Root Canal Re-treatment

Root Canal Re-treatment

A root canal is a procedure performed by an endodontic specialist to remove the infected pulp from a tooth’s root, clean the tooth's canals, and seal them off to prevent further infection. Sometimes, however, an infection can return after the procedure. If this happens, the endodontist in 94086 may recommend root canal retreatment.

During a root canal retreatment at Jen Kuei Wang DDS, our endodontic specialist, will remove the filling material and any leftover debris from the tooth. They will then clean the inside of the tooth again and seal it with a new filling. A crown or other restoration will be necessary to protect the tooth from further damage.

When Is Root Canal Retreatment Necessary?


Despite a successful initial root canal, reinfection can occur if the tooth's filling or crown is compromised, allowing bacteria to re-enter the pulp chamber. This might happen due to a cracked or leaking crown, which provides an entry point for bacteria. In such cases, root canal retreatment is required to remove the source of reinfection and address any new infection. 

Delayed Crown Placement

After a root canal, a tooth typically requires a crown to provide structural support and prevent fracture. If the crown is not placed promptly or it becomes damaged, the tooth may become vulnerable to reinfection or structural issues, necessitating retreatment. 

Persistent or New Infection

Sometimes, the infection may not be completely resolved during the initial root canal, or a new infection can develop. This often causes pain, swelling, and discomfort, and retreatment may be required to address the issue. 

Dental Trauma

Trauma to a tooth, such as a blow or accident, can damage the root or re-introduce infection. In such cases, retreatment may be necessary to address the new issues caused by trauma. 

Orthodontic Treatment

Teeth undergoing orthodontic treatment may require retreatment if a tooth's position is adjusted during orthodontic procedures. These changes can sometimes affect the integrity of a previously treated tooth, necessitating retreatment. 

The Procedure for Root Canal Retreatment 

First, our endodontist will remove the crown from the tooth to gain access to the roots. Then, they will use special tools to remove the old filling material and clean the canals. Next, they will fill the canals with a rubber-like material and temporarily fill the tooth. Finally, a new crown will be placed over the tooth to protect it. 

After a root canal retreatment, you may experience some discomfort and sensitivity for a few days. However, this can usually be managed with over-the-counter pain medication. It is essential to follow all instructions provided by our endodontic specialist to ensure a successful outcome. 

Root canal retreatment can save your tooth and prevent further damage. If you are experiencing pain or other problems with a tooth treated with a root canal, contact Jen Kuei Wang DDS at (408) 245-8822 or visit us at 1286 Kifer Rd., STE 111, Sunnyvale, CA 94086.


1286 Kifer Rd., STE 111,
Sunnyvale, CA 94086

Fax: (408) 245-8823

Office Hours

MON - FRI8:30 am - 5:00 pm

SAT - SUNClosed