This thesis reviews temporomandibular joint (TMJ) disc displacement with reduction (DDWR), a common condition affecting jaw function. The TMJ is a complex joint that enables chewing, speaking, and swallowing. It includes the mandibular condyle, articular disc, and glenoid fossa, with the disc acting as a cushion for smooth movement. In DDWR, the disc becomes displaced, often due to stress or imbalance, disrupting normal joint mechanics. This can cause symptoms like jaw clicking, headaches, neck pain, and ear discomfort.