Large teeth cracked in two halves need to go to the hospital to take pictures to check the location and depth of the crack, if it is a longitudinal fracture of the root needs to be extracted, if the crack to the crown of the gingival part, can be root canal treatment after crown repair. 1. Longitudinal root fracture. If the tooth is cracked in two halves and one side is shaking and the other is not shaking, we should take a picture to check the location of the crack, and if it causes longitudinal root fissure, we need to extract the tooth, and then restore it with implantation at a later stage. 2. The crack reaches above the neck of the crown. The loose part can be extracted, and the remaining teeth can be treated with root canal therapy, and then restored with implant crown. It is recommended to go to the hospital in time to avoid inflammation and pain. It is recommended not to bite hard objects excessively in order to avoid tooth fracture.