Root canal (endodontics)
Root Canal Retreatment in Da Nang
Reopening, cleaning and resealing a tooth whose earlier root canal has failed or become reinfected — a second chance to keep the natural tooth.
Root canal retreatment is a second course of treatment for a tooth that had a root canal before but has become painful, tender or reinfected. The earlier root filling is removed, the canals are re-cleaned and disinfected, and the tooth is resealed — giving the natural tooth another chance rather than removing it.
At Vinmec Picasso, retreatment is planned inside Vinmec Da Nang International Hospital. Because a failing root canal often involves narrow, curved or previously missed canals, CBCT 3D imaging is frequently used to see the tooth’s anatomy and the source of infection in detail before treatment begins.
Why a root canal can fail
A first treatment may not fully resolve infection if a canal was hard to find or clean, if the seal broke down, or if bacteria returned over time. Retreatment addresses these areas directly. The 3D imaging helps confirm whether the problem can be reached from inside the tooth, or whether a surgical approach such as an apicoectomy would suit better.
Weighing up the options
Retreatment aims to keep your own tooth, which is often the preferred outcome when the tooth can be restored. Where the tooth is cracked or too broken down, extraction and a replacement may be more predictable. Which route is recommended is based on the examination and imaging, and the alternatives are discussed so you can decide with a clear picture.
At a glance
- TreatsA previously treated tooth with persistent or returning infection
- ImagingCBCT 3D imaging is often used
- GoalKeep the natural tooth rather than remove it
- AnesthesiaLocal anesthetic
Is it right for you?
Often recommended when:
- A tooth that had root canal treatment is painful, tender or swollen again
- An X-ray or scan shows infection remaining or returning at the root
- The tooth is worth keeping and can be restored afterwards
May not be the right option when:
- The tooth is cracked or too broken down to restore predictably
- Surgery such as an apicoectomy is a better route for that root
- Extraction and replacement is the more reliable long-term option
Suitability is confirmed only after a clinical examination and CBCT 3D imaging. Alternatives are discussed where they exist.
What the treatment involves
Assessment & CBCT imaging
The tooth is examined and CBCT 3D imaging is often used to see the canals, missed anatomy and the source of infection in detail.
Reopening the tooth
Under local anesthetic, the crown or filling and the previous root filling material are carefully removed.
Re-cleaning & disinfection
The canals are re-cleaned, shaped and disinfected, addressing areas the first treatment may not have reached.
Resealing & restoring
The canals are resealed and the tooth is restored, often with a crown for protection.
Recovery & aftercare
- Some tenderness for a few days is normal and usually eases with standard pain relief.
- Avoid heavy biting on the tooth until the final restoration is complete.
- Follow-up reviews check that the infection is settling and the tooth is protected.
Common questions
Why did the first root canal fail?
Is retreatment better than an extraction?
Will I need a new crown?
Related treatments
Next step
Talk to the team about your case
Send an inquiry and a patient coordinator will contact you during clinic hours—in English or Vietnamese—to arrange your consultation and explain what happens next.