Balsan-dong Dentist: Why Should a Root Canal-Treated Tooth Be Covered with a Crown?

Why a Root Canal-Treated Tooth Should Be Covered with a Crown

Hello.

I am Kim Geun-il,

Director of 365서울원탑치과.

Why do I need to have a crown placed

after root canal treatment?

Can't I just use the tooth carefully

without prosthetic treatment?

This is one of the questions

that patients ask very frequently

around the time they finish

the root canal treatment process

at the dental clinic.

Because the pain disappears completely

after root canal treatment,

you may hesitate, wondering whether

you really need to have a significant amount

of tooth structure removed

and pay for an expensive crown.

I also understand that you may feel

financially burdened because

the cost of prosthetic treatment

can increase by several hundred thousand won.

However, except in special cases,

I would say that a crown for a root canal-treated tooth

is not an “option” but a “necessity.”

Today,

I will explain the medical reasons

why crown treatment should be completed

after root canal treatment.

A root canal-treated tooth

is like a “dead tree.”

Inside a tooth, there are not only nerves,

but also fine blood vessels—the dental pulp—

that supply the tooth with moisture and nutrients.

Root canal treatment is a procedure

that completely removes this vascular tissue

along with the infected nerve.

After root canal treatment, the tooth

that once received nutrients and moisture

becomes dry, brittle, and very weak,

like a “dead tree” with all its moisture dried out.

Even from a small impact or minor stimulation,

such as chewing hard food,

the risk of the tooth breaking easily

or splitting in half—tooth cracking and fracture—

increases sharply.

Because a substantial amount of tooth structure has been removed,

it no longer has enough strength to withstand forces on its own.

The fact that root canal treatment was necessary

means that the decay was already very deep,

or that the tooth had fractured extensively

and inflammation had spread to the nerve.

To access the root canals,

a considerable amount of the upper part of the tooth

must be removed.

As a result, the amount of tooth structure

left after treatment is much less

than you may expect.

If a tooth with only a thin shell remaining

is left as it is or simply filled with an inlay,

it may be unable to withstand the strong forces

of chewing and split all the way to the root.

A crown does not simply cover the tooth.

It acts as a “helmet” and “armor,”

firmly encasing the weakened tooth as a whole

so that it does not break.

A Perfect Seal to Prevent Reinfection

Root canal treatment involves removing

the inflammation inside the tooth,

disinfecting it, and filling it

with a special material.

Even if the treatment has been completed successfully,

if the upper part of the tooth is not precisely sealed

with a crown,

saliva and bacteria in the mouth

can penetrate the root canals again

and cause reinfection.

When reinfection occurs,

another pocket of pus may form

in the jawbone around the gums.

Eventually, the root canal treatment

that was completed with difficulty

may have to be performed again,

or, in the worst case, the tooth may need to be extracted.

What Happens If You Leave the Tooth Without a Crown?

Some people occasionally leave their teeth

with temporary filling material

for several months because of treatment costs or time.

1. Tooth Fracture

If the neglected tooth cannot withstand chewing forces

and splits all the way to the root,

it can no longer be saved.

The tooth must then be extracted

and replaced with an implant.

2. Reinfection of the Root Canals

If the temporary filling material wears away

or a gap develops and bacteria enter again,

it can cause gum swelling

and severe recurring pain.

Ultimately, root canal treatment received

to save the tooth

can lead to the unfortunate result of losing it

if a crown is not placed.

Please understand that prosthetic treatment

after root canal treatment is not overtreatment.

It is a necessary step

to protect a tooth that has undergone

difficult treatment.

I, dentist Kim Geun-il,

will continue to do my best

to preserve your valuable natural teeth

and help you use them for as long as possible.

Thank you.

📍 365서울원탑치과의원

4th floor, Dongmyeong M Building, 179 Gangseo-ro,

Gangseo-gu, Seoul

Balsan-dong Dentist / Gangseo-gu Dentist / Hwagok-dong Dentist

A 1-minute walk from Exit 8 of Hwagok Station