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Maguok Station Dental Clinic_“When the depth of a crack differs, the treatment changes too!” [3. Tooth Crack (Fracture) Treatment]

Seoul DIA Dental Clinic · 서울디아치과의원 · December 12, 2025

Hello. We explain what you need clearly, with minimal burden. This is Seoul Dia Dental Clinic at Magok Station. ​ In the previous post, we explained “the symptoms that appear when...

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 DIA Dental Clinic

Original post date: December 12, 2025

Translated at: April 20, 2026 at 1:47 PM

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

Hello.

We explain what you need clearly, with minimal burden.

This is Seoul Dia Dental Clinic at Magok Station.

In the previous post,

we explained “the symptoms that appear when a tooth has a crack.”

We also covered why a tiny, invisible crack

can cause a sharp jolt with cold water, a sting when chewing,

and a dull ache when lying down.

If you haven’t seen Part 2 yet,

please review it quickly below.

Now, the topic of Part 3 is very clear.

“How does treatment change depending on the depth of a tooth crack?”

Cracks start out as thin as a hair,

but if the timing for treatment is missed, the scope of treatment can grow exponentially.

So today,

from early craze lines to deep cracks and root fractures,

we’ll guide you very easily through how treatment changes at each stage,

in the style of Seoul Dia Dental Clinic at Magok Station.

Guide to Tooth Crack (Fracture) Treatment

We’ve organized, stage by stage, “what treatment is needed” in a very easy way.

1st stage: surface craze line (Craze Line)

→ A stage where ‘management’ is more important than treatment

Maguok Station Dental Clinic_“When the depth of a crack differs, the treatment changes too!” [3. Tooth Crack (Fracture) Treatment] image 1

Magok Station Dental Clinic_Surface microcrack

At this stage, it is literally

a very thin craze line that forms only on the outer surface of the tooth (enamel).

There is almost no pain, and there are no functional problems.

But that doesn’t mean you can be careless.

Because hard foods, teeth grinding, and stress can overlap,

surface craze lines can gradually deepen.

So at this stage,

  • Be careful with hard foods

  • Wear a night guard to help prevent grinding and clenching

  • Check for progression through regular examinations

These three things are the key.

Stage 2: Early crack

→ A stage where it is sealed with resin or an inlay

Maguok Station Dental Clinic_“When the depth of a crack differs, the treatment changes too!” [3. Tooth Crack (Fracture) Treatment] image 2

Magok Station Dental Clinic_Early crack

From this stage,

localized sensitivity

and a brief sharp pain when chewing may begin.

The crack is not yet deep,

but because there is microscopic movement inside the tooth,

it sends a signal that “something is there.”

There are two treatment directions at this point.

① If it is early, reinforce with resin

Maguok Station Dental Clinic_“When the depth of a crack differs, the treatment changes too!” [3. Tooth Crack (Fracture) Treatment] image 3

Magok Station Dental Clinic_Resin reinforcement

There is almost no tooth reduction, and the burden is minimal.

However, if the crack gets deeper, it will no longer hold up,

so think of this as a treatment that is possible in the early stage.

② If it has progressed a bit more, use an inlay

Maguok Station Dental Clinic_“When the depth of a crack differs, the treatment changes too!” [3. Tooth Crack (Fracture) Treatment] image 4

Magok Station Dental Clinic_Inlay

With an inlay, the area around the crack is cleaned up and wrapped with a strong material

so that chewing force is not concentrated in one place.

Stage 3: Moderate crack

A crown (porcelain/zirconia) is essential

Maguok Station Dental Clinic_“When the depth of a crack differs, the treatment changes too!” [3. Tooth Crack (Fracture) Treatment] image 5

Magok Station Dental Clinic_Moderate crack

This is the stage that patients find most confusing.

On the outside, the tooth looks fine and remains intact,

but it hurts heavily when chewing

and there is a subtle discomfort that lasts throughout the day.

At this point, the crack has reached the dentin (the inner tissue).

Because the tooth slightly opens and closes with every bite,

the movement causes pain,

and if left untreated, it will gradually deepen.

Maguok Station Dental Clinic_“When the depth of a crack differs, the treatment changes too!” [3. Tooth Crack (Fracture) Treatment] image 6

Magok Station Dental Clinic_Crown

So the most appropriate treatment is a crown (full coverage).

It binds the entire tooth together as one unit

and helps prevent it from progressing to a deeper fracture.

Simply put,

this is the stage where “it now needs to be secured and protected to prevent a bigger problem.”

Stage 4: The crack has reached the nerve

→ Root canal treatment + crown are definitely necessary

Maguok Station Dental Clinic_“When the depth of a crack differs, the treatment changes too!” [3. Tooth Crack (Fracture) Treatment] image 7

Magok Station Dental Clinic_Crack reaching the nerve

At this stage, the pain pattern changes clearly.

When the tooth touches cold or hot food, it is no longer just a “momentary” pain;

there is lingering throbbing pain even after eating,

and pain often gets worse when lying down or at night.

This is a sign that the crack has reached the nerve

and inflammation has begun.

Maguok Station Dental Clinic_“When the depth of a crack differs, the treatment changes too!” [3. Tooth Crack (Fracture) Treatment] image 8

Magok Station Dental Clinic_Crown after root canal treatment

In this case,

the treatment requires two steps:

root canal treatment to address the inflammation

and a crown to protect the entire tooth.

Stage 5: Root fracture stage

→ A stage where extraction should be considered

Maguok Station Dental Clinic_“When the depth of a crack differs, the treatment changes too!” [3. Tooth Crack (Fracture) Treatment] image 9

Magok Station Dental Clinic_Crack extending to the root

At this stage, the crack has reached the very bottom of the tooth,

that is, the root.

Instead of a sharp “sting” when chewing,

there may be twisting pain,

pain only when chewing in a certain direction,

or gum swelling and pus, so it must be distinguished from periodontitis.

The problem is,

teeth with cracks that have reached the root are quite difficult to save.

Even if a crown is placed, the crack in the root continues to expand.

Maguok Station Dental Clinic_“When the depth of a crack differs, the treatment changes too!” [3. Tooth Crack (Fracture) Treatment] image 10

Magok Station Dental Clinic_Bridge, implant

So at this stage, after extraction,

it often leads to an implant or a bridge.

If we summarize the treatment by stage:

Stage 1: Only a craze line → Management is enough

Stage 2: Early crack → Reinforce force with resin or inlay

Stage 3: Moderate crack → Protect the entire tooth with a crown

Stage 4: Reaches the nerve → Root canal treatment + crown

Stage 5: Root fracture → High likelihood of extraction

The biggest problem with tooth cracks is that they are not easy to see with the eye.

That is why “interpretation ability” matters more than equipment.

Maguok Station Dental Clinic_“When the depth of a crack differs, the treatment changes too!” [3. Tooth Crack (Fracture) Treatment] image 11

Seoul Dia Dental Clinic at Magok Station

Seoul Dia Dental Clinic at Magok Station

checks the internal structure with 3D CT,

finds hidden cracks with microcrack scans,

and analyzes the bite (force balance)

to track even the cause of why the crack formed.

That is why even a tooth crack that looks fine on the outside

can still be found with, “Ah, there it is.”

If you feel even the slightest sensitivity or sharp pain,

checking it once is the fastest way to protect a tooth.

In Part 4, which will be posted tomorrow,

we will summarize the problems that occur when a tooth crack is left untreated.

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

[ Magok Station Seoul Dia Dental Clinic Tooth Crack (Fracture) Series ]

  1. Why teeth crack

  2. Symptoms that appear when a tooth cracks

  3. Treatment by crack/fracture extent

  4. Problems that occur when a cracked tooth is left untreated

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