AI-translated archive post

[Retreatment of Root Canal Therapy] Pus is coming out of a tooth that had root canal treatment 6 months ago.

Seoul Jeseng Dental Clinic · 신촌 치아지킴희 전준희 · June 10, 2025

​ ​ ​ Hello. ​ I’m Director Jeon Jun-hee from Cheajuimhee in Sinchon. ​ As a specialist in conservative dentistry, ​ the treatments I perform most often in the clinic are ​ root ca...

AI translation notice

This page is an English translation of a Korean Naver Blog archive entry. For exact wording and source context, verify against the Korean archive original and the original Naver post.

Clinic: Seoul Jeseng Dental Clinic

Original post date: June 10, 2025

Translated at: April 20, 2026 at 4:16 PM

Medical note: This translation does not guarantee medical accuracy or suitability for treatment decisions.

[Retreatment of Root Canal Therapy] Pus is coming out of a tooth that had root canal treatment 6 months ago. image 1

[Retreatment of Root Canal Therapy] Pus is coming out of a tooth that had root canal treatment 6 months ago. image 2

Hello.

I’m Director Jeon Jun-hee from Cheajuimhee in Sinchon.

As a specialist in conservative dentistry,

the treatments I perform most often in the clinic are

root canal treatment and retreatment of root canal therapy.

Root canal treatment is

a procedure performed as a last resort to preserve a tooth

when severe damage has occurred to the tooth due to decay or fracture,

or when severe tooth pain develops to the point that it interferes with daily life.

Because once it is started it cannot be reversed,

it is a procedure that must be decided on and carried out carefully.

oRetreatment of root canal therapy is

a treatment option to consider when there is a problem with a previous root canal treatment.

Simply put,

it can be understood as the process of removing the traces of the previous treatment

and sealing the tooth thoroughly and cleanly.

[Retreatment of Root Canal Therapy] Pus is coming out of a tooth that had root canal treatment 6 months ago. image 3 20250127

This is a man in his 30s who came to see me earlier this year.

Overall, his oral care status is excellent.

He said he had received root canal treatment on a lower right tooth

just 6 months earlier.

It had not hurt in the meantime,

but one day he noticed a pus-filled swelling protruding from his gums.

[Retreatment of Root Canal Therapy] Pus is coming out of a tooth that had root canal treatment 6 months ago. image 4 20250127

Let’s check the current condition.

A dark inflammatory pocket is visible at the root tip.

[Retreatment of Root Canal Therapy] Pus is coming out of a tooth that had root canal treatment 6 months ago. image 5 20250127

The gums are also very swollen.

Swollen gums are not necessarily painful.

Because the swelling creates space inside,

the pressure that stretches the tissues is relieved,

so many patients say that it does not hurt as much, or even does not hurt at all.

You should never think, “It doesn’t hurt, so it must be fine.”

In fact, when there is no pain, the actual size of the inflammation can be larger than when there is pain.

Our patient, who visited the dentist quickly despite having no pain,

made a wise decision.

[Retreatment of Root Canal Therapy] Pus is coming out of a tooth that had root canal treatment 6 months ago. image 6 20250127

We take a CT scan.

As expected,

a black empty space is observed at the root tip.

It is evidence that bone has been resorbed due to inflammatory material.

[Retreatment of Root Canal Therapy] Pus is coming out of a tooth that had root canal treatment 6 months ago. image 7 20250201

Retreatment of root canal therapy was started.

By cleaning the inside of the tooth thoroughly,

the cause of the inflammation is removed.

The swelling in the gums quickly improves.

[Retreatment of Root Canal Therapy] Pus is coming out of a tooth that had root canal treatment 6 months ago. image 8 20250329

We repeated the process of cleaning and disinfecting the inside of the tooth several times.

It took about two months to complete the root canal treatment.

[Retreatment of Root Canal Therapy] Pus is coming out of a tooth that had root canal treatment 6 months ago. image 9

[Retreatment of Root Canal Therapy] Pus is coming out of a tooth that had root canal treatment 6 months ago. image 10

(Left) Before retreatment of root canal therapy (Right) After retreatment of root canal therapy (20240329)

Inside the black shadow hanging on at the root tip,

we can observe new bone gradually regenerating.

[Retreatment of Root Canal Therapy] Pus is coming out of a tooth that had root canal treatment 6 months ago. image 11 20250412

The finishing touch for root canal treatment or retreatment is always a strong crown.

It resists chewing force and protects the tooth tightly with a double-lock seal.

I would like to once again thank the patient for taking time out of his valuable weekends each time

and working together to protect his dental health.

#Retreatment of Root Canal Therapy #DirectorJeonJun-heeCheajuimhee #SpecialistInConservativeDentistry #MicroscopeRootCanalTreatment

Continue browsing

Keep exploring this clinic's public source trail

Return to the source archive for more translated posts, or open the Korean clinic profile to compare other public channels.