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.