The treatment of cracked teeth includes causative treatment, symptomatic treatment and prevention of splitting. 1. Treatment for the cause: for cracked teeth caused by uneven occlusion, it is necessary to adjust the occlusion and grind the steep cusp to spread the occlusal force. 2. Symptomatic treatment: If the crack is shallow, composite resin can be used to fill the groove; if the groove is deep, root canal treatment is preferred. 3. Preventing splitting: After root canal treatment, the tooth should be restored with a crown to prevent the tooth from splitting. In order to prevent the occurrence of cracked teeth, it is best to avoid the tooth to bear too heavy biting force, to avoid stress concentration. When a tooth is cracked, it is important to go to the hospital in time to prevent the crack from deepening and delaying the best treatment period.