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What follows once the pain goes away by itself · Seongmo Dental Clinic, Sungshin Women’s University Station · Board-certified specialist in Integrated Dentistry
💡 The short answer. Pain disappearing on its own is not healing. The nerve dies, the pain stops with it, and the infection travels down to the root tip and dissolves bone.
The longer it is put off, the more visits and cost it takes, and abscess at the root tip or a cracked tooth can end in extraction.
Seongmo Dental Clinic checks these stages on CBCT to judge whether the tooth can still be saved.
Contents
The pain in a tooth that needs a root canal arises because the nerve is swollen with inflammation.
If that inflammation continues, the nerve eventually dies, and a dead nerve does not hurt.
Pain disappearing is not recovery but the signal that the nerve has lost sensation.
Meanwhile the bacteria multiply inside the canal, feeding on the dead tissue, and there is only one place for them to go: the root tip.
The higher the stage, the longer the disinfection period, and a tooth that has lost a lot of bone can sometimes not be saved even by retreatment or apicoectomy.
No. Antibiotics reach tissue through the bloodstream, and there is no blood flow inside a canal containing a dead nerve.
Antibiotics can settle gum swelling for a while, but the bacteria inside the canal remain and it recurs.
The only way to remove the source is to open the canal, disinfect it and seal it.
It is the state rather than the time. Three things determine extraction. First, a hollow tooth splitting lengthwise under chewing force — a tooth whose nerve has died has less moisture and breaks easily, and once the split reaches the root nothing can save it.
Second, so much bone lost at the root tip that the tooth is mobile. Third, decay having progressed until no tooth structure remains for a crown to hold.
Short of those three, months of delay still leave a chance. Seongmo Dental Clinic checks cracks and bone on CBCT and saves what can be saved.
The criteria between retreatment and extraction are set out in retreatment or extraction.
Coming in at stage 1 often allows sealing on the same day, and Seongmo Dental Clinic makes the crown in-house on the day of sealing to reduce visits.
Even from stage 3, we first look at saving the tooth by strengthening canal disinfection with Plazen plasma.
If pain during treatment is the worry, it is done under painless anaesthesia with a computer-controlled device, so there is no need to delay for that reason.
The process is on the root canal treatment page, and the normal range of pain after treatment in is pain after a root canal normal.
Now, while it does not hurt, is the best time to treat it. 30 seconds on foot from Exit 2 of Sungshin Women’s University Station, +82-2-922-3966.
Does delaying a root canal cost more?
It does. Once inflammation appears at the root tip the number of disinfection visits rises, and if bone dissolves or the tooth cracks it moves to extraction and an implant, several times the cost.
If the pain has gone, has the nerve died?
For a tooth already diagnosed as needing a root canal, that is likely. A dead nerve does not hurt, but the bacteria inside the canal keep multiplying.
A pimple-like spot appeared on my gum — is that the nerve?
It is most likely a sinus tract, where pus from the root tip discharges through the gum. Even without pain it means stage 3 or 4, so it needs to be checked.
I delayed for months — can it still be saved?
If the root is not split lengthwise and bone loss is not extensive, there is still a chance. Seongmo Dental Clinic confirms on CBCT and looks at saving it first.
Related information
Seongmo Dental Clinic opened in 1998. I have held this position as the third director since April 2022, and I have one standard for choosing equipment: if I would not use it on my own family, I do not use it on my patients.
One more scanner must not mean more treatment. If anything, it should mean cutting less, extracting less and finishing in one visit, from a more accurate original.
The goal is not to be first with new equipment, but to offer the better of what is possible today to the patient sitting in the chair.
📍 3rd floor, 2 Dongsomun-ro 20ga-gil, Seongbuk-gu, Seoul
🚉 30-second walk from Exit 2, Sungshin Women’s University Station (Parking: up to 2 hours at Utah Mall)
📞 +82-2-922-3966
📅 Mon/Wed/Fri 09:30–18:30 · Tue 09:30–20:00 (evening clinic) · Sat 09:30–14:30 (no lunch break) · Weekday lunch 13:00–14:30 · Closed Thu, Sun and public holidays
💬 Booking and enquiries: Naver Booking · Naver Talk · KakaoTalk channel · English page
🟡 Opened in 1998; third-generation director in charge of care since April 2022
⚕️ This article was written for information purposes in line with Korean medical law and the Ministry of Health and Welfare’s medical advertising standards.
Equipment specifications given here come from the manufacturer’s official material and the figures on accuracy and comfort are values reported in academic literature; the outcome and course of individual treatment vary with the condition of the mouth.
Please decide on a specific diagnosis and treatment plan after consulting your treating clinician.
This article was written as of August 2026. Equipment specifications and cost-related content are reviewed and updated every three months.
Peer-reviewed sources supporting the explanations above, selected by Dr. Tae-yoon Jang (Director, Seongmo Dental Clinic). Individual results may vary.
