The etiology of temporomandibular joint dislocation is mainly divided into endogenous and exogenous. Endogenous etiology mainly refers to the acute dislocation of temporomandibular joint when patients with joint structure disorder or masticatory muscle disorder laugh, sneeze, yawn, vomit or bite a large piece of food. In addition, the anterior slope of articular tubercle is too steep, which is also easy to cause acute dislocation of temporomandibular joint.

The external cause refers to the dislocation of temporomandibular joint caused by external force when oral tracheal intubation, esophagoscopy, laryngoscopy or mouth opening. In addition, if the elderly have chronic wasting diseases, it will lead to abnormal muscle tension and ligament relaxation, which will lead to dislocation of temporomandibular joint. In addition, if the elderly have chronic wasting diseases, it will lead to abnormal muscle tension and ligament relaxation, which will lead to dislocation of temporomandibular joint.

Mandibular dislocation refers to the phenomenon that the condyle slips out of the articular fossa beyond the normal limit and cannot be reset by itself, which is mainly related to the dysfunction of mandibular temporomandibular joint, abnormal joint structure and trauma. The clinical symptoms are: 1, abnormal mandibular movement, open front teeth, unable to close, saliva overflowing from the mouth, which will affect chewing and swallowing. 2, because the mandible obviously extends forward, it can lead to a longer face. 3. It was found that there was a depression in front of the tragus, and the dislocated condyle was felt under the zygomatic arch. The treatment method is to fix the joint by manual reduction or bandaging, and in severe cases, it is necessary to open and fix it internally.

The most common case of mandibular dislocation is that the teeth can no longer be closed and the face becomes longer. If it is unilateral dislocation, the face will be skewed. If it is bilateral dislocation, the jaw will stretch forward, the face will become longer, the cheeks will flatten, and there will be a depression in front of the tragus. It is best to go to a professional dental medical institution and have it reset by a professional doctor.

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