Teeth Whitening–How Does LED Light Whiten Teeth?

teeth whitening

We are always agonizing when finding the yellower teeth in the mirror, especially sped up by the modern lifestyles such as drinking or smoking. Many people are aware of this problem and looking for teeth whitening methods to restore their pearly whites. However, professional teeth whitening such as In-office teeth whitening or going to dentist are very expensive, although the they work well.

More and more people are now choosing to treat themselves in the comfort of their own home with LED tooth whitening kits. To help you decide when LED teeth whitening is right for you, we will discuss how LED teeth whitening can whiten teeth.

teeth whitening

Principles Of Teeth Whitening

In general teeth whitening works by treating the teeth with an agent which may or may not be bleach-based. Then, to speed up the reaction, a blue light source is shone on the treated teeth. In the past, Ultra Violet (UV) light has widely been used as the light source. However, there are now concerns over the risks of using UV light. UV light is a form of ionizing radiation which can cause the mutation of cells and potentially cancer. This is of particular concern in the mouth because the oral tissues are very sensitive.

How Does LED Light Make Teeth Whiter?

LED light works alongside a tooth-whitening agent. The light will not change the color of your teeth if used alone. However, it acts as a catalyst to speed up the reactions when used with a whitening agent. The agent is commonly hydrogen peroxide or carbamide peroxide, which are both active ingredients. Carbamide peroxide, for example, is a slow-acting bleach that when applied to teeth will react, breaking down into hydrogen peroxide and urea. Urea is a waste product, but the hydrogen peroxide removes superficial stains and deeper discoloration by altering their chemical structure.

  teeth whitening

Is LED Tooth Whitening Safe?

LED tooth whitening has been developed to be safe for home use. The use of an LED light source as opposed to older, UV light sources is much safer. However, bear in mind that it involves putting bleach into your mouth, so it is important to follow the instructions which are specific to each different kit.

Teeth Whitening LED Light Side Effects


You may find that your teeth temporarily become more sensitive after LED teeth whitening. This is usually not permanent, and you can look after your teeth by using toothpaste for sensitive teeth.

Gum Irritation

If the whitening agent comes into contact with the delicate tissues of the mouth such as the tongue or gums, the tissues may become irritated. Cell turnover in the mouth is quick, so the irritations will not usually last long.

Damage From Overuse

Repeated tooth whitening in quick succession, using too much whitening agent or leaving the agent on for too long can all cause permanent damage to the teeth. This can be prevented by understanding the instructions of the kit and following them carefully.

teeth whitening

Benefits Of LED Teeth Whitening


Many at-home LED teeth whitening kits can be bought for under $100, making it much more affordable than in-office teeth whitening at your dentist. While it may not last as long, at-home kits can still give great results.


There are plenty of at-home teeth whitening kits that you buy to use at home in your own time. This means you can use it as a touch up for a last-minute arrangement, without waiting for an appointment time.


At-home teeth whitening kits can be extremely successful when used correctly. They are easy to use and come with comprehensive instructions to help you. You can often see results straight away, and they should last a while.

No UV Radiation

The use of LED light as a catalyst instead of UV light, which has been previously used, is much safer. Unlike UV light, LED cannot cause mutations as it does not affect tissue on a cellular level.

teeth whitening