With the improvement of living standards, people pay more and more attention to their teeth, but there are still some people who think that it is okay to be missing one or two teeth or that people have to lose their teeth sooner or later when they are old, and it is not too late to get a tooth when all the teeth are gone. These concepts are wrong, missing teeth without filling, there are many hazards. The hazards of not filling missing teeth: 1, old face Teeth have a very important role in maintaining the appearance of the face, especially the front teeth have a great impact on facial beauty. Missing front teeth can make a person look younger and less energetic, making him/her look more aged. In addition, when most or all of the teeth are missing, the cheeks will lose support and sink inward, the lips will not be full, the facial folds will increase, the nasolabial folds will deepen, the corners of the mouth will sink, and the face will show obvious aging. 2, gastrointestinal involvement After the loss of teeth, the first thing is that the chewing function becomes worse, and the degree of impact is related to the location and number of missing teeth. Missing front teeth will affect the biting of food, and missing back teeth will affect the grinding of food. When the chewing function is reduced, food that is not sufficiently ground and mashed will directly enter the gastrointestinal tract, which will greatly increase the burden on the digestive system and also affect the absorption of nutrients. In the long term, this may even lead to digestive system diseases. In addition, if all the teeth are missing, it will be difficult to close the lips strongly, and swallowing food will also become difficult. 3, the remaining teeth suffer After the teeth are missing, the task of chewing will fall on other teeth, and because of the existence of the missing tooth space, the neighboring teeth also lose the restraint and dependence, which will greatly increase the burden of the remaining teeth. If it is not restored for a long time, it may cause the tilt of the adjacent teeth and the elongation of the teeth that bite with them, etc., and then cause caries and periodontal disease, which further aggravate the damage to the remaining teeth. When the number of remaining teeth is small, they will cause rapid loss of alveolar bone, loosening or even loss of teeth due to the excessive biting force they bear. The longer and more the number of missing teeth, the more the impact on the remaining teeth will be.