The tooth will crack after treatment, need to take the crown protection, extraction treatment and so on. 1. Crown protection: When a tooth cracks after treatment, it can be protected with a crown. Crown protection is actually the use of a crown inserted into the root canal to obtain a fixed force, and then the crown is restored to achieve the purpose of protection. 2. Extraction treatment: If the tooth cracks more seriously after treatment, and the cracks have reached the root, extraction treatment is needed, and restoration will be carried out after the extraction wound has healed. Teeth cracked after treatment, you need to go to the hospital in a timely manner to improve the examination, under the guidance of the doctor to take standardized treatment, do not take care of the treatment, so as not to lead to adverse consequences.