Is Trio Wave Laser More Effective Than Common Single Wave Laser Hair Removal Device?

With the laser technology development, Three wavelengths are emerging on the market for laser hair removal also. What is the different between single wave laser and trio wave laser hair removal device? Is it really much more effective than common single wave laser for hair removal ?

Theory about laser hair removal:

It is based on the principle of selective photo-thermodynamics. By properly adjusting the laser wavelength, energy, and pulse width, the laser can pass through the skin surface to reach the root hair follicle of the hair. The light energy is absorbed and converted into heat energy that destroys the tissue of the hair follicle. The hair loses its ability to regenerate without damaging surrounding tissues, and there is no pain. In addition, laser hair removal takes advantage of the “selective photo-thermal effect” of laser light, irradiating the hair follicle with laser light tuned to a specific wavelength through the epidermis.

The theory emphasizes how to choose the laser with the best wavelength to interact with the target and destroy it with the most suitable energy without causing thermal damage to the surrounding tissues. The key points are as follows:

 

1. “Wavelength” tissue will selectively absorb a certain wavelength of laser, so that specific tissue will be selectively destroyed. In the field of skin lasers, internal tissue targets include melanin, oxyhemoglobin, and hair follicles; external targets are represented by tattoo particles. The absorption coefficient of melanin is roughly inversely proportional to the wavelength. The shorter the wavelength, the better the absorption. Conversely, the absorption coefficient of water is approximately proportional to the wavelength. Oxyheme has three absorption peaks at 418, 542, and 577 nm.

From the pictures you can see that 808 nm wave is standard wave to pass the skin surface to do laser hair removal. So it will be much more accurate to do hair removal.

 

Now there are many supplier adopts 3 wave in same laser device with 755-760nm, 808-810nm and 1060-1064nm, and it is very popular in the market. From the theory, you can see that the 755nm can enter skin surface also similar as 808nm, while 1064nm also pass the similar depth of the skin layer. So when you combine these trio wave, the hair removal effect will be similar but not higher neither lower if the laser output energy are same . In adition, the laser hair removal effect was mainly depend on different factors like wavelength, pulse duration and energy density.

 

2. “Pulse Duration” (Pulse Duration) represents the time that the target tissue is exposed to laser irradiation; and “Thermal Relaxation Time” (Thermal Relaxation Time, TRT) is the time required for the tissue temperature to drop to half of the maximum temperature after the tissue receives laser energy The time is usually proportional to the size of the target organization. In order to reduce the thermal damage of the laser to the surrounding tissue, the “pulse width” must be less than the “thermal relief time” of the target tissue.

 

2. “Energy Density” (Energy Density) represents the energy of laser per unit surface area of the skin, usually expressed in joules per square centimeter (J / cm2).

So if you are consider about which one is better, you should settle each factors are at the same level.

It will depend on the end-user market customer skin type and hair type, for example，

755nm Laser is especially good for very thin hair on white skin people and effective for hairs in anagen and telogen, while 808nm Laser is suitable for black hair on the yellow skin or the light skin; then 1064nm laser is very good for hair removal on dark skin people no matter what kind of hair types.

So the combined wavelength diode laser machine have a wider applicable scope for hair removal treatment.However, considering the hair removal effect, it still needs to think twice.

Any ideas welcome to share with Kelly by whatsapp 0086-13522789042.