Jaw joint disorder, also known as temporomandibular joint disorder, is a common clinical condition with the typical symptoms of pain and popping in the temporomandibular joint. Which department should be listed for this disease depends on the specific situation of the hospital where the patient is seen. If the patient’s hospital only has a stomatology department, the joint disorder can be listed in the stomatology department, but in larger hospitals where the stomatology department has further subspecialties, the TMJ disorder should be listed in the oral and maxillofacial surgery department. There is also a very special clinical situation in a professional large dental tertiary hospital, where the oral surgery department may have further subspecialties, and the jaw joint department is divided, that is, the department specializing in joints, sometimes combined with the imaging, then the number of the special joint department is listed, and the TMJ disorder is most professionally examined by the specialists of the joint department.