Pain on biting or pressure
Tenderness when you chew or tap on the tooth, months or years after treatment, often means inflammation around the root tip.
When a root canal fails
Root Canal Retreatment in Dubai: Treating a Failed Root Canal
A tooth that hurts, swells or shows infection years after its root canal can often still be kept. Retreatment removes the old filling, finds what was missed and seals the canals again.
- Microscope-assisted retreatment
- 3D CBCT where the case needs it
- Written plan, including the crown
The assessment includes radiographs and, where needed, a 3D scan, so you know why the tooth failed before deciding anything.
Quick answer
What is root canal retreatment?
Root canal retreatment is a second root canal on a tooth that has already been treated but has become painful or infected again. The dentist removes the old crown or filling and the root filling material, looks for missed or poorly cleaned canals, disinfects the root system and seals it again. At Creative Arts in Dubai, retreatment is carried out with a dental microscope and is followed by a new restoration to protect the tooth.
27 yearsIn-house dental laboratory in the same building
Written planItemised treatment plan before you commit
Open daily10:00–20:00, seven days a week
Jumeirah 3614 Jumeira St, Umm Suqeim 1, Dubai
Warning signs
What are the signs of a failing root canal?
A root-treated tooth has no living nerve, so problems show up in the bone and gum around the root. Some failures cause no symptoms and are first seen on an X-ray.
A gum boil or bad taste
A small pimple on the gum beside the tooth, sometimes with a salty taste, is a persistent infection finding a way out.
Swelling in the gum or face
Swelling near the tooth needs prompt attention. Swelling with difficulty breathing or swallowing needs a hospital emergency department immediately.
A dark area on the X-ray
A shadow at the root tip that is new, or has not healed since treatment, can indicate infection even when the tooth feels fine.
A lost or leaking crown or filling
A broken, loose or decayed restoration lets bacteria reach the root filling — worth checking before pain starts.
Causes
Why do root canals fail?
The cause decides whether retreatment makes sense.
| Cause | What happens | What usually follows |
|---|---|---|
| Missed or untreated canal | Molars often have an extra, narrow canal; if it was not found, bacteria remain inside. | Retreatment to find and treat it — magnification helps |
| Leakage from the top | A lost temporary, a crown that never followed or a defective filling lets bacteria seep in. | Retreatment, then a well-sealed new restoration |
| New decay | Decay under an old crown or filling reaches the root filling. | Decay removed, retreatment if needed, new crown |
| Incomplete cleaning | Curved or calcified canals were not cleaned or filled to full length. | Retreatment, if the canal can be negotiated |
| Crack or fracture | A crack lets bacteria travel down the tooth; a vertical root fracture usually cannot be repaired. | Depends on the crack; often extraction for a root fracture |
A crack is not always visible on a standard X-ray. See cracked tooth for how cracks are told apart and treated.
Magnification
How does a dental microscope help with retreatment?
Retreatment is largely a search: for a missed canal opening, a crack line, or a canal hidden under old filling material or calcification. These details are tiny and sit deep inside a narrow access cavity. A dental microscope brings magnification and light along the dentist's line of sight, so they are easier to see.
At Creative Arts, Dr. Marina Antoniuk and Dr. Julia carry out root canal treatment and retreatment with a microscope. In practice it helps to:
- find extra or calcified canals that are a common cause of failure in molars;
- remove old root filling material more completely, under direct vision;
- check the canal walls and floor for cracks before more time and cost go into a tooth that cannot be saved.
Where the anatomy is complex or a fracture is suspected, a 3D CBCT scan may be taken first.
The process
How is root canal retreatment done?
Retreatment usually takes more visits than a first root canal; the number depends on the tooth and what is found.
Assessment and imaging
Examination, radiographs and, where needed, a 3D CBCT scan to look for missed canals, bone changes and cracks. You receive a written plan with the options.
First visitAccess through the old restoration
Under local anaesthetic and rubber dam, the crown or filling is removed or opened so the root canals can be reached.
Treatment visitRemoving the old root filling
The previous filling material and any posts are removed, then the canals are explored under the microscope for anything missed.
Treatment visitCleaning and disinfection
The canals are shaped and irrigated. If infection is heavy, medication is placed and the tooth is sealed temporarily between visits.
One or more visitsResealing the canals
Once the canals are clean and dry, they are filled and sealed, and a core or temporary restoration closes the tooth.
Final canal visitNew crown and review
A new crown or restoration protects the tooth. Healing of the bone around the root is checked on follow-up X-rays over the following months.
Afterwards
After retreatment
Will I need a new crown after retreatment?
Usually, yes. The old crown or filling is often removed to reach the canals, and leakage around it may have caused the failure in the first place.
- Molars and premolars generally need a crown, as root-treated back teeth are more prone to splitting under chewing forces.
- Front teeth with most of their structure left may only need a bonded filling.
- Heavily broken-down teeth may need a core, and sometimes a post, before the crown.
Crowns for our patients are made by the Creative Art Dental Lab in the same building. See dental crowns for materials and the process.
Can it be saved?
When is retreatment worth it, and when can the tooth not be saved?
Retreatment only makes sense if the tooth can be sealed and restored afterwards.
Retreatment is often reasonable when
- A missed canal or leaking restoration explains the failure
- Enough sound tooth remains for a new crown
- The gum and bone support around the tooth are healthy
- No crack runs down into the root
- You want to keep your own tooth
Extraction is usually the honest option when
- There is a vertical root fracture — the tooth generally cannot be repaired
- So little tooth is left that a crown cannot be held securely
- Advanced gum disease has destroyed the supporting bone
- The root has perforated in a place that cannot be sealed
Your options
Retreatment, surgery or extraction: how the options compare
The right route depends on why the root canal failed and what is left of the tooth.
| Non-surgical retreatment | Surgical approach (apicoectomy) | Extraction + implant or bridge | |
|---|---|---|---|
| What it involves | Re-entering the tooth, removing the old filling, cleaning and resealing | Treating the root tip through the gum | Removing the tooth, then replacing it |
| Keeps your own tooth | Yes | Yes | No |
| Typical use | Most failures caused by missed canals or leakage | Selected cases where the canal cannot be re-entered, e.g. a post that should not be removed | Root fracture, too little tooth left, or failed previous attempts |
| At Creative Arts | Carried out with a dental microscope | A surgical option some cases are referred for | Extraction, then an implant or bridge |
| Time to finish | Retreatment visits, then the crown | Depends on the referral | Implant: healing of typically 3–6 months before the crown |
For a fuller, balanced comparison of keeping a tooth versus replacing it, read root canal vs implant.
Cost
What affects the cost of root canal retreatment?
Two failed root canals can need very different amounts of work, so there is no fixed price. These factors set the fee; the root canal cost guide explains them in more detail.
- The tooth and its canalsA single-canal front tooth is simpler than a molar with three or four canals.
- What has to come outAn old crown, a post or hard root filling adds time.
- Imaging and visitsA CBCT scan, or medication between visits, is added only where the case needs it.
- The new restorationThe crown or core that follows is listed as a separate item.
Who treats you
Who carries out root canal retreatment here?
Retreatment here is carried out by dentists who use a dental microscope for root canal work. The crown afterwards is made in the in-house laboratory.
Is the tooth swollen or painful now?
Contact the clinic during opening hours (10:00–20:00 daily) and describe your symptoms; see urgent dental care for what to do meanwhile. If you have facial swelling with difficulty breathing or swallowing, go to a hospital emergency department immediately.
Patient questions
Frequently asked questions
Why does my root canal tooth hurt years later?
Usually because bacteria have got back into the root system or were never fully removed. Common reasons are a missed canal, leakage from a lost or broken crown or filling, new decay at the edge of the restoration, or a crack. Pain on biting, a gum boil or swelling are typical signs. An examination with X-rays, and sometimes a 3D scan, shows which of these is the cause.
Is retreatment more painful than the first root canal?
Retreatment is done under local anaesthetic, so during treatment most people feel pressure and vibration rather than pain. Because the tooth already has no living nerve, the main discomfort tends to come from the inflamed area around the root. Tenderness on biting for a few days afterwards is common and is usually managed with over-the-counter pain relief.
How many visits does root canal retreatment take?
Often more than a first root canal. Old filling material and sometimes a post must be removed, and an infected tooth may be treated over two or more visits with medication placed between them. The crown or final restoration follows once the canals are sealed. Your written plan sets out the expected visits for your tooth.
Can a tooth treated at another clinic be retreated here?
Yes. Many retreatment patients had their original root canal elsewhere, sometimes in another country. Bring any previous X-rays or records if you have them; they help show how the tooth was treated. We take new radiographs, and a 3D scan where needed, before recommending anything.
Will antibiotics fix a failed root canal?
No. Antibiotics can help control a spreading infection or swelling for a short time, but they cannot reach bacteria living inside the root canals, so the infection usually returns. Removing the source, by retreatment or extraction, is what resolves it. Antibiotics are prescribed only when the clinical situation calls for them.
What happens if I leave a failed root canal untreated?
A chronic infection at the root tip can slowly destroy surrounding bone or flare up into an abscess. The more bone is lost, the more complex an implant later can become. A failure without symptoms is still worth assessing while the options are open.
Keep exploring
Related treatments
Root canalRoot canal treatmentHow a first root canal works and how many visits it takes.CostRoot canal costWhat sets the fee for treatment, retreatment and the crown.GuideRoot canal vs implantKeeping the tooth or replacing it, compared honestly.ConditionCracked toothCrack types, pain on biting, and when a tooth can be saved.CrownsDental crownsProtecting a root-treated tooth after retreatment.ConditionTooth abscessSigns of infection and what to do now.
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- Address614 Jumeira St, Jumeirah 3, Umm Suqeim 1, Dubai
- Opening hoursClinic open daily, 10:00–20:00
- Phone+971 4 342 4444 · WhatsApp +971 56 677 7537
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