Maggok Station Dental Clinic_ "Before Getting a Crown, Do I Really Need a Core and Post?" [6. The Need for Reinforcement Treatment After Root Canal Therapy]

Hello,

We are Seoul Dia Dental Clinic, the dental clinic at Exit 3 of Magok Station that is sincere about the details.

The root canal therapy series has now reached its sixth installment. Do you remember the story from the last part, where we said, “If root canal treatment is stopped halfway, it becomes even more dangerous!”? If you missed it, you can review it briefly below first.

Now, shall we move on to today’s topic?

After finishing root canal treatment, many people tend to think, “Oh, so it’s over now.” But when we say, “Let’s build a support structure first before placing the crown,” many people tilt their heads in confusion.

“I understand the crown, but… what are core and post?” “Do I really have to build a support structure too? Is it necessary?”

We hear questions like these all the time. But behind them lies a crucial reason for preserving the tooth for as long as possible.

In fact, finishing root canal treatment means that the inside of the tooth is empty. The infected tissue, nerve, and blood vessels have all been removed, and the area has been disinfected and sealed.

But the problem starts here. A hollow tooth is easy to break. Especially when the cavity is large or much of the crown portion has already been removed, simply placing a crown on top is not enough.

Maggok Station Dental Clinic_Core Post

That is why a solid internal support called a “core” and a “post” that anchors inside the root become necessary.

Today, we’ll explain these two elements one by one: why they are needed, what roles they play, and whether both are always required.

Seoul Dia Dental Clinic will walk you through it step by step. Let’s begin calmly, with accurate information.

What are the roles and necessity of the core and post?

1. Core

Maggok Station Dental Clinic_ Resin Core

A tooth that has completed root canal treatment has a hollow internal structure. What happens if a crown is placed directly on this condition?

It is not much different from putting a roof on a house that is empty inside. Even if it looks fine on the outside, if the center is weak, the whole structure can collapse easily.

That is why a “core” is essential. Simply put, it is the central reinforcement material that fills the empty inside of the tooth again.

Usually, a material with strength similar to resin is used, and the inside of the tooth is firmly filled with a “resin core” method, which is the most common.

Only after this solid center is built can the crown prosthesis placed on top remain stable and last longer without wobbling.

And since core treatment is not covered by insurance, a separate non-covered fee applies. However, because it is a key step that determines the tooth’s lifespan and serves as the “foundation work” for keeping the crown prosthesis in place for a long time, it is best understood as a necessary treatment.

2. Post

Maggok Station Dental Clinic_Post

“Then isn’t the core enough?” This is a very common question in the treatment room.

But depending on the case, it may also be necessary to place a support structure called a “post.”

In particular, if much of the crown portion of the tooth has been removed, or if only the root is barely left, it is often difficult for the core alone to withstand chewing force.

Now, imagine this. If you are building a three-story building, what if the first floor is unstable? The entire building could collapse, right?

So in such cases, a post is placed deep inside the root, the center is reinforced with a core on top of it, and then the treatment is completed by covering it with a crown.

On the other hand, if a large portion of the tooth remains and the root is healthy, a core alone may be enough. But if there is little remaining tooth structure, or if the tooth is likely to break, it is difficult to last long without a post.

Post treatment is also non-covered by insurance. Placing a post accurately deep inside the root requires time, precise technique, and advanced materials. Please think of it not as a simple “extra option,” but as an essential investment for using the tooth for a long time.

Maggok Station Dental Clinic_Apical Resection Surgery

And one more important point! Getting a post does not mean everything is done. Because a post is literally the “final reinforcement,” if a problem occurs, retreatment is almost impossible.

If inflammation develops, surgical treatment such as apicoectomy may be needed, or in severe cases, it may ultimately lead to extraction followed by an implant.

That is why it is important to reinforce properly from the beginning and continue with regular care afterward. How carefully the initial treatment plan was made, and how that tooth is managed going forward, are both very important.

What is today’s key takeaway?

After root canal treatment, the tooth is weakened because the inside is hollow, so a “core” is needed to firmly fill the center, and a “post” is needed to place a support deep in the root.

Especially when a large portion of the tooth has been removed or only the root remains, a post must be placed.

Next time, we’ll return with the final story in the root canal series!

We will clearly explain, in Seoul Dia Dental Clinic’s style, why crown prostheses are necessary.

If you’ve been curious about the final step in prosthetic treatment for using your teeth longer and healthier, be sure to check it out!

Maggok Station Dental Clinic_Dia Dental Clinic

Seoul Dia Dental Clinic at Magok Station

carries out treatment with one belief: “We will save it as long as it can be saved.”

Treatment is not the end; it is the beginning. We’ll see you again in the next part with an even stronger story.

[ This post was written in accordance with the Medical Service Act for the purpose of providing accurate information about dental surgery and procedures. Infection and side effects may occur after surgery, so you should make your decision after sufficient consultation with a skilled medical professional. ]

[ Magok-dong Dia Dental Clinic Root Canal Therapy Series ]

1. Indications for root canal treatment

2. Root canal treatment process

3. Precautions after root canal treatment

4. Precautions after crown prosthetic treatment

5. Why root canal treatment should not be stopped halfway

6. Why core and post are necessary

7. Why crown prosthesis is needed after root canal treatment