As soon as I got out of the house in the morning, I saw Grandma Wang and grandma Wu in the elevator and said hello. Then with my sharp professional ethics, I opened the conversation box: “it’s time for you to have your teeth inlaid. There are few left. How hard it is to eat.” The second old man said with a smile, “old and normal.” So I took the second old man and said with a crackle that prevention is better than cure. < / P > < p > in our traditional way of thinking, we often associate “old” with “missing teeth”. As a result, many people think that it is normal for them to lose their teeth when they are older. In fact, this is a misunderstanding. Dental diseases are the main causes of tooth loss in the elderly. Caries and periodontal disease are the most common dental diseases. If the elderly do not have caries and periodontal disease, it is completely possible to avoid “old teeth”. < / P > < p > “it’s too troublesome to drop one and insert another. It’s better to wait until it’s all gone.” This is also a wrong idea. According to the national oral health epidemiological survey, the average number of teeth missing in Chinese people over 60 years old is about 10, and the restoration rate of missing teeth is only 18%. Some old people think that it doesn’t matter if they lose a few teeth, and this idea is also wrong. Missing teeth not only affects appetite, but also leads to malnutrition. Therefore, it is suggested that the elderly should be restored in time after missing teeth, and do not wait for the whole tooth to fall off before inlaying. Developed countries set the dental health standard for the elderly as “8020”: that is, they still have 20 healthy teeth at the age of 80. < / P > < p > self care should brush your teeth carefully and correctly every day, and only one tooth should be responsible for it. For example: use the improved pasteurization method to brush teeth, use dental floss and other tools to clean the gap in time, at least brush teeth in the morning and evening, and gargle after meals. < p > < p > reasonable diet, less hard food. Often eat hard food, will make enamel excessive wear, easy to cause dentin hypersensitivity, serious may cause tooth fracture, thus affecting the life of teeth. < / P > < p > regular oral examination oral health examination should be conducted once every six months or at least once a year, and dental cleaning and oral examination should be conducted to find out problems in time. < / P > < p > in time, every tooth has an irreplaceable role. Even if one tooth is missing, it will reduce the chewing ability and affect digestion and absorption. If the time of missing teeth is long, it will cause the collapse of adjacent teeth, the space occupying of jaw teeth, and the deformation of muscles and joints. < p > < p > the removable denture uses the mucosa and bone tissue under the residual natural tooth base as the support, relies on the denture retainer and the base to retain, and uses artificial teeth to restore the shape and function. < / P > < p > disadvantages: after installation, the adaptation time is a little longer, and the volume is larger, there is a foreign body feeling in the mouth, some will affect the pronunciation, the stability is poor, the chewing function recovery is poor, the metal hook will affect the cosmetic effect, and long-term use may have certain damage to the adjacent teeth. < / P > < p > advantages: the fixed denture is small in size, comfortable, beautiful and free of foreign body feeling. It is easy to get used to it after being put into the mouth. Its chewing function is very good, just like the real teeth. < / P > < p > advantages: the implant does not damage the adjacent teeth, is comfortable after wearing, can maintain normal alveolar bone, has similar bite force with natural teeth, and has long service life. < / P > < p > disadvantages: the cost is high, some patients with special chronic diseases, severe smoking and alcoholism who can not maintain good oral hygiene conditions are not suitable for implant repair.