Tooth Fixation: At present, the most commonly used method to fix the anterior teeth is the periodontal splint with ligature wire combined with light-cured resin, that is, the diseased teeth are continuously ligated with adjacent healthy teeth with ligature wire, and then the nylon wire is fixed with light-cured resin to restore the appearance of the anterior teeth. After fixing by this method, the affected tooth is not only fixed, but also more beautiful in appearance and color than before. The loose posterior teeth are fixed by restoration methods, such as casting continuous clasp splint, or continuous crown and continuous inlay. After the restoration method is fixed, the affected teeth can bear greater resultant force and recover their functions well. In addition, individual loose teeth can be implanted into root canals without relying on adjacent healthy teeth, and good fixation effect can also be achieved.