Root Canal Retreatment: Why Root Canals Fail and What to Do Next

The success rate of root canals is high, but like any dental procedure, there are exceptions. Sometimes, a tooth does not heal as expected after treatment, while other times a new problem develops months or even years later. Fortunately, a failed root canal does not necessarily mean the tooth needs to be extracted. In many cases, root canal retreatment or another endodontic procedure can get rid of the persistent or recurrent infection after root canal treatment and preserve your natural tooth. 

At Endodontic Associates, our team takes a personalized approach to evaluating previously treated teeth and recommending the most appropriate next step possible. Keep reading to learn why root canals sometimes fail, when retreatment may be recommended, and what your options may be. 

Why do root canals fail? 

Although root canal treatment has an excellent success rate, there are several reasons a tooth may require additional treatment. In some cases, bacteria remain hidden within the complex root canal system, while in others, a new problem develops after the original procedure. Common reasons a root canal fail include:  

• Complex or curved canals that were difficult to fully clean 
• A missed canal that was not identified during the original treatment 
• A cracked or fractured tooth 
• New decay that allows bacteria to reenter the tooth 
• A damaged or leaking filling or crown 
• Delayed placement of the new restoration after treatment 

Identifying the underlying cause of root canal failure is one of the most important steps in determining which treatment is most likely to save the tooth. 

What are the signs you need root canal retreatment? 

Some patients notice symptoms shortly after a root canal, while others remain symptom-free for years before a problem develops. If a previously treated tooth becomes infected again, you may experience symptoms of a failed root canal, including:  

• Persistent or recurring tooth pain 
• Pain when biting or chewing 
• Sensitivity to pressure 
• Swelling of the gums or face 
• A bump or pimple on the gums near the affected tooth 
• Tenderness or discomfort that does not improve 

Even if your symptoms seem mild or come and go, it's important to have the tooth evaluated promptly. Early treatment may improve the likelihood of saving your natural tooth. 

Is root canal retreatment the only option after a primary root canal? 

Not always. Root canal retreatment is often the preferred treatment when the inside of the tooth can be accessed, cleaned, and sealed again. However, depending on the location and cause of the infection, our team may recommend an apicoectomy instead. This procedure treats the infection from the tip of the root rather than through the crown of the tooth and may be appropriate when retreatment alone is unlikely to resolve the problem. After a thorough examination and imaging, we'll explain your options and recommend the treatment that offers the best chance possible for long-term success. 

Can a failed root canal really be saved? 

In many cases, yes. Advances in endodontic techniques and technology allow many previously treated teeth to be successfully retreated, helping patients avoid extraction and replacement whenever possible. The key is seeking care before the infection progresses or causes additional damage. If you're experiencing symptoms after a previous root canal or you've been told a treated tooth may need further attention, our team can evaluate the tooth, identify the source of the problem, and develop a treatment plan focused on preserving your natural smile. 

Get advanced care for a failed root canal in Ridgeland, MS 

If you're experiencing pain after a root canal or other unexpected symptoms, don't assume extraction is your only option. At Endodontic Associates, our experienced team provides advanced endodontic care, including root canal retreatment and apicoectomy, to help save natural teeth whenever possible. We also offer same-day appointments for many patients because we understand that dental pain can't always wait. Contact our Ridgeland, MS, endodontists today to schedule an evaluation and learn about your treatment options.