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Gangnam Teeth Whitening: Naturally Restoring Yellowed Teeth

LUCID Dental Clinic · 루시드치과 · August 13, 2025

​ Hello. This is Lucid Dental Clinic. The color of our teeth is not fixed from birth. ​ It changes little by little depending on the growth process, lifestyle habits, and the passa...

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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: LUCID Dental Clinic

Original post date: August 13, 2025

Translated at: April 20, 2026 at 3:23 PM

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

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Hello. This is Lucid Dental Clinic.

The color of our teeth is not fixed

from birth.

It changes little by little depending on the growth process,

lifestyle habits,

and the passage of time. Although it is not visible, on the surface of the teeth, tiny residues from food pigments

and more accumulate every day, and the enamel

gradually penetrates inward.

At first, the discoloration is so slight that it is difficult to distinguish with the naked eye,

but after years pass, the teeth lose their original bright color

and become yellowish or brownish.

This color change cannot be solved simply by

brushing more thoroughly.

Especially when drinks and food, smoking, and aging act together,

staining substances settle deep inside the teeth,

and it progresses to a level

that can only be removed at a dental clinic.

Lucid Dental Clinic’s teeth whitening is not simply about

making the surface white, but is carried out with a customized approach suited to the cause and

depth of the discoloration.

In this article, we will explain step by step from the reasons tooth discoloration occurs,

to how Lucid Dental Clinic restores the natural color,

and the secrets to maintaining the effect for a long time after treatment.

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Why teeth turn yellow

Tooth discoloration occurs for a variety of reasons,

and it cannot be completely

prevented simply by brushing diligently.

  1. Aging

As we get older, the enamel gradually becomes thinner,

and the color of the underlying dentin shows through more strongly, making the teeth appear yellow.

In addition, pigment buildup accumulated over a long period becomes fixed

to the tooth surface, causing the natural white color to be lost.

  1. Smoking

Tar and nicotine in cigarettes are

typical causes of tooth staining. The longer the smoking period, the more the pigments

penetrate deep into the enamel, making them difficult to remove with simple cleaning.

  1. Food and beverage habits

Foods with strong pigments such as coffee, black tea, green tea, red wine, and curry can leave pigments on the tooth surface when consumed repeatedly.

Hot or cold drinks can also create tiny

cracks, making staining progress more easily.

  1. Medication and disease

Some antibiotics, iron supplements, and certain oral diseases can

also cause discoloration.

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Gangnam teeth whitening treatment process

Lucid Dental Clinic’s teeth whitening is carried out after closely analyzing the patient’s condition

and ensuring safety.

  1. Detailed examination

The current color of the teeth, the depth of discoloration, gum condition,

and presence of cavities are comprehensively examined.

Depending on whether the staining is superficial or internal discoloration,

the concentration of the whitening agent and the treatment time will differ.

  1. Application of a protective agent

To prevent the gums from being irritated by the whitening agent,

a protective agent is carefully applied before treatment. This minimizes side effects such as sensitivity or inflammation.

  1. Application of whitening agent and light irradiation

After applying a high-concentration whitening agent to the tooth surface,

a light of a specific wavelength is irradiated to break down pigments.

The energy of the light reacts with the whitening agent to oxidize and break down even the pigments deep inside the teeth.

This process causes almost no pain, and changes can be seen with the naked eye even after one treatment.

  1. Finishing and aftercare

To maintain the effect for a longer time, 2 to 3 additional treatments are recommended.

After treatment, you should avoid pigment-rich foods, and we will guide you to maintain white teeth through a regular care program.

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Advantages of Lucid whitening treatment

  1. Aesthetic satisfaction

It restores the natural color of the teeth, brightens the impression,

and has a positive effect on social interactions and regaining confidence.

  1. Safety

Because it removes only surface pigments without shaving down the teeth,

there is almost no damage to the enamel.

  1. Fast results

Noticeable changes can be seen with just one treatment,

and it is possible to reach the desired shade in a short period of time.

  1. Natural color realization

Because the concentration and time are adjusted to each person’s tooth color,

natural results that do not look artificial can be achieved.

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Recommended candidates for teeth whitening

▪️People who usually feel self-conscious because of tooth discoloration

▪️People who want a perfect finish after orthodontic treatment

▪️People preparing for important events such as employment, interviews, or weddings

▪️People who frequently consume coffee, wine, or black tea, or who have severe staining due to smoking

How to care for your teeth after Gangnam teeth whitening

Post-treatment maintenance after Gangnam teeth whitening is very important

for maintaining the effect.

▪️For 48 hours after treatment, avoid strongly pigmented foods and drinks such as coffee, wine, kimchi, and curry.

▪️Right after whitening, the tooth surface may become sensitive, so reduce the intake of foods that are too hot or too cold.

▪️Use a soft toothbrush, interdental brush, and dental floss 2 to 3 times a day to prevent staining.

▪️For smokers, quitting smoking greatly helps maintain whitening.

▪️Prevent discoloration in advance through regular scaling and dental checkups.

Q&A about teeth whitening

Q. How long does the whitening effect last?

A. On average, it lasts about 1 to 2 years, but it varies depending on lifestyle habits.

It can be maintained for a long time through periodic retouch treatments.

Q. What is the difference between at-home whitening and in-clinic whitening?

A. Home-use whitening uses a low-concentration whitening agent, so the effect is slower and more limited.

Whitening performed at a dental clinic uses high-concentration agents and professional equipment to provide a stronger and more stable effect in a short period of time.

Q. Is there any pain during the procedure?

A. In most cases, there is no pain, but people with sensitive teeth may experience temporary sensitivity.

This usually subsides within a day.

Lucid Dental Clinic’s teeth whitening is not simply about creating 'white teeth';

it prioritizes the patient’s dental health and safety,

so you can expect natural and long-lasting results.

If you want to regain the confidence to smile brightly at important moments,

we recommend getting a consultation at Lucid Dental Clinic now.

Lucid Dental Clinic will support your transformation.

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Lucid Dental Clinic 3rd–4th floors, Coway Building, 606 Nonhyeon-ro, Gangnam-gu, Seoul

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