From the simulation diagram in Figure 4.20, it can be clearly discerned that when the protruded jaw bites, the large-scale deflection occurs due to the unobstructed mechanism at this time. The design with the features of the occlusal block can definitely resist the teeth The applied force can be seen in Figure 4.21 to firmly limit the downward force of the teeth, so even a user with a protruding jaw will not increase the difficulty of the physician in performing a gastroscopy.