Do all teeth that have to be crowned need root canal first?
NO. Root canals are done only if there is irreversible damage to the nerve. All teeth that have been root canaled should be crowned but it is not necessary to have a root canal in order to have a crown placed if the nerve in the tooth is healthy. Root canal treatment removes the nerve from the tooth and therefore the blood supply. This will make the tooth brittle over time and increases the chances of fracture so a crown is placed to strengthen the tooth and decrease the possibility of breakage.