Mokgok Station Dental Clinic_ “Why Does It Tingle If It Looks Fine?” [1. Why Cracks Form in Teeth ]

Hello.

Straight answers when you need them, with minimal burden

This is Seoul Dia Dental Clinic at Magok Station.

These days, orthopedic clinics are especially busy.

Once you slip on icy roads, your lower back, wrists, ankles... everything can get thrown out of balance. But in fact, dental clinics also see more patients in winter for a similar reason.

When you fall and hit the area around your mouth with a thud, your front teeth can break or chip, leading you straight to the dentist. But there is an even more common problem.

On the surface, everything looks fine, but inside, a hairline crack may have formed.

It may not be a clean break, but you may still think, “Why is it so sensitive...?” “What is this sharp pain only when I bite...?”

Even while feeling these signs, many people just brush them off and think, “It’ll probably be okay, right?”

However, cracks do not heal on their own over time, and they tend to get deeper, so understanding them early is extremely important.

Mokgok Station Dental Clinic_ Fine cracks in teeth

So at Seoul Dia Dental Clinic at Magok Station, we prepared a special winter-preparation series.

In today’s Part 1, we’ll take a close look at the fundamental reason: “Why do teeth crack even apart from trauma?”

Now then, let’s go step by step through the real reasons tooth cracks form, in the style of Seoul Dia Dental Clinic at Magok Station.

Why do tooth cracks form?

Even if the outside looks fine, the inside may be different.

Most tooth cracks start as very small hairline fractures.

They may be hard to see with the naked eye, but they often progress deep enough to irritate the nerve.

The five main reasons cracks form are below.

1. Winter slips and impact accidents

Mokgok Station Dental Clinic_ Slip and fall accident

When you fall on a slippery floor, you often clench your jaw unconsciously or hit your face or mouth area.

Even if there is no visible sign of damage, the tiny impact from that moment can be transmitted into the tooth, making small cracks more likely to form.

This is especially common in the front teeth, canines, and the edges of molars.

2. Hard foods

Mokgok Station Dental Clinic_ Biting ice

Hard nuts, dried squid, ice

These foods place a sudden, strong pressure on the teeth.

When a sharp impact is applied with a “snap,” internal hairline cracks can form even if the tooth looks fine on the outside.

3. Teeth grinding and clenching habits

Mokgok Station Dental Clinic_ Teeth grinding during sleep

Teeth grinding and clenching, even when unintentional, create a force of hundreds of kilograms on average each day, causing the teeth to rub and grind against each other.

Especially when stress is high or sleep quality is poor, this happens more strongly without you noticing, so it is a very common cause of cracks.

4. Old amalgam, resin, inlay, and crown treatment areas

Mokgok Station Dental Clinic_ Cracks around an old amalgam area

A tooth is originally one solid structure, but after treatment, it becomes a structure made of both restorative material and natural tooth. The problem is that these two materials have different properties.

Old resin wears down and gaps form, and force enters through those gaps, making cracks more likely. Inlays may also look fine on the outside, but hairline cracks often grow inside. This is why you cannot feel fully reassured just by how it looks.

5. Bite alignment imbalance

Mokgok Station Dental Clinic_ Bite imbalance

When force is concentrated on just one tooth, that tooth becomes overloaded and cracks before the others.

Typical examples include chewing on only one side, bite changes before and after orthodontic treatment, and the force from wisdom teeth pushing nearby teeth.

6. Natural wear due to age and years of use

Mokgok Station Dental Clinic_ Tooth cracks caused by aging

Teeth also have a “lifespan.” After being chewed on 2,000 to 3,000 times a day for decades, it is more than enough for cracks to develop.

Especially after the age of 40, teeth become drier and their strength gradually decreases, so the rate of hairline cracks rises.

Today’s key summary

1. Winter slip-and-fall accidents commonly lead to tooth cracks
2. Hard foods, teeth grinding, and old treatment areas are major causes
3. Even if the outside looks fine, internal hairline cracks can still form
4. Sharp pain when biting or a sudden zing of sensitivity are warning signs of tooth cracks
5. The earlier they are found, the smaller the treatment scope

Cracks in teeth are more dangerous because they are not obvious on the outside, and the earlier they are caught, the more the treatment scope can be reduced.

Seoul Dia Dental Clinic at Magok Station

Seoul Dia Dental Clinic at Magok Station checks the inside thoroughly with 3D CT, uncovers hidden cracks with microscopic crack scans, and analyzes bite patterns to track the flow of force. In other words, we can quickly find tooth cracks that do not show on the surface.^^

Since even small impacts can have bigger effects in winter, if anything feels even slightly off, it may be a good idea to get a light checkup.

In Part 2, we’ll explain in more detail the symptoms that appear when a tooth has cracked, using everyday-life examples.

This has been Seoul Dia Dental Clinic at Magok Station. Please be careful on icy winter roads—again, and again!

[ 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 about surgery (procedure) after sufficient consultation with a skilled medical professional. ]

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

1. Why teeth crack

2. Symptoms that appear when a tooth has cracked

3. Treatment by crack/fracture extent

4. Problems caused by leaving a cracked tooth untreated