If a tooth is split in half and one half moves, the moving half can be extracted first and the remaining tooth, decay or split, can be observed to see if it is deeper below the gum. If the location is deeper and cannot be repaired, the whole tooth can be extracted. If the location is still possible, a revision is done at the gum to expose the edge of the tooth so that the tooth can be repaired and a porcelain inlay or porcelain full crown can be made, which can ensure the integrity of the tooth and the ability to chew normally. In addition, if the split part has exposed the nerve, root canal treatment is needed, and after killing the nerve, the restoration of porcelain crown will be done. If the back tooth is split in half and half of the tooth is loose, you can do a tooth hemisection, root canal treatment of the remaining tooth, and then do the porcelain crown restoration, it may also be possible to retain, so there is no need for dental implants, the damage to the tooth will be smaller, and the cost will be lower.