Occlusal interference causes an increase in salivary protein

It is important to accurately grasp the state of oc­ clusal contacts in prosthetic treatment. Various oc­ clusal test methods (articulating paper, the pull­out test, the Dental Prescale Occlusal System (GC,To­ kyo,Japan), the occlusal contact pressure distribu­ tion measurement system, and the check bite method using wax and silicone rubber) are cur­ rently used in prosthetic treatment and occlusial therapy. However, these methods have several dis­ advantages. The artificial paper method has low reproducibility because of changes in the material at the point of occlusal contact, surface roughness and moisture, as well as the number of times the contact is cy­ cled. The pull­out test has poor reproducibility and objectivity because the presence or absence of contact and the degree of tightness are evaluated from the resistance when pulling out plastic, metal strips, or thin film between the upper and lower teeth. With the Prescale method, there is a possi­ bility of measurement leakage on the front teeth, and the storage management of the pressure sen­ sitive sheet after color development affects the re­ sult. With the T scan, since the surface of the teeth does not coincide with the actual dentition, it is im­ possible to measure the occlusal force and the con­ tact area per tooth. 6 Stress is classified as human body stress and Occlusal interference causes an increase in salivary protein