Teeth grinding can occur during sleep (called sleep bruxism) and while awake (awake bruxism).Teeth grinding eventually wears down and damages teeth. The damage is often worse in people who have gastroesophageal reflux disease Gastroesophageal Reflux Disease (GERD) In gastroesophageal reflux disease, stomach contents, including acid and bile, flow backward from the stomach into the esophagus, causing inflammation in the esophagus and pain in the bottom... read more 
(GERD) and/or obstructive sleep apnea Sleep Apnea Sleep apnea is a serious disorder in which breathing repeatedly stops long enough to disrupt sleep and often temporarily decrease the amount of oxygen and increase the amount of carbon dioxide... read more 
. Artificial dental crowns (made of gold, porcelain, or both) can be fractured, perforated, and damaged, although if porcelain is on the chewing surface, the opposing tooth may be the one that wears. Some people also develop headaches and neck and/or jaw pain because of the repeated muscle tightening.
People who grind and clench their teeth usually do not do so intentionally. The clenching is unconscious and is usually most severe during sleep. Even though they are asleep, people may clench down with a force of up to 250 pounds (1,700 kilopascals) because there is no active protective feedback mechanism. People may not be aware that they clench their teeth, but family members often notice.
Treatment of Teeth Grinding
While awake, avoidance of grinding the teeth and sometimes use of guards
While asleep, wearing of night guards
While awake, people must consciously try not to clench their teeth. While sleeping, they can wear plastic oral appliances (night guards) that fit between the teeth. The night guards prevent the teeth from grinding together. People with severe teeth grinding and clenching may also need to wear the guards during the day, both to protect the teeth and to remind the person to not clench the teeth. Usually, these appliances are made by a dentist and adjusted to the person's needs. For some people, such as those whose only problem is tooth wear, dentists may recommend use of an over-the-counter guard that can be heat-molded at home (like tooth guards for athletes). People should have a dental evaluation before using such devices.
More Information
The following is an English-language resource that may be useful. Please note that THE MANUAL is not responsible for the content of this resource.
MouthHealthy.org: This general resource provides information on oral health, including nutrition and guidance on selecting products that carry the American Dental Association's seal of approval. There is also advice on finding a dentist and how and when to see one.
