muscle fatigue and loose teeth.

Physical therapy, muscle relaxants and, sometimes, a custom dental appliance can help. But learning how to handle the stress in your life could salvage more than your teeth and help eliminate TMJ syndrome.

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