When infection or deep decay damages a tooth, a root canal may be necessary to remove the infected nerve and pulp. Root canal therapy is often performed when a tooth becomes severely painful and requires immediate attention. Root canals are among the most common and successful dental procedures. When completed properly, they eliminate infection and protect the tooth from further damage. However, in some cases, a root canal can fail. The good news is that even if this happens, treatment options are available — and we may still be able to save your natural tooth. At Solitaire Family Dentistry, we carefully evaluate failed root canal cases and provide advanced solutions to restore your oral health.

What Is a Failed Root Canal?

A failed root canal occurs when: The original treatment does not completely remove the infection Bacteria re-enter the tooth after treatment The tooth becomes reinfected months or even years later Root canal failure may develop weeks, months, or even years after the initial procedure. Many patients recognize symptoms similar to their first infection, such as swelling, gum pimples, or tooth discoloration. If left untreated, the infection can spread to surrounding teeth and bone, making treatment more complex. Seeking prompt care significantly improves the chances of saving the tooth.

What Happens If a Root Canal Fails?

In some cases, you may not notice symptoms right away. Root canal failure can sometimes progress silently. However, it is important to understand that an infection inside the tooth will not heal on its own. Professional dental treatment is necessary to eliminate the bacteria and prevent further complications. If you suspect something is wrong, early diagnosis is key to preserving your natural tooth.

Symptoms of a Failed Root Canal

Signs of root canal failure may include:

• . Tooth pain when biting or chewing
• . Sensitivity to pressure
• . A pimple or boil on the gums
• . Tooth discoloration
• . Swelling near the treated tooth
• . Gum tenderness
• . Presence of pus or abscess
• . Facial or neck swelling in severe cases

It is normal to feel mild discomfort for a few days after a root canal. However, pain that continues long after treatment — especially if it interferes with eating or daily activities — should be evaluated immediately. At Solitaire Family Dentistry, we use diagnostic tools such as digital dental X-rays to determine whether reinfection is present and recommend the appropriate treatment.

How X-Rays Help Diagnose Root Canal Failure

Sometimes the symptoms are obvious. Other times, they are subtle.

Digital radiographs allow us to examine:

• . The treated root canal
• . The surrounding bone
• . The periodontal ligament
• . Signs of inflammation or infection

X-rays help identify hidden infections and guide us in creating the most effective treatment plan. They are also essential during follow-up visits to ensure proper healing.

What Is the Failure Rate of Root Canals?

Root canal treatment has a very high success rate — typically between 86% and 98%. This means only a small percentage of cases fail. Most patients experience long-term relief and retain their treated tooth for many years. When failure does occur, it is usually due to specific factors that can often be corrected.

Why Do Root Canals Fail?

Root canal failure can happen for several reasons, including:

. Missed or Complex Canals

Some teeth have curved, narrow, or additional canals that are difficult to detect. If a canal is missed or not thoroughly cleaned, infection may persist.

. Delayed or Loose Dental Crown

After a root canal, a dental crown protects the tooth. If crown placement is delayed, loose, or damaged, bacteria can re-enter and cause reinfection.

. Traumatic Dental Injury

A crack or fracture in the treated tooth may expose it to bacteria and lead to new infection.

. Obstructions

Filling material, sealants, or other structural complications may prevent complete cleaning during the initial procedure.

. Salivary Contamination

If saliva contaminates the inside of the tooth during treatment, bacteria may grow and cause infection again. Identifying the exact cause helps determine the best solution.

Can a Failed Root Canal Be Fixed?

Yes — in many cases, a failed root canal can be successfully treated. Your treatment options may include:

. Root Canal Retreatment

This is the most common and often most successful solution. The tooth is reopened, disinfected again, and resealed to eliminate the infection.

. Apicoectomy

This minor surgical procedure removes the tip of the root and places a new seal to prevent further infection.

. Tooth Extraction

If the tooth cannot be saved, extraction may be necessary. Replacement options such as dental implants can restore function and appearance. At Solitaire Family Dentistry, our priority is always to preserve your natural tooth whenever possible.

NOTE:  If you are experiencing pain after a root canal or suspect a failed root canal treatment, do not wait. Early intervention greatly increases the chance of saving your tooth and preventing further complications. Call Solitaire Family Dentistry today at 62814G7455 to book your appointment. Our experienced dental team will evaluate your condition, explain your treatment options, and provide the compassionate care you deserve. Relief is just one call away.