A tooth split in half requires root canal treatment followed by crown restoration or extraction. 1. Crown restoration: If the tooth is split in half, with one half being smaller and the other half being larger and stronger, the small part of the split can be extracted, and then root canal treatment can be carried out, and the tooth can be prepared by using dental preparation with the help of staking and reinforcement, and then restored by using all-ceramic crowns, which can preserve the affected tooth. 2. Extraction: the two halves of the tooth split are larger, have been split to the bottom of the gums, or split from the middle of the tooth split to the root, or although the remaining tooth is larger, but has been root canal atresia, can not carry out root canal treatment, these kinds of cases can not be retained the affected tooth, you need to be extracted for implant restoration or activity restoration. The tooth is split in half, you need to consult a doctor in time, under the guidance of the doctor for examination and treatment, to avoid delaying the condition.