Like any other medical procedure, endodontic treatment cannot be guaranteed. Endodontically treated teeth can fail to heal for a number of reasons:
In these cases it may be possible to carry out the treatment again, a procedure called endodontic retreatment.
![]() Retreatment is usually more complicated than initial root canal treatment as the tooth is normally fully restored with a permanent restoration. This can range from a simple restoration to a full coverage restoration such as a crown or as part of a bridge. In addition to this a post may have been placed inside the root prior to a final restoration being placed. This creates difficulty as access to the root canals is more difficult.
![]() Illustrations reproduced with permission from the American Association of Endodontists
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