Temporomandibular joint disorders (often called TMD) are painful conditions of the jaw joint and muscles of the head and neck. The temporomandibular joints (TMJ) connect the lower jaw (mandible) to the temporal bones, and their hinge-like function is essential in activities such as chewing, talking, and swallowing.
TMJ disorders are very common problems, which occur more frequently in women than men. Although some types of TMJ disorders result in severe symptoms, most cases are mild and resolve with self-care or minimal treatment.
Temporomandibular joint disorders may result from problems with the muscles and soft tissues around the joint or problems within the joint itself. Often, though, the specific cause of an individual’s TMJ disorder is unclear.
Muscle pain. Some cases of TMJ disorders are attributed to muscle tension and stress. Habits such as teeth clenching and grinding may result in muscle soreness, muscle spasms, and pain.
Jaw joint issues. TMJ disorders can result from displacement of the soft disc, termed an articular disc, inside the temporomandibular joint itself. This disc is a cushioning material within the joint that normally absorbs shock during chewing. Jaw trauma, injury, or dislocation can lead to a TMJ disorder.
Arthritis. Arthritis is a joint disease that causes joint inflammation throughout the body, including the temporomandibular joints.
The symptoms of TMJ disorders are often mild and typically come and go over a period of time. Most individuals experience short-term problems, although, some individuals develop persistent or severe pain.
The following are the most common symptoms associated with TMJ disorders:
Clinicians diagnose TMJ disorders based on a patient’s history, symptoms, and physical examination. Occasionally, x-rays are used to provide an image of the jaw and neck. Computerized tomography or magnetic resonance imaging are additional studies, which provide highly detailed images of the bones and soft tissues.
Most TMJ problems are temporary and resolve spontaneously with little or no treatment. For mild joint pain, self-care and conservative treatments are often very effective.
Treatment of minor TMJ disorders
Resting the jaw joint
Ice pack applied to jaw
Physical therapy and jaw exercises
Treatment of severe or chronic TMJ disorders
Bite guards (stabilization splints), plastic devices placed between the upper and lower jaw, help reduce clenching and grinding.
Corticosteroid medication, injected into the joint, decreases inflammation.
Botulinum toxin (Botox®), injected into adjacent facial muscles, reduces jaw tension and pain.
Surgery is sometimes performed to repair a damaged joint and surrounding tissues. Such surgery is very rarely recommended to treat TMJ disorders, because it is often ineffective and may result in additional complications.
Avoiding stress and teeth grinding helps prevent certain TMJ disorders. Maintenance of good posture prevents excessive straining of the facial and neck muscles and may decrease a person’s risk of developing TMJ problems. Additionally, healthy lifestyle habits such as relaxation techniques, proper diet, and adequate sleep are generally recommended as preventative health measures.
TMJ Disorders. National Institute of Dental and Craniofacial Research website. http://www.nidcr.nih.gov/oralhealth/Topics/TMJ/TMJDisorders.htm. Accessed January 21, 2015.
Temporomandibular Joint Disorders. University of California San Francisco website. http://www.ucsfhealth.org/conditions/temporomandibular_joint_disorders/. Accessed January 21, 2015.
TMJ Disorders. Medline Plus website. http://www.nlm.nih.gov/medlineplus/ency/article/001227.htm. Accessed January 21, 2015.
TMJ disorders. Mayo Clinic website. http://www.mayoclinic.org/diseases-conditions/tmj/basics/definition/con-20043566. Accessed January 21, 2015.
Tina is a Life Science Writer for a number of online publications, including Innerbody.com. Her expertise is in conveying complex scientific topics to diverse audiences. Tina earned her PhD in Biochemistry from the University of California, San Francisco and her BS degree in Cell Biology from U.C. Davis. In her spare time, she enjoys drawing science-related cartoons.