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Seolleung Cavity Treatment: Root Canal Therapy, the Last Resort for Saving a Tooth

Claire Dental Clinic · 선릉역치과 클레어치과|라미네이트·치아미백 전문 · May 27, 2026

Previous image Next image Tooth decay is one of the common oral diseases that many people experience at least once. ​ However, because it is so common, it is easy to take it lightl...

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: Claire Dental Clinic

Original post date: May 27, 2026

Translated at: August 17, 2026 at 5:54 PM

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

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Tooth decay is

one of the common oral diseases

that many people experience at least once.

However, because it is so common,

it is easy to take it lightly.

In particular, early tooth decay may not be easily visible

or may progress without any noticeable pain,

so it is not uncommon for people to miss the right time for treatment.

Then, at some point, they may experience sensitivity when eating cold foods

or discomfort when chewing.

In severe cases, it can lead to throbbing pain at night,

prompting them to visit the dentist only after the condition has progressed.

Because tooth decay does not naturally heal

as time passes,

it is important to detect and manage it early.

If tooth decay is left untreated for a long time,

inflammation may spread to the nerve inside the tooth,

making root canal therapy or crown treatment necessary.

Today, for those considering Seolleung cavity treatment,

we will take a detailed look at

the process of root canal therapy

and the importance of care after treatment.

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Root canal therapy is needed

when tooth decay becomes deep!

Tooth decay is a condition in which the tooth is damaged

by acids produced when bacteria in the mouth

break down sugars in food.

Plaque and food particles can easily remain

in areas that are not brushed properly.

If this environment persists,

the tooth surface may gradually weaken,

and tooth decay may begin.

Although teeth appear hard,

nerve and blood vessel tissue is present inside them.

Tooth decay begins in the enamel,

the outermost layer of the tooth,

and gradually progresses inward.

As the decay becomes deeper,

it can progress more quickly,

so early detection and treatment are important.

At this point, many people may think,

“Isn’t it okay if it doesn’t hurt?”

However, in its early stages,

tooth decay often progresses without noticeable pain,

so detection may be delayed.

As tooth decay deepens,

inflammation may spread through the dentin and toward the nerve.

From this point onward,

it becomes difficult to improve the condition with simple cavity treatment alone.

In particular, if the infection spreads to the nerve,

symptoms such as severe pain, swelling,

or discomfort when chewing may occur.

Therefore, rather than waiting until the pain becomes severe,

it may be necessary to have the current condition examined.

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How is root canal therapy performed?

Root canal therapy is a treatment process that removes

damaged or infected nerve tissue

and cleans the inside of the tooth.

It is not a treatment that necessarily involves extracting the tooth.

Rather, it can be considered one of the treatments performed

to preserve the natural tooth.

Root canal therapy is performed through the following steps.

01 Removal of decay and infected tissue

The areas damaged by decay are removed,

and the condition inside the tooth is examined.

02 Removal and disinfection of nerve tissue

Inflamed nerve tissue is removed,

and the internal canals of the tooth are cleaned.

The inside of the tooth is then repeatedly rinsed and disinfected

to reduce the bacteria and inflammatory material remaining inside.

03 Internal filling and sealing

The empty internal space is filled

with dental filling material

and carefully sealed.

04 Crown restoration

Because a tooth that has undergone root canal therapy

may become weaker,

crown restoration may also be performed

to protect it from chewing forces.

However, the number of appointments and the treatment process

may vary depending on the condition of the tooth.

If the area of inflammation is extensive,

additional care may be necessary,

so it is important to be aware of this.

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Care after root canal therapy is also important

Root canal therapy removes inflammation from inside the tooth

as part of the process of preserving the natural tooth.

However, completing treatment does not mean

that the tooth completely returns to its original condition.

In particular, because the internal tissue has been removed

from a tooth that has undergone root canal therapy,

it may be weaker than before,

making care after treatment important.

✓ Avoid hard or chewy foods

Immediately after treatment, the tooth may be weaker than usual.

Forcefully chewing hard or chewy foods

such as ice, nuts, or squid

may increase the risk of tooth fracture.

✓ Be careful not to dislodge temporary material

Root canal therapy is not always completed in a single appointment

and may require several visits.

Therefore, care should be taken

so that the temporary material used during treatment

does not come loose.

✓ Complete treatment with a crown

It is important to complete treatment with a crown,

which can protect the tooth,

restore chewing function,

and improve its appearance.

✓ Brush thoroughly and use oral care aids

Even after root canal therapy, tooth decay can recur,

so it is advisable to carefully clean

the margins of the restoration and the spaces between the teeth.

✓ Receive regular checkups

Even when there are no noticeable external symptoms after root canal therapy,

the internal condition should be checked regularly.

Because inflammation may recur in some cases,

consistent care is important.

In addition, the area around the tooth may feel temporarily sensitive

immediately after treatment,

and mild discomfort may occur when chewing.

However, if severe pain continues over time

or gum swelling or pus repeatedly occurs,

another examination may be necessary.

If you are considering Seolleung cavity treatment,

rather than focusing only on whether pain is present,

it is important to first accurately assess

the current condition of the tooth.

If even minor sensitivity or discomfort recurs,

do not leave it untreated.

It is advisable to have a dental examination.

Consistent care and regular checkups

can be important for maintaining healthy teeth

for a long time.

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