Early-stage cavities: 2 reasons they’re not visible to the naked eye

Early-stage cavities

Hello.

I’m Kim Mu-jin, chief director of D-Day Dental Clinic.

Early-stage cavities: 2 reasons they’re not visible to the naked eye image 1

“Cavities are black.” That’s what most people think, right?

But what I want to tell you is this:

By the time a cavity looks black, it is already very late.

The really dangerous cavities are not visible from the outside.

No matter how closely you look in the mirror, they seem fine, and even if you touch them, they feel smooth.

In fact, many patients confidently say, “My teeth are healthy.”

But when we actually take an X-ray, the result is shocking.

The spaces between the teeth are already decayed,

and in some cases, it has progressed to the point where root canal treatment is needed.

Why does this happen?

Today, I’ll explain the two decisive reasons why early cavities are not visible to the naked eye.

If you read this to the end, you’ll clearly understand why regular checkups are so important,

and how to protect your own teeth.


1. Cavities start from inside the tooth2. Interproximal cavities develop hidden

Cavities start from inside the tooth and spread

This is something many people misunderstand.

They think cavities start from the outside of the tooth.

But in reality, it’s completely the opposite.

A tooth is broadly made up of three layers.

The outer white enamel, the inner yellow dentin,

and the innermost pulp area, where the nerves and blood vessels are located.

Early-stage cavities: 2 reasons they’re not visible to the naked eye - D-Day Dental Clinic

A cavity begins when calcium is lost from the surface of the enamel.

At this stage, you can’t see anything from the outside.

At most, it only looks slightly whitened or discolored. Patients naturally don’t notice it.

Early-stage cavities: 2 reasons they’re not visible to the naked eye - D-Day Dental Clinic

But the problem starts here.

Once a tiny hole forms in the enamel, the dentin underneath is much softer than enamel.

When cavity-causing bacteria enter through that tiny hole, they begin quickly eating away at the dentin.

It spreads inward in a triangular shape, as if chopping into wood with an axe.

The outside may look fine, but inside it is already badly decayed.

What’s even more frightening is that even at this stage, there is almost no pain.

Until the enamel layer is completely gone, you may not feel anything.

That’s why patients often go on without knowing, and then one day, while eating something hard, the tooth suddenly breaks apart.

Early-stage cavities: 2 reasons they’re not visible to the naked eye image 4 A patient who visited for treatment of molars Interproximal cavities and secondary cavities in the affected teeth were treated with inlays An old gold crown was replaced with a zirconia crown 2023.02.27

What always feels unfortunate to me while treating patients is exactly this point.

If they had come just a little earlier, a simple filling would have been enough,

but because they came late, there are many cases where root canal treatment and a crown are needed.

Interproximal cavities develop hidden

The second point is interproximal cavities, which occur between the teeth.

Cavities on the chewing surface are at least visible to the naked eye.

You can see a black line or a hole.

But cavities that form between teeth are totally hidden.

No matter how closely you look in the mirror, you can’t see them.

Early-stage cavities: 2 reasons they’re not visible to the naked eye - D-Day Dental Clinic

From the outside, the teeth look completely fine.

Even for me, as a dentist, it is often difficult to identify them with the naked eye alone.

That’s why X-rays are absolutely necessary.

When we take an X-ray, we can clearly see cavities progressing as dark areas between the teeth.

Interproximal cavities have one more characteristic.

They don’t just occur in one place; they often develop in multiple spots at the same time.

If there is a cavity between one pair of teeth, there is a very high chance there is also a cavity between another pair of teeth.

In cases like this, patients sometimes misunderstand.

“Doctor, my teeth look fine, so why do I need so much treatment? Isn’t this overtreatment?”

They say things like that.

Whenever that happens, I show them the X-ray images and explain everything in detail.

D-Day Dental Clinic

When they can see for themselves that it may not be visible on the outside but has actually already progressed quite a bit,

most people say, “Ah, it was that far along,” and understand.

We do not force patients into treatment.

But if a treatment is truly necessary, I honestly tell them that if it is not done now, there could be bigger problems later.

Early cavities are not visible to the naked eye.

They start from inside the tooth, and especially cavities that form between teeth develop completely hidden.

That’s why regular checkups are really important.

If you come to the dental clinic once every six months and check with X-rays, you can detect cavities early.

If detected early, a simple filling is enough.

But if found late, you may need root canal treatment and a crown, which takes much more time and cost.