Retreatment is necessary when bacteria have re-entered
the tooth. This is usually due to decay or untreated
canal areas. The patient may experience swelling or
pain in chewing.
Sometimes a patient may have no symptoms, but an x-ray
shows that there is a problem with a tooth that has
previously undergone root canal therapy.
What Happens During Root Canal Retreatment?
After the tooth is "numbed", the canal system
will be reopened to remove the previous root canal material.
This may involve removing a crown, post and core material.
Sometimes we are able to make a small hole in the existing
restoration and work through that opening. The canals
are then thoroughly cleansed and shaped.
The canals are refilled with gutta-percha and the opening
is sealed with a sterile cotton pellet and a temporary
The tooth is usually restored within a couple of weeks.
If your existing crown can be saved, then you will need
to have it repaired. If you do not have a crown, it
will probably be recommended.
With time, the bone will heal where the bacteria was