Following root canal therapy, the tooth is now weaker and easily fractured. Should a fracture occur the tooth may need extracted. If there is enough natural tooth remaining following a root canal, a crown may not be needed. This can only be determined by your dentist.
Sometimes root canals become re-infected and need to be retreated.
Any of these symptoms must be evaluated by a dentist ASAP. You may simply have receding gums that can be treated with a de-sensitizing agent at the dentist’s office. You may also have a cavity that needs a filling, or the pulp (nerve) of your tooth is damaged and you may need a root canal.
Although teeth hard on the outside, in the middle of the tooth and its roots is the pulp (or nerve). Once this becomes infected or irritated, a root canal may be necessary.
The Doctor will remove the affected pulp or nerve by going through the top of the tooth and using specialized instruments to clean the entire pulp out of the tooth and its roots. The Doctor will then fill and seal the roots. Root canals are usually not painful and only take a little longer than a filling.