Treatment for a Failed Root Canal in East Finchley

A root canal succeeds when infection is removed and the tooth is sealed. Failures can appear months or years later for several reasons. Sometimes hidden or curved canals were missed during the initial treatment. Delays in placing the final crown can let new bacteria enter. New decay around the filling or crown can bring infection, or rarely a fracture in the root can cause problems. We use a high‑magnification dental microscope to find and treat these hidden issues, giving your tooth the best chance of survival. The retreatment success rate is high, typically 75 to 90 percent.

Seek assessment if you notice symptoms in a tooth previously treated. The most common sign is persistent or recurring pain, ranging from a dull ache to sharp pain when biting. Other indicators include tenderness or swelling in the gums near the treated tooth, or a pimple like bump on the gum. Sometimes there is no pain, but an infection shows on a routine dental x‑ray. If you have these issues in East Finchley or North London, we offer same‑day assessments during office hours to determine the cause and discuss options.

This is the most common approach. First, we take a 3D CBCT scan during a 60‑minute consultation to map the tooth’s root structure. The retreatment usually takes 90‑120 minutes. We numb the area fully before accessing the tooth. Next, we remove the original filling, crown, and any posts. Then, using a dental operating microscope for enhanced vision, we clean and disinfect the canals, looking for missed anatomy. Finally, we refill and seal the canals and place a temporary filling. You return to your general dentist for a permanent crown to protect the tooth. A patient from Highgate recently had this procedure on a molar where a tiny fourth canal was missed initially; the retreatment was a success and he is pain-free.

If non-surgical retreatment is not practical or successful, an apicoectomy offers a way to save the tooth. This small surgery opens the gum to reach the root tip, removes the infected portion, and seals the end of the root. It is often suggested when infection persists despite retreatment. We recently did an apicoectomy for a patient in East Finchley whose canal was blocked, preventing full retreatment. The procedure saved a front tooth that might have required extraction and an implant.

Recovery after non-surgical retreatment is similar to the original procedure. For the first 2 to 4 days you may have mild to moderate tenderness, easily managed with over‑the‑counter pain relief. Avoid chewing on the treated tooth until the crown is placed. Recovery after an apicoectomy involves more care, with minor swelling and bruising for a few days. We provide aftercare instructions and ask you to follow them for proper healing. Red flags requiring immediate contact: call our practice during office hours if you have severe, increasing pain after day 4, significant swelling that spreads, or a fever above 38 C. Out of hours, visit your nearest A&E or call NHS 111.

While our aim is to save the natural tooth, retreatment may not be the best option. The main alternative is extraction. After removal, the gap should be filled to prevent movement of surrounding teeth and to restore function. The two primary replacement options are: A Dental Implant: a titanium post in the jawbone with a crown on top. It is durable and natural feeling, starting from £2,500 plus the crown. A Fixed Bridge: uses the teeth on either side of the gap as anchors for a false tooth. It is often faster than an implant but requires grinding down healthy adjacent teeth. We will discuss the pros and cons of each option based on your clinical situation and long‑term goals.

To make an informed choice about your treatment, here are important questions to ask any provider, whether it is us or another practice in North London: What is your success rate with retreatment? Do you use a dental microscope and 3D CBCT scanning for these procedures? What are the specific reasons my first root canal failed? What are the full costs involved, including the consultation, scan, and treatment? How much experience do you have with complex retreatments or apicoectomy? What are the risks if you do nothing? Will I need a new crown afterwards, and is that included in the fee?

The cost depends on the case complexity, such as which tooth is affected and whether it is non-surgical retreatment or an apicoectomy. A full, clear quote is provided after the initial consultation and 3D CBCT scan. The fee covers all endodontic work at our practice with no hidden charges. The cost of the final crown, placed by your general dentist, is separate. We are a private practice and do not offer NHS services. We accept several private plans, including Max Bupa, Denplan, and Cigna, and can help with the necessary paperwork.