Thanks to the development of related medicine, life science and modern high technology, the development of dentistry in China has been particularly rapid in recent years, with new theories and concepts appearing continuously; people’s knowledge of oral hygiene has also increased year by year. In the highly developed modern society, especially in the coastal and other developed areas, people’s life pace is increasingly accelerated, and the mental tension and life stress are also reflected in oral diseases. The most closely related to it, such as temporomandibular joint disorder, is a common disease in dentistry in recent years. This disease occurs mostly in young people, especially women, and it is generally believed to be caused by poor occlusal relationship between teeth as an internal cause and mental factors as an external cause. This TMJ disorder has gradually become the third major disorder after caries, the first major disorder of dentistry, and periodontal disease, the second major disorder, which seriously affects the daily life of some people. As we all know, the human body is an organic whole, and the disruption of the balance of this organic whole will cause diseases. The normal operation of the mouth and jaw function relies on the synergy between the elements that make up the mouth and jaw system in a rounded manner, and any abnormality in any one of them may affect the coordination and balance of the whole system. The teeth are part of the organs that make up the mouth, which in turn are part of the body as an organic whole. Diseases or missing teeth can affect the occlusal function, and abnormal occlusion can affect other organs of the mouth, and even the health of the whole body. The human head is supported by a small cervical and pivotal vertebra and its surrounding muscles, so it has a lot of flexibility, but at the same time it is also vulnerable to external factors. The abnormal occlusion affects the balance of the muscles around the mouth and the neck muscles at the same time, but also disrupts the balance of the head, and the body adjusts the muscles in other parts of the head in order to ensure the balance of the head to achieve a new balance. But this disrupts the original overall balance and puts the organism under an unbalanced state. This is why the dysfunction of TMJ disorders is usually not only characterized by localized pain and restricted opening, but also by systemic symptoms in most patients. Such systemic symptoms include migraine, shoulder and neck muscle pain, lumbar muscle pain, hand and foot pain, nocturnal teeth grinding, dizziness, otalgia, fatigue, concentration problems, and gastrointestinal disorders. Research data from many scholars have shown that TMJ disorders and their systemic concomitant symptoms are closely related to occlusal abnormalities. On the other hand, there have been many successful clinical cases in which patients with the above-mentioned concomitant symptoms can have their systemic concomitant symptoms improved, such as disappearance of headache, healing of shoulder and neck muscle pain, and reduction of lumbago, by means of denture repair, orthodontic treatment, and occlusal plate treatment. In conclusion, the occlusal relationship between the upper and lower teeth is the key to ensure the relationship between the lower jaw for the position of the head, as well as the guarantee of exercising normal chewing movement. When teeth are missing, bad prosthesis or other oral diseases exist in the mouth, the occlusion is damaged, the position of the lower jaw to the head is changed, and the chewing function cannot be exercised normally, which destroys the balance of the oral system and the balance of the whole body, thus leading to the appearance of the accompanying symptoms of the whole body. Therefore, those whose occlusal function is affected by dental diseases or missing teeth should go to the hospital for reasonable treatment as soon as possible to avoid affecting other organs or even the health of the whole body, to ensure the integrity of the occlusion, and to maintain the balance of the oral system.