In life, we start to ignore small details such as tooth decay and bleeding gums, and then ignore dental and periodontal diseases, which finally lead to the departure of teeth. Until this time, even some people will choose to ignore, so when a tooth leaves we will find that eating is always stuffed, the teeth slowly become longer, and the caries which is not paid attention to for a long time is getting more and more serious, then the teeth start to loosen, and the words are stammered and slurred, soon the second tooth also leaves, it leaves much faster than the first tooth, the first tooth leaves with 1 year The first tooth took one year to leave, but the second tooth only took six months. The damage of the missing tooth is far from ending with that tooth, on the contrary, it is just beginning. 1, the integrity of the dental column is destroyed: after the tooth is missing, if it is not restored for a longer period of time, the adjacent teeth will become tilted due to the loss of reliance and restraint, which will easily cause the disorder of biting and jaw function. 2.Alveolar bone atrophy: After tooth loss, the physiological stimulation of the alveolar bone by the normal biting force no longer exists, and the alveolar bone will have different degrees of disuse atrophy, and it will bring great difficulties to the later denture repair and maintaining the balance and stability of the oral and maxillofacial surfaces. 3.Decreased chewing function: After tooth loss, the remaining teeth undergo a series of changes, so that the original good biting relationship changes, and the chewing efficiency decreases due to the corresponding decrease in the effective functional area between the remaining teeth. 4, food embedding: normal teeth and teeth, arranged very closely, after the neighboring teeth move, teeth and teeth will appear gaps, easy to make food embedding into the gap between teeth, causing bad breath, dental caries, periodontal disease, etc. 5.Tooth loss: Since the teeth on the left and right side of the missing teeth cannot get their original support pressure, they will become tilted in the gums, making the teeth gradually loose and leading to partial tooth loss. 6. It may cause temporomandibular joint lesions. Prolonged loss of unilateral teeth will also develop the habit of chewing on the side, which will lead to facial asymmetry and joint symptoms. 7, tooth loss will affect the facial shape, after all the teeth are missing, the whole person will look much older than the same age. 8.Tooth loss will make people’s pronunciation become non-standard and affect people’s social activities. 9.After tooth loss, the chewing function will decline and affect the body’s absorption of nutrients.