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Most Common TMJ Problems Explained: Neuromuscular, Internal, and Degenerative Issues

TMJ (temporomandibular joint) disorders can significantly impact daily life, causing pain, discomfort, and difficulty in movement. They stem from the complex nature of the jaw and its connection to various muscles, bones, and ligaments and generally fall into three main categories: neuromuscular, internal or intracapsular, and degenerative.


Understanding the specific category of your TMJ issue can help in choosing the most effective course of action for relief and improved function.

TMJ Disorders Caused By Neuromuscular Problems

The temporomandibular joint, which helps the jaw move, relies heavily on the surrounding muscles to function properly. 

The muscles are doing their best to maintain the joint’s alignment in a three-dimensional space, which can be a real challenge if the jaw joint, bones, teeth, or jaw are misaligned. To compensate, the muscles of the face end up working too hard, which is the source of neuromuscular dysfunction. We call this type of condition maneuver muscular problems.
The second category of TMJ problems involves internal or intracapsular issues, which relate to the structure of the joint capsule itself. The capsule of the temporomandibular joint is a complex structure that contains bones, cartilage, fluids, nerves, and veins. This capsule provides support and stability to the joint, but it can be vulnerable to various forms of trauma.

Several factors can traumatize the joint capsule, leading to internal damage. These include hormonal imbalances, bite issues, trauma, bruxism (teeth grinding), and even misalignments in the joint. Over time, this damage can affect the cartilage, the soft tissue that cushions the joint, leading to conditions such as disc displacement

Disc displacement occurs when the disc that sits between the condyle (the rounded end of the jawbone) and the temporal bone is displaced from its normal position. This displacement can occur in several directions—anterior (forward), posterior (backward), lateral left or right, or even in a combination of these directions. A displaced disc results in painful clicking or popping sounds in the joint.

The clicking sound is often the first symptom noticed by patients, and it is a clear indicator of internal structural issues within the joint. It may occur when the joint moves and the displaced disc momentarily clicks back into position. If left untreated, disc displacement can lead to further degeneration of the joint, increasing pain and discomfort.

Degenerative Issues

The third category includes degenerative problems, which primarily affect the bone and the support structure of the disc. Degeneration can occur due to various factors, including trauma, hormonal changes, or other systemic issues. Over time, the bone may undergo changes in shape, volume, or structure. These changes can result in the loss of proper support for the disc, leading to further dysfunction in the joint.

As the bones change shape and structure, the joint may begin to lose volume. This can cause the joint to shrink and impair its movement. The lack of adequate bone support can lead to a limited range of motion in the jaw, making it difficult for the patient to move their mouth freely. In advanced cases, this degeneration can result in difficulty with basic movements like chewing, talking, or opening the mouth.

These degenerative changes can worsen if untreated, leading to more severe joint dysfunction and pain. The continued loss of volume in the joint causes the condyle to move less effectively, which impacts the entire jaw’s movement. As the joint becomes smaller, the patient may notice more pronounced issues, such as pain or difficulty when opening or closing the mouth.

Symptoms of TMJ Problems

Regardless of the underlying cause, TMJ issues can manifest in various ways, such as:
  • Clicking or popping sounds when moving the jaw, especially when opening or closing the mouth.
  • Limited mouth opening, making it difficult to eat, speak, or yawn.
  • Jaw deviationto one side when opening the mouth or difficulty in achieving smooth jaw movement.
  • Shaking or instability in the joint when the jaw is moved forward, indicating muscle fatigue or misalignment.
  • Pain in the facial muscles, jaw, or head, which can extend to the neck and shoulders.
  • Difficulty chewingdue to restricted jaw movement or pain.
In more severe cases, patients may also experience jaw locking, where the jaw is temporarily unable to open or close fully, and headaches that are often mistaken for tension headaches or migraines.

Treatment Options

TMJ disorders, especially those caused by neuromuscular issues and disc displacement, can be managed through a variety of treatments, depending on the severity and type of problem.

One of the most effective treatments is splint therapy, where a custom-made splint or night guard is worn over the teeth to help align the jaw and relieve pressure on the muscles and joints. This can reduce grinding, improve bite alignment, and over time, alleviate symptoms like muscle fatigue and joint strain.

In cases of internal capsular problems, repositioning the jaw may be necessary to improve the joint’s alignment. This can be done using splint therapy or through other physical therapies aimed at realigning the jaw and correcting bite misalignment, leading to improved function and reduced discomfort.
Another important approach is muscle relaxation, which helps ease muscle fatigue and pain. This can be achieved through various methods, including physical therapy, massage, or heat and cold therapy, all of which promote muscle relaxation and support better joint movement.

For more severe cases, surgical intervention might be needed, especially when there is significant structural damage or degeneration in the joint. Procedures such as arthroscopy or even joint replacement can address these issues and provide long-term relief.

In addition to the three main categories of TMJ issues, it’s important to also consider other rare but possible conditions such as ankylosis (the fusion of the joint) or tumors, which can also contribute to jaw dysfunction.
TMJ disorders can be complex, involving multiple factors that affect the joint, muscles, and bones. Precise diagnostics and early intervention are essential to preventing further deterioration of the joint and alleviating symptoms.

In Coldy Dent, we are dedicated to solving even the most complex TMJ problems; we have lots of experience and all the necessary technology to provide the best care – if you’ve noticed any of the symptoms, feel free to contact us and set your appointement.

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