If the patient is before the age of six, then it is generally considered to be a loose baby tooth, which is a relatively good prognosis. If the patient is nearing tooth replacement, at the age of five or six, it can be considered to directly extract the knocked loose tooth, and then keep the gap for the permanent tooth to erupt. If it is determined that the tooth is a permanent tooth, a specific dental radiograph will be taken to check the looseness of the tooth and the presence of root fractures. If there is no root fracture and the tooth is only loose, the loose tooth can be fixed with the surrounding non-loose tooth for three to four weeks so that the tooth can be fixed better.