Why do I need another endodontic procedure? As occasionally happens with any dental or medical procedure, a tooth may not heal as expected after initial treatment for a variety of reasons:
Narrow or curved canals were not treated during the initial procedure. Complicated canal anatomy went undetected in the first procedure. The placement of the crown or other restoration was delayed following the endodontic treatment. The restoration did not prevent salivary contamination to the inside of the tooth. In other cases, a new problem can jeopardize a tooth that was successfully treated.
For example:
New decay can expose the root canal filling material to bacteria, causing a new infection in the tooth. A loose, cracked or broken crown or filling can expose the tooth to new infection. A tooth sustains a fracture
<the above quoted from AAE.org>
The following case x rays are of Seung H Baek, DDS, Inc. and can’t be copied or reproduced without permission. they were initially treated by previous doctors and came with complications, final x rays show healing after the retreatment from Dr. Baek.
Tags: Root Canal