If the cross section is above or below the gingival margin, the root canal treatment can be completely completed, and then the full crown is restored after root canal treatment. This is the porcelain crown. If the cross section is too low for root canal treatment, the entire denture, which can be removable denture, porcelain tooth or dental implant, must be pulled out. The specific choice depends on age, adjacent teeth, general condition and local anatomy.

If you have had root canal therapy, half of your teeth are cracked, and your teeth are not painful or loose, you can rely on them for a while, but this is not treatment or tooth preservation, just relying on them.