Tooth Regeneration Center
When a root-treated tooth becomes painful or infected again, retreatment may still save it. Our specialists reopen the tooth and re-clean canal systems that are fine, curved and easy to miss.
Final treatment plan, cost and duration are confirmed after in-clinic diagnosis.
Root canal retreatment removes the old filling material from a previously treated tooth, re-cleans and disinfects the canal system, then seals it again to stop reinfection. It is considered when pain or infection returns after a root canal — often because fine or curved canals were missed, or because the tooth was never protected with a crown. At Today Dental Clinic in Gangnam (Seoul) and Bucheon, board-certified specialists review each case together and recommend retreatment only when saving the tooth is realistic.
Who it fits
Process
We take X-rays and examine the tooth to locate the source of infection, then judge whether retreatment can realistically save it. If extraction is the more sensible option, we will tell you so before any treatment begins.
The existing root filling — and the crown or filling above it, when necessary — is carefully removed so the specialist can reach the full canal system again.
Canal anatomy is often fine, curved and branched, which is why infection can persist after a first treatment. Each canal is located, cleaned and disinfected individually. Depending on how stubborn the infection is, this stage may take more than one visit.
Once the canals are clean, they are filled and sealed along their full length. A root-treated tooth is brittle, so a crown is placed to keep bacteria out — skipping this step is one of the most common reasons root canals fail in the first place.
Care system
Board-certified specialists from different fields review difficult retreatment cases together, in a university-hospital style of collaborative care, before any treatment plan is proposed.
Our philosophy is to preserve natural teeth and avoid overtreatment. Retreatment is recommended only when keeping the tooth is realistic, using safety-certified materials and a strict hygiene system.
Patient stories
2024.07.24
Pre-treatment radiograph: the fine, curved canal anatomy is mapped before re-cleaning begins.
2024.08.29
Post-treatment radiograph: the canals have been re-cleaned and densely filled along their full length.
Final treatment plan, cost and duration are confirmed after in-clinic diagnosis.
FAQ
Two causes are especially common. First, canal systems are often fine, curved and branched, and a missed or incompletely cleaned canal lets infection persist. Second, many patients skip the crown after a root canal because the pain has settled — but without that seal, bacteria can re-enter the canals and the infection returns.
Sometimes, but not always — and we will be honest about it. Straightforward cases may be completed in a small number of closely scheduled visits, while stubborn infections need time to settle between appointments and cannot be safely rushed. The final crown may also require a separate visit. Share your travel dates at the consultation stage and we will tell you what is realistic before you commit.
No. If the tooth is badly cracked, severely decayed below the gum or has lost too much supporting bone, retreatment may not give it a meaningful future, and extraction followed by an implant discussion may be the better path. Our specialists assess this honestly and explain both options, including their limits, before you decide.
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