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Geuryodong Dental Expert: Let’s Learn About the Principles of Teeth Whitening and Proper Care Methods.

Yonsei Dagam Dental Clinic · 치과의사 서호연의 행복한 치아 · June 26, 2025

Hello. ​ This is Yonsei Dagam Dental Clinic in Geuryodong. ​ When you look at celebrities’ bright smiles, they somehow seem brighter ​ and create a clean image. ​ Bright teeth actu...

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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: Yonsei Dagam Dental Clinic

Original post date: June 26, 2025

Translated at: April 20, 2026 at 4:37 PM

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

Hello.

This is Yonsei Dagam Dental Clinic in Geuryodong.

When you look at celebrities’ bright smiles,

they somehow seem brighter

and create a clean image.

Bright teeth actually

make the whole face look more lively

and younger,

and lead to a confident smile,

creating a positive first impression

in interpersonal relationships as well.

These days, as self-care has become popular,

there are various products available on the market

that can also be used at home.

Among them, at-home whitening products

are becoming very popular, but

unlike professional whitening,

they contain only a small amount

of whitening ingredients,

so it is difficult to expect the dramatic changes

seen in advertisements.

On the other hand, the professional whitening

we will discuss at Geuryodong Dental Clinic

is performed using a high concentration of whitening agent

under the direct supervision of medical staff.

Interestingly, professional whitening often allows

people with darker teeth

to notice a big change

after just one session.

That is because the more staining substances there are

inside the teeth,

the more room there is

for the whitening agent to work.

To use an analogy from Geuryodong Dental Clinic,

it is similar to how darker-colored clothes

respond better to bleach.

Therefore, people who have usually been

most concerned about their teeth being dark

often see a significant change.

What this shows is that

the degree of change can differ

from person to person.

Process

Before starting teeth whitening,

a basic oral examination,

periodontal care, and tooth polishing are performed.

Geuryodong Dental Expert: Let’s Learn About the Principles of Teeth Whitening and Proper Care Methods. image 1

And the existing tooth color is

accurately measured through a shade guide.

Based on this guide,

Geuryodong Dental Clinic generally aims

for about a two-step improvement in brightness.

If you want them whiter than that,

additional treatment may be performed

at set intervals,

considering the health of the teeth and gums.

First, to protect the gums,

a special protective barrier is built with Dam,

and then a high-concentration whitening agent

is applied to the tooth surface.

At this time, as the material dries,

you may experience sensitivity.

After that, a special light is shone

to enhance the effect of the applied material’s penetration.

This process is repeated twice for 15 minutes each,

for a total of 30 minutes.

Geuryodong Dental Expert: Let’s Learn About the Principles of Teeth Whitening and Proper Care Methods. image 2

Geuryodong Dental Expert: Let’s Learn About the Principles of Teeth Whitening and Proper Care Methods. image 3

Example 1: A4 -> A2 after whitening

Once the procedure is completed, most people

can confirm a change of about two shades brighter.

Geuryodong Dental Expert: Let’s Learn About the Principles of Teeth Whitening and Proper Care Methods. image 4

Geuryodong Dental Expert: Let’s Learn About the Principles of Teeth Whitening and Proper Care Methods. image 5

Example 2: A3 -> A1 after whitening

After the procedure, if proper care

is not maintained,

the lasting effect will decrease accordingly.

Therefore, it is important to follow

the precautions mentioned by

Geuryodong Dental Clinic.

Precautions

✔ Due to sensitivity to the agent,

the teeth may temporarily feel sensitive.

This usually improves naturally

as time passes.

✔ For at least 48 hours after the procedure,

smoking and beverages or foods that may cause staining

must be strictly avoided.

It is best to avoid green tea, coffee, cola, orange juice,

chocolate, wine, and curry.

✔ In some cases, parts of the teeth may turn white

and look unnatural,

which is a temporary phenomenon caused by

different densities in different areas of the same tooth.

After 1–2 weeks, the color will naturally

stabilize into a more even shade.

✔ As time passes after whitening treatment,

it is completely natural for the shade

to gradually return to the original color.

This is due to the foods and drinks

we consume in daily life,

and the natural re-staining process of the teeth.

Therefore, even after whitening is finished,

it is important to thoroughly follow the care methods

mentioned by Geuryodong Dental Clinic,

✔ receive touch-up treatment according to the dentist’s instructions,

or

undergo whitening every 6 months to 1 year

as a way to maintain bright teeth for longer.

Geuryodong Dental Expert: Let’s Learn About the Principles of Teeth Whitening and Proper Care Methods. image 6

In addition to what I’ve explained today,

there is an important fact that many people overlook.

Our teeth are actually

normally closer to yellow than pure white.

This is because the outermost layer of the tooth,

the enamel, is translucent,

and the dentin beneath it naturally has

a yellowish tone.

As we age,

the enamel becomes thinner,

allowing the dentin to show through more clearly,

so teeth appearing more yellow over time

is also part of the natural aging process.

However, if these natural changes

become a psychological burden,

they can be sufficiently improved through

safe and systematic professional treatment.

Beyond simply improving appearance,

it is a meaningful treatment that enhances

confidence and quality of life.

Through proper care and systematic aftercare,

I hope you can maintain a healthy and beautiful smile

for a long time.

This has been Yonsei Dagam Dental Clinic in Geuryodong.

Thank you!

Geuryodong Dental Expert: Let’s Learn About the Principles of Teeth Whitening and Proper Care Methods. image 7

2025.06.25~25.06.25

Geuryodong Dental Expert: Let’s Learn About the Principles of Teeth Whitening and Proper Care Methods. image 8

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