TMJ (temporomandibular joint) disorders are a family of problems related to your complex jaw joint. TMJ pain disorders usually occur because of unbalanced activity, spasm, or overuse of the jaw muscles. The following are common symptoms.
These symptoms occur when the joints of the jaw and the chewing muscles (muscles of mastication) do not work together correctly. It is important to note that joint noise is not always indicative of a TMJ disorder and quite frequently requires no treatment at all.
TMJ disorders develop for many reasons. You might clench or grind your teeth, tightening your jaw muscles and stressing your jaw joint. You may have a damaged jaw joint due to injury or disease. Injuries and arthritis can damage the joint directly or stretch or tear the muscle ligaments. As a result, the disk, which is made of cartilage and functions as the “cushion” of the jaw joint, can slip out of position. Whatever the cause, the results may include a misaligned bite, pain, clicking or grating noise when you open your mouth or trouble opening your mouth wide.
The initial goals are to relieve the muscle spasm and joint pain. This is usually accomplished with a pain reliever, anti-inflammatory, or muscle relaxant. Steroids can be injected directly into the joints to reduce pain and inflammation.
Stress management techniques such as biofeedback or physical therapy may also be recommended, as well as a temporary, clear plastic appliance known as a splint. A splint (or nightguard) fits over your top or bottom teeth and helps keep your teeth apart, thereby relaxing the muscles and reducing pain. There are different types of appliances used for different purposes. A nightguard helps you stop clenching or grinding your teeth and reduces muscle tension at night and helps to protect the cartilage and joint surfaces. An anterior positioning appliance moves your jaw forward, relieves pressure on parts of your jaw and aids in disk repositioning. It may be worn 24 hours/day to help your jaw heal. An orthodontic stabilization appliance is worn 24 hours/day or just at night to move your jaw into proper position. Appliances also help to protect from tooth wear.