Teeth are grown in the alveolar sockets of the upper and lower jaw bone, and after the teeth are extracted, just like a fracture, the bone has to grow slowly, and it usually takes about 3 months to grow well. prematurely set teeth, the inner surface of the denture and oral tissue initially is in full contact, with the resorption of bone tissue, there will be a certain gap between the oral tissue and the inner surface of the denture, certain places have a fulcrum, the use of dentures easily lead to the resorption of bone tissue; not set teeth, can not chew food well when the food block is larger into the stomach, is not conducive to digestion, absorption, will increase the burden on the stomach and intestinal tract, long-term, will Affect the heart and other organs, and then affect the quality of life, reduce life expectancy, but this is a slow process, not easy to notice; veneers late, easy to cause the neighboring teeth tilt, the relative tooth elongation, even if veneers can not improve this situation, therefore, must be timely veneers. The jawbone tissue is the less dense bone tissue in the human body and regenerates slowly; as we age, the bone tissue regeneration will be slower and the veneering time may be prolonged; generally the alveolar ridge is as gently convex as a finger and no pressure pain is sufficient.