The normal occlusal relationship of the oral cavity should involve at least the following aspects: 1. The face should be basically symmetrical and coordinated from left to right; 2. For the jaws, the size, shape and position of the jaws should be basically normal; 3. In terms of the teeth, the size and shape of the teeth should be basically normal, the teeth should be basically neatly arranged, there should be a good contact relationship between adjacent teeth, and the upper and lower teeth should have maximum cusp-fossa contact. There should be a good relationship between the cusp fossa, and there should be good contact between the upper and lower teeth; 4. In terms of jaw movement, the jaw movement should be basically normal; 5. In terms of TMJ function, the joint function should be normal; 6. In terms of muscle, that is, the muscle function of the mouth and jaw face, it should also be normal. Only in this way can a truly good oral occlusal relationship be achieved.