Root canal failure, as well as failure of any dental treatment, is often associated with bacteria. Bacteria that is incompletely removed from the canal system during endodontic treatment will cause root canal failure. Unfortunately, sometimes that failure is not identified until months or years later and then some people condemn root canal therapy as unsuccessful, when the cause may be incomplete root canal therapy leaving bacteria behind in the canals.
The following example is a root canal that was done 13 months ago by an associate dentist in a general dental practice. This can sometimes create a difficult situation for the owner dentist, when the patient returns with an abscess a year later.
|CBCT shows missed MB canal and short ML canal filling.
|Missed MB canal located immediately with microscope.
|All canals cleaned and shaped. This tooth now has good prognosis for success.