The reasons for the loss of the second tooth on the right side include trauma, periodontal disease, dental caries, etc. Treatments include root extraction, tooth reimplantation, and autologous tooth transplantation. 1. Root-breaking extraction: It is mainly applicable to patients who have lost their second tooth due to trauma but the root of the tooth is still there, which affects the next step of treatment. 2. Re-implantation: For teeth with normal dentition and periodontal tissues that are lost due to trauma, they should be re-implanted immediately. If the tooth is lost due to endodontic disease or periodontal disease, the inflammation should be treated before implantation, and the indications should be strictly controlled. 3. In addition to the above methods, autologous tooth transplantation can also be taken. If children in the tooth replacement stage lose their teeth for no reason, it may be a normal tooth replacement, which can be left untreated until the new teeth grow in. The above methods should be operated in strict accordance with the indications, and those with underlying diseases such as dental caries should be treated first to avoid cross-infection. If the above symptoms occur, physiologic tooth replacement can be left untreated. If the symptoms are caused by trauma or dental disease, it is recommended to go to the hospital in time for early and regular treatment.