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Bruxism (Teeth Grinding)




What Is It? Bruxism is clenching or grinding your teeth. Most people are not even aware that they are doing this. In the United States, bruxism affects about 30 million to 40 million children and adults.

Some people grind their teeth only during sleep. This is called "nocturnal bruxism" or "sleep-related bruxism." Others grind or clench their teeth during the daytime as well. This is thought to be related to stress or anxiety. Stress can occur for many reasons, including sad and painful events such as the death of a loved one or the loss of a job. It can also occur from joyous events such as a new job or the birth of a baby.

Bruxism can have a variety of causes. Some experts view bruxism as nothing more than a habit. It also can be a result of the body's reaction when the teeth do not line up or come together properly. Bruxism also can be a symptom of certain rare diseases of the nerves and muscles in the face. In rare cases, bruxism may be a side effect of some medicines that treat depression. These include Prozac (fluoxetine), Zoloft (sertraline) and Paxil (paroxetine).

People with severe bruxism can break dental fillings or damage their teeth. Rubbing the teeth together can cause the outer layers of enamel to wear away, exposing dentin. This can result in tooth sensitivity. Severe bruxism also has been blamed for:

Some cases of jaw dysfunction, also called temporomandibular disorders (TMD) Headaches when you wake up in the morningUnexplained facial pain

Symptoms You may be a bruxer if you experience any of the following:

Rhythmic contractions of the jaw muscles A grinding sound at night, which may disturb the sleep of someone who shares a bedroom with youA dull morning headache Jaw muscles that are tight or painful – This can make it uncomfortable, even painful, to open your mouth wide, especially in the morningLong-lasting pain in the faceDamaged teeth, broken dental fillings and injured gums Painful jaw jointSwelling (occasionally) on the side of your lower jaw caused by clenching. Chronic clenching exercises the jaw muscles. Like lifting weights, this makes the muscles grow larger. Once you stop clenching, the muscles will shrink and the swelling will go away.

Diagnosis If you experience any of these signs and symptoms, see your dentist. He or she can determine if you are a bruxer and how best to treat it.

Your dentist will ask about your general dental health, what sources of stress you have in your life, and what medicines you take. If you share your bedroom, the dentist also may want to talk to that person. The dentist will ask about your sleep habits, especially about any unusual grinding sounds heard during the night.

Your dentist will examine you, paying special attention to the muscles in and around your jaw. The dentist also will look at your teeth for evidence of grinding. During this examination, your dentist will check for tenderness in your jaw muscles and the jaw joint. He or she also will look for broken teeth, missing teeth and poor tooth alignment.

A more detailed exam may follow if your dentist suspects that your bruxism is related to dental problems. In addition to checking your "bite," (how your upper and lower teeth come together) the dentist will examine your teeth and gums for damage caused by bruxism. Your dentist might also take X-rays of your teeth and jaws.

About 30% of children grind or clench their teeth. The rate is highest in children under age 5. If your child grinds or clenches his or her teeth, discuss the problem with your family dentist. Most children eventually outgrow bruxism and suffer no permanent damage to their teeth.

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© 2018 THOMAS C. VOLCK D.D.S 

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