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10365 S.E. Sunnyside Road, Suite 260
Clackamas, OR 97015


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Endodontic Retreatment


Why do I need another endodontic procedure?



Cross-section of a tooth suffering from post root canal infectionAs 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
Cross-section of a tooth suffering from post root canal new decayIn 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

What will happen during retreatment?


Cross-section diagram of a tooth with a deep cavity and infected pulpFirst, the endodontist will discuss your treatment options. If you and your endodontist choose retreatment, the endodontist will reopen your tooth to gain access to the root canal filling material. In many cases, complex restorative materials—crown, post, and core material—must be disassembled and removed to permit access to the root canals.

Cross-section diagram of a tooth cleared of its pulp and roots in preparation for a fillingAfter removing the canal filling, the endodontist can clean the canals and carefully examine the inside of your tooth using magnification and illumination, searching for any additional canals or unusual anatomy that requires treatment.

Cross-section diagram of a tooth being filled with a temporary fillingAfter cleaning the canals, the endodontist will fill and seal the canals and place a temporary filling in the tooth. If the canals are unusually narrow or blocked, your endodontist may recommend endodontic surgery. This surgery involves making an incision to allow the other end of the root to be sealed.

Cross-section diagram of a now-healthy tooth after a successful root canal treatmentAfter your endodontist completes retreatment, you will need to return to your dentist as soon as possible to have a new crown or other restoration placed on the tooth to protect and restore it to full function.

Is retreatment the best choice for me?


Whenever possible, it is best to save your natural tooth. Retreated teeth can function well for years, even for a lifetime.

Advances in technology are constantly changing the way root canal treatment is performed, so your endodontist may use new techniques that were not available when you had your first procedure. Your endodontist may be able to resolve your problem with retreatment.

As with any dental or medical procedure, there are no guarantees. Your endodontist will discuss your options and the chances of success before beginning retreatment.

What are the alternatives to retreatment?


If nonsurgical retreatment is not an option, then endodontic surgery should be considered. This surgery involves making an incision to allow access to the tip of the root. Endodontic surgery may also be recommended in conjunction with retreatment or as an alternative. Your endodontist will discuss your options and recommend appropriate treatment.

What are the alternatives to endodontic retreatment and/or endodontic surgery?


The only other alternative is extraction of the tooth. The extracted tooth must then be replaced with a bridge, removable partial denture or implant to restore chewing function and to prevent adjacent teeth from shifting. Because these options require extensive surgery or dental procedures on adjacent healthy teeth, they can be far more costly and time consuming than retreatment and restoration of the natural tooth.

No matter how effective tooth replacements are—nothing is as good as your natural tooth. You've already made an investment in saving your tooth. The payoff for choosing retreatment could be a healthy, functioning natural tooth for many years to come.

Read more about endodontic retreatment from the American Association of Endodontists.

Information provided courtesy of the American Association of Endodontists. Copyright© 1995-2016.
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Matthew R. Baumgarth, DDS, MS


10365 S.E. Sunnyside Road
Suite 260
Clackamas, OR 97015
(503) 698-4484
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