Teeth Whitening Guide / Cost, Results, and Comparison with DIY Whitening / Gangnam Leon Dental Clinic

Hello, this is Gangnam Leon Dental Clinic🙂

Bright, clean teeth can

have a considerable impact on a first impression.

However, as time passes during everyday life,

teeth can naturally become stained.

As tooth color gradually changes in this way,

many people begin considering teeth whitening.

Especially before important events such as

weddings, job interviews, and profile photo shoots.

Does DIY whitening really work?

How long does teeth whitening last?

How much does it cost?

In this post, we have organized everything you may be curious about,

including the causes of tooth staining,

the differences between professional teeth whitening and DIY whitening,

cost and results, the treatment process,

and frequently asked questions.

🔖Teeth Whitening Summary

1️⃣Causes of staining

2️⃣Professional teeth whitening vs. DIY whitening

3️⃣Cost of teeth whitening

4️⃣Teeth whitening process

5️⃣Teeth whitening results and side effects

6️⃣FAQ

Causes of Tooth Staining

:Why Teeth Turn Yellow

The causes of yellowing teeth

are broadly divided into extrinsic and intrinsic factors.

✅Extrinsic Staining

This refers to staining that occurs

when pigments accumulate on the tooth surface (enamel).

It is the most common type

and is closely related to lifestyle habits.

• Food and beverages -

Coffee, green tea, black tea, wine,

curry, cola, and so on

• Smoking -

Tar and nicotine in cigarettes

can cause staining on the tooth surface.

✅Intrinsic Staining

This refers to staining or discoloration

that occurs inside the tooth (the dentin or during tooth formation).

• Aging -

As people age, the enamel gradually becomes thinner,

exposing the color of the underlying dentin

and making the teeth appear yellowish.

• Medication and trauma -

In some cases, the color inside a tooth may change

due to certain medications or dental trauma.

In such cases, fundamental dental treatment,

rather than general whitening, is necessary.

Professional Teeth Whitening

vs. DIY Whitening

Which method is better

depends on the condition of your teeth and the results you want.

✅Professional Teeth Whitening

A high-concentration whitening agent is used at the dental clinic,

followed by light exposure to accelerate the effect.

Because the condition of the teeth and gums is checked before treatment,

a treatment plan can be developed based on the individual’s condition.

✅DIY Teeth Whitening

Common options include whitening toothpaste, whitening strips,

and whitening gels.

Because instructions and results vary by product,

it is important to carefully check the instructions

before use.

Professional Teeth Whitening	Category	DIY Teeth Whitening
High-concentration whitening agent + light exposure	Treatment	Whitening toothpaste, whitening gel, etc.
Relatively rapid changes can be expected	Results	Very gradual
Performed after a dental examination	Safety	Follow the product instructions
Approximately 1–3 sessions (individual differences); 20–40 minutes per session	Time required	Several days to several weeks
Can last from several months to more than 2 years depending on lifestyle habits	Duration	Varies depending on the product and care
Relatively high	Cost	Affordable
For those who want rapid changes	Recommended for	Managing mild staining

Cost of Professional Teeth Whitening

The cost of teeth whitening

varies depending on the treatment method, dental clinic, and type of product.

Therefore, rather than choosing based solely on cost,

it is a good idea to consider the following factors as well.

The general cost is approximately KRW 100,000–300,000 per session,

and you may also choose to receive treatment

with a price benefit during a promotional period.

✔️Current degree of tooth discoloration

✔️Desired brightness

✔️Duration of the results

Teeth Whitening Process

Professional teeth whitening

usually proceeds as follows.

① Oral Examination and Consultation

We examine whether the teeth are in a condition suitable for whitening,

including cavities, gum disease, tooth wear, and the presence of restorations.

We also discuss the desired tooth color

and expected results.

② Checking Tooth Color

The current color of the teeth is measured and recorded

before treatment.

This allows an objective comparison

of how much brighter the teeth have become after treatment.

③ Scaling When Necessary

If tartar or surface staining is severe,

scaling is performed first.

Cleaning the tooth surface thoroughly

helps the whitening agent act more evenly.

④ Gum Protection

A protective agent is applied

to prevent the high-concentration whitening agent from contacting the gums.

This can help reduce gum irritation and discomfort.

⑤ Applying the Whitening Agent

A whitening agent containing hydrogen peroxide

or carbamide peroxide is applied to the tooth surface.

The whitening agent breaks down pigments inside the teeth,

helping them appear brighter.

⑥ Light-Activated LED Whitening Device

A special light source is used

to accelerate the whitening reaction.

⑦ Removing the Whitening Agent and Checking the Color

After the designated time has passed, the whitening agent is removed

and the teeth are cleaned thoroughly.

The degree of whitening is then checked

by comparing the color with that before treatment.

⑧ Post-Treatment Care Instructions

For 24–48 hours after treatment,

it is best to avoid dark-colored foods such as coffee, wine, and curry

and to avoid smoking whenever possible.

Following the care instructions provided by the dental clinic

can also help maintain the whitening results for longer.

Teeth Whitening Results and Duration

The results are greatly affected by the individual’s tooth condition

and lifestyle habits.

The following habits

can help maintain the whitening results.

Depending on lifestyle habits,

the results may last from several months to more than two years.

✔️Reduce consumption of foods that cause staining

✔️Reduce smoking

✔️Get regular scaling

✔️Brush your teeth properly

✔️Follow the dental clinic’s recommended care methods

Side Effects and

Precautions for Teeth Whitening

Although teeth whitening is a relatively common treatment,

some people may experience the following symptoms.

✅Tooth Sensitivity

This is the most commonly reported symptom

and is usually temporary, improving over time.

✅ Gum Irritation

Contact between the whitening agent and the gums

may cause irritation.

✅ Restorations Do Not Change Color

Crowns, laminates, composite resin, and similar restorations

do not whiten like natural teeth,

so consultation is necessary before treatment.

✅ Precautions After Treatment

The 24–48 hours after treatment

are an especially important period during which the whitening agent

stabilizes on the teeth.

It is best to avoid staining foods whenever possible.

Teeth Whitening FAQ

✋How many teeth whitening sessions are needed?

The number of sessions required may vary

depending on the original tooth color, the cause of staining,

the condition of the teeth, and lifestyle habits.

Treatment is often performed in approximately three sessions.

In this case, one or two sessions are performed on the same day,

and the remaining session is performed

about seven days later.

✋My teeth are sensitive after whitening.

Temporary sensitivity may occur after whitening,

but if there is pain or it persists for a long time,

it is necessary to check whether there were pre-existing issues

such as tooth cracks, cavities, gum recession,

or tooth sensitivity.

In general, these factors are checked

through an examination before whitening treatment.

✋Can professional teeth whitening and DIY whitening

be performed together?

Combining DIY whitening

with professional teeth whitening

may improve the whitening results and how long they last.

For mild staining, gradual DIY whitening

along with lifestyle management may be helpful,

but if you want rapid changes and need a professional examination,

you may wish to consider professional teeth whitening.

Post-treatment care habits

have a significant effect on maintaining the whitening results.

Reducing foods that cause staining and smoking,

along with regular oral care,

can be helpful.

If you have any other questions about teeth whitening,

please feel free to leave a comment.

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