About the jaw joints

The jaw joints are just in front of your ears where the lower jaw bone (mandible) meets the skull. The joints allow you to open and close your mouth and move it from side to side or backwards and forwards. These movements are brought about by muscles that surround the joints. Each joint is made up of part of the surface of each bone - the jaw and the skull - surrounded by a capsule. One side of the capsule is made of a ligament called the lateral ligament. Between the two bones is a disc of fibrous tissue which helps the jaw to move smoothly. The medical name for the jaw joint is the temporomandibular joint (TMJ).

Problems that affect the jaw joint

There are various problems that can cause jaw pain, clicking, stiffness or spasm (trismus). One cause of problems may be small bony growths around the joint. These may be due to irregularities in your joint that have always been there or new growths that have developed. Older people may get pain in their jaw joint due to arthritis, when the joint becomes worn with age. Jaw problems can develop if there are changes in the way your teeth meet when you bite together, for example after having lots of teeth removed. Another cause of jaw joint problems is previous jaw injuries, such as dislocation. A common problem affecting the jaw joint is called temporomandibular joint dysfunction (TMJD), where the jaw joint does not open or close correctly.

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How Do I Manage Jaw System Dysfunction?

Awareness of Habits or Jaw Use Patterns

The teeth are supposed to make contact during eating and swallowing, but at no other time. When the jaw is not working during eating, swallowing, yawning and talking, the teeth should be apart and the jaw should be at rest. Notice any contact your teeth make. Notice any clenching, grinding, gritting, tapping of teeth or tensing of jaw muscles.

Notice when these tooth contacts or the jaw muscle tensing most often occurs, such as during driving, studying, reading, social situations, conversation, fatigue, overwork, stress, emotional upsets, work, sports.

Positioning of the Jaw to Avoid Tooth Contacting Habits

Place the tip of the tongue just behind the top front teeth and keep the teeth slightly apart. Maintain this position whenever the jaw is not being used.

Diet Modifications

Softer foods place less stress on the jaw muscles and joints than coarser foods. Avoid eating coarse, hard foods that requires you to bite into them with the front teeth, such as apples or sandwiches. Cut these foods up into small pieces and eat them on the back teeth. Don’t chew gum or soft chewy foods that require excessive jaw movements.

Avoid Wide Jaw Opening

Excessive movements of the jaw will place stress on the joints and muscles.

Do Not Test the Jaw

You may want to periodically move your jaw around to check whether you are making progress and see if the soreness is resolving. To do this, people usually open and swing the jaw from side to side beyond the comfortable range of motion. When you move your jaw to the point where you produce pain and discomfort, you have added to the stress on your muscles and joints and this can cause continuation of the problems you are trying to eliminate.

Sleep Patterns

Avoid sleeping on your stomach, which places the jaw in a position where considerable pressure is place upon it. Propping pillows beside you may be helpful in avoiding unconsciously moving onto your stomach. This can be a difficult pattern to break. Avoid sleeping patterns where the jaw is rested upon a hand or arm, which also applies considerable pressure to the jaw.

Support the jaw during yawning:

Place your index finger and thumb on our chin to provide some extra stability to the lower jaw during yawning.

Additional strategies:

Avoid leaning on your chin or jaw at any time. This even applies to posturing your head to press a telephone against your shoulder. There can be an infinite number of factors contributing to a jaw dysfunction. It is easily possible that this guide has overlooked a factor that is important in your problem. Please advise us of anything that you think may be contributing. Your input is important. Moist heat applied to the area of discomfort twice a day for ten-minute intervals is helpful. Keep rested and maintain good nutrition, whilst trying to avoid additional stressful commitments that may adversely affect your present condition. A mild analgesic such as ibuprofen (Advil) can be of value during recurrences of pain. These should not be used if you have previously experienced reactions to these drugs or if your physician has advised you against taking them.

© Dr. Garry Lunn

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