If it is a wisdom tooth, it is recommended to extract it. If it is a front molar, depending on the depth of the crack, resin restoration, crown restoration, root canal treatment, or tooth extraction will be done. If the wisdom tooth is cracked, it is recommended to extract it as early as possible because it is often blocked and difficult to grow out, and the position is backward and more difficult to maneuver. If the front molar tooth is cracked, we need to take pictures to check the depth of the crack, the crack reaches the dentin, and if there are symptoms, we may use the drug strontium chloride to desensitize the dentin or fill the tooth, and if the crack is large, we can also do crown restoration. If the crack reaches the pulp cavity, root canal treatment is needed after crown repair. If the root of the tooth is longitudinally fractured, the tooth should be extracted. The last big tooth is cracked, it is recommended to go to the hospital in time to check and deal with, to avoid cracks continue to aggravate.