What If a Root Canal Still Hurts? Retreatment and Apicoectomy Options

🔁 When Symptoms Persist After a Root Canal

Most root canals heal well, but some teeth may continue to feel tender or become uncomfortable months or years later. Common reasons include complex anatomy or an additional canal that was not treated, leakage around an old filling or crown, a new cavity, or a crack that allows bacteria to re‑enter.

🧪 How We Evaluate the Tooth

• Comprehensive exam and gentle tests to pinpoint the source of symptoms.
• High‑resolution X‑rays and, when appropriate, cone‑beam CT (CBCT) to assess 3D anatomy and surrounding bone.
• Evaluation under a dental operating microscope to improve visualization of tiny canals and cracks.
• Assessment of restorability, including the condition of existing fillings, crowns, and posts.

🛠️ Treatment Options

Nonsurgical Root Canal Retreatment
We carefully reopen the tooth, remove old filling material, disinfect and shape the canals, and seal them again. Modern techniques — including ultrasonic tools, irrigant activation, and bioceramic sealers — can aid cleaning and sealing. A new well‑sealed restoration is placed or coordinated with your dentist.

Apicoectomy (Endodontic Microsurgery)
When retreatment is not feasible or has limited potential benefit (for example, when a post cannot be safely removed or the restoration should not be disturbed), microsurgery may be considered. Through a small incision, the tip of the root and surrounding inflamed tissue are removed, the canal end is cleaned and sealed (often with a bioceramic material), and the area is sutured.

📈 Which Option Comes First?

In many cases, retreatment is considered first if the tooth is restorable and access is possible. Microsurgery may be appropriate when the existing restoration should remain undisturbed, when an obstruction blocks canal access, or when a well‑treated canal shows persistent apical inflammation. Final decisions are individualized after imaging and a clinical exam.

🧯 Risks, Recovery, and Follow‑Up

• Expect mild soreness for a few days; use over‑the‑counter pain relief as directed unless your doctor advises otherwise.
• Avoid chewing on the treated side until your dentist confirms the permanent restoration is sealed and comfortable.
• Antibiotics are prescribed only when clinically indicated (e.g., spreading infection or systemic signs).
• Contact us promptly for significant swelling, fever, or worsening pain.

🛡️ Protecting the Result

• Obtain a timely, well‑sealed permanent restoration; back teeth often benefit from a protective crown for long‑term strength.
• Address grinding or clenching with a nightguard if recommended.
• Maintain regular dental visits and daily home care to reduce reinfection risk.

👩‍⚕️ How Precision MicroEndodontics Helps

Using an operating microscope and, when appropriate, CBCT, Dr. Eun Young Lee evaluates whether retreatment, microsurgery, or another approach best fits your situation. Our goal is to relieve symptoms and preserve function when feasible, while clearly explaining benefits, risks, and alternatives.

ℹ️ Important Note

This page is for general education and does not diagnose your condition or guarantee outcomes. Recommendations depend on your imaging, symptoms, and overall restorability. We’ll review options together so you can make an informed decision.