There are various reasons for tooth loss, such as natural loss, external collision, periodontitis, etc. Milk teeth generally do not need to be dealt with, and permanent teeth can be dealt with by implantation or making denture. 1. Natural loss: Natural loss is mainly seen in milk teeth. This situation usually does not need treatment, after the milk teeth fall off by themselves, you can see the cusp of the permanent teeth, and the permanent teeth will grow out slowly to replace the missing position of the milk teeth. 2. External collision: External collision leads to complete loss of teeth, when the teeth are not fractured. The tooth can be strictly sterilized within 2 hours, and after completing the one-time root canal treatment, the lost tooth can be put into the socket to complete the autogenous dental implant. 3. Periodontitis: If the patient’s teeth are lost due to periodontitis and other diseases, implant restoration can be done if the alveolar bone is relatively full, or according to the situation of the adjacent teeth on both sides of the fabrication of movable denture or fixed prosthesis restoration, but before restoration, periodontitis should be actively treated, and restoration can be carried out after periodontitis is under control. Patients who have lost their teeth due to external forces or diseases are advised to go to the stomatology department of regular hospitals for examination and treatment, and not to deal with it privately.