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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.
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What Happens During Root Canal Retreatment?
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Step One:
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.
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Step Two:
The canals are refilled with gutta-percha and the opening is
sealed with a sterile cotton pellet and a temporary filling.
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Step Three:
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.
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