Cập nhật lần cuối: 16/08/2023.

How Long Does Teeth Whitening Last?

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“How long does teeth whitening last?” This is one of the most concerning questions of customers who want to have dental services, especially teeth whitening. To have a better understanding of this problem, please refer to the following article!


1. For natural methods

Traditional teeth whitening methods such as using salt, lemon, bread crumb, … are usually easy to apply and especially their cost is very cheap.

Therefore, these are the most common teeth whitening methods among people.

But the teeth’ color after applying these methods might not last long. The reason is that these materials can only slightly affect the outside surface of the teeth, so the stains deep inside of the enamel are not cleaned thoroughly.

These natural methods usually give results that only last about 4-5 months. If you take good care of your teeth, it can last up to 8-9 months.

How Long Does Teeth Whitening Last?
How Long Does Teeth Whitening Last?

2. For teeth whitening trays at home

Self-medication and at-home teeth whitening trays are now being used by lots of people. This method can bring much faster teeth whitening effects than natural methods. This method works similarly to that of having teeth whitening at the dentist.

Therefore, this method can give results that can last longer than the natural methods (about 1 – 2 years)

3. How long does teeth whitening at the dentist last?

“How long does teeth whitening teeth at the dentist last?” this is also a big concern of people who want to have teeth whitening.

Teeth whitening at the dentist is one of the most effective methods than can give the longest time keeping the teeth color. Normally, after having teeth whitening at the dentist, the teeth color can last at least 3 years thanks to the Plasma light technology.

After applying the teeth whitening product, the blue light of the Plasma device will activate the whitening product and make it penetrate deeply into the tooth enamel. Thereby making the whitening products destroy all the causes of tooth stains.

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When the tooth enamel no longer has stains, the tooth color can last longer.


1. Regular teeth whitening can damage tooth enamel

Whether the teeth can stay white after teeth whitening depends on the number of times the customer undergoes teeth whitening. Teeth whitening means the procedure of using whitening products to cause a chemical reaction to affect the plaque on the teeth.

The chemicals that cause the protein chain to form plaque are broken, thereby returning the teeth to their original bright white color.

Overusing teeth whitening agents will weaken the enamel and erode the outer enamel layer.

By this time, your teeth will become sensitive, making you feel uncomfortable while eating – talking.

Read more: Sensitivity after teeth whitening

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2. Causing the teeth to be infected with Fluor

Overdoing teeth whitening will also cause enamel to erode. Especially in toothpaste and water will also have an amount of fluoride. Tooth enamel will be eroded due to excessive bleaching (teeth whitening) making fluoride absorb faster and easier.

Therefore, after a period of time, your teeth will be infected with Fluor. The first signs are the white spots on the surface of the teeth. Then it turns yellow, brown, and black, and gradually forms deep holes on the teeth’ surface.

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1. Regular oral hygiene

Daily habits such as brushing, rinsing your mouth with clean water, and flossing… will help you keep your teeth white and healthy.

Besides, the most important habit is brushing your teeth twice a day. You should brush your teeth horizontally, then in a circle direction, this habit can prevent damage to the enamel.

Lots of people are worried about whether they can brush their teeth after having teeth whitening or not. According to experts, after teeth whitening for about 8 hours or more, you can brush your teeth.

How Long Does Teeth Whitening Last?
How Long Does Teeth Whitening Last?

2. Proper diets

In addition to good oral hygiene, diet also greatly affects the teeth whitening results. We need to remember:

Avoid foods that are high in sugar and acids.

– Avoid using tobacco and other stimulants.

– You should not use dark lipstick because it can stick to your teeth.

–  Eat more light-colored foods such as milk, cheese, etc.

Eat foods containing vitamins and fiber to help whiten your teeth. 

3. Regular dental check-ups

Regular dental check-ups not only help us maintain better tooth color but also help doctors detect and treat oral diseases in time.


It is extremely essential to choose a reputable dental center to have teeth whitening. After whitening the teeth at other dental centers, the teeth’ color can last for 3 years. But when you have teeth whitening at Gangwhoo Cosmetic Hospital, customers will no longer be worried about such problems.

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At Gangwhoo Cosmetic Hospital, we apply the most advanced technology to help customers preserve their teeth’ color for more than 5 years. And with our latest teeth whitening technology, the procedure only takes place in 60 minutes. 

Vietnamese - Korean doctors of Gangwhoo Cosmetic Hospital
Vietnamese – Korean doctors of Gangwhoo Cosmetic Hospital


  • Address: 576 – 578 Cong Hoa Street, Ward 13, Tan Binh District, Ho Chi Minh City, Vietnam
  • Hotline/Zalo: 0901 666 879
  • Email: info@gangwhoo.com
  • Website: gangwhoohospital.vn
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We hope you’ve had enough useful information about how long teeth whitening lasts. If you have any further questions or concerns, please leave a comment below, contact Gangwhoo Cosmetic Hospital, or via our Hotline: 0901.666.879 for the most thoughtful advice and guidance from our dental specialists!

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