Temporomandibular joint disorder, abbreviated as "TMJ" disease, is a painful condition that affects the joint connecting the jawbone to the skull. TMJ may also involve the surrounding muscles and soft tissues.
Temporomandibular joint disorders are poorly understood. They are thought to involve a disturbance of the joint that connects the back of the jaw to the skull. This joint is located just in front of the ear and can be felt when the jaw opens and closes.
Temporomandibular joint disorders may cause a wide variety of complaints, such as: a clicking or snapping noise heard in the joint when the jaw is opened and closed headachesjaw painjoint locking open or shutlimited ability to open the mouthpain behind the eyepain that spreads to the shoulders, neck, and backspasm or pain in the muscles used for chewing
Certain other symptoms are often seen in people who have temporomandibular joint disorders. These symptoms may be part of the TMJ. Sometimes they may be caused by another condition that is also occurring at the same time. These symptoms include: dizzinessear painhearing impairmentringing in the ears, also known as tinnitusvertigo, which is a sense of the room spinning around that is worsened by sudden movement or turningvisual impairments, such as blurred vision
The exact causes of temporomandibular joint disorders are still a subject of debate. Ninety percent of the people with TMJ are women in their childbearing years.
Many times, TMJ is linked to particular activities, such as: activities that cause the head to be held in an abnormal position, such as cradling a telephone on the shoulderclenching or grinding of the teethoral habits, such as yawning with the mouth wide open or eating chewy foods oftenoveruse of, or trauma to, the muscles used in chewingpoor posture, such as sitting improperly at a desk or computer station
Other causes of TMJ are as follows: abnormal sensitivity to pain in the area of the joint or muscles used for chewingabnormal structure of the joint, present at birthdental procedures, such as root canals and tooth extractionsdiseases affecting the muscles, such as fibromyalgiainjury, such as a motor vehicle crash or sports injuryjoint diseases, such as osteoarthritis or rheumatoid arthritismedical procedures, such as endotracheal intubation used to deliver general anesthesia during surgerypoor alignment of the jaw or teethstress
Prevention of temporomandibular joint disorders is not always possible. However, these measures may be helpful in avoiding or minimizing TMJ: Avoid postural problems by setting up work areas ergonomically and using a telephone headset.Correct oral habits such as teeth grinding and yawning widely.Seek effective treatment for diseases such as osteoarthritis and fibromyalgia.Use dental devices to correct abnormalities of the joint or help prevent teeth grinding.
The results of a medical history and physical exam often cause a healthcare professional to suspect a temporomandibular disorder. Blood tests and X-rays are often used to make sure more serious diseases are not causing the symptoms. No single test can confirm the diagnosis. Dental X-rays can sometimes help make the diagnosis.
Prolonged temporomandibular joint disorders may result in deformity of the joint. Poor alignment of the jaw or teeth can also result. The main long-term effect is frustration from the symptoms. For many people with TMJ, there are no long-term effects.
Temporomandibular joint disorders are not contagious. They pose no risk to others.
Initial treatment of temporomandibular joint disorders involves identifying actions that cause symptoms to get worse, such as clenching or grinding the teeth. Many people may not realize they are doing these things.
Some other measures used to treat TMJ are as follows: application of heat or coldmassagemedicines to relax the musclespain medicinesphysical therapy, which may involve mild jaw exercisesrelaxation therapya soft diet that avoids chewy foodsstress management
If these treatments fail, referral to a dentist who treats TMJ may be needed. Special bite appliances may be used. In severe cases of TMJ that do not respond to other treatments, surgery to realign the jaw is sometimes helpful. Joint replacement or a joint implant may be considered.
Pain medicines may cause stomach upset and allergic reactions. Medicines to relax the muscles may cause drowsiness or allergic reactions. Other side effects depend on the drug used. Surgery may cause bleeding, infection, or reactions to anesthesia. Surgery does not always cure TMJ.
If symptoms go away, no further treatment is generally needed for the temporomandibular joint disorders. The person should take care to avoid factors that may cause another episode of TMJ, such as teeth grinding.
Symptoms and a physical exam are used to monitor temporomandibular joint disorders. Sometimes, X-rays may be used to monitor the condition. Any new or worsening symptoms should be reported to the healthcare professional.
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