Both photon hair removal and laser hair removal are based on the principle of selective photothermolysis. The use of melanocytes in the hair follicle to absorb light in a specific wavelength band causes the hair follicle to be heated, thereby selectively destroying the hair follicle while avoiding damage to surrounding tissues. Permanently removes hair.
Because of the same principle of hair removal, it is easy for beauty seekers to confuse the difference between the two, or to confuse them, or to listen to partial beliefs, and to have doubts when choosing the best hair removal method for them. As the only two permanent hair removal methods, what is the difference between photon hair removal and laser hair removal? The following is a professional point of view to explain the difference between the two, want to do hair removal beauty, how to choose, naturally have a few.
1, hair removal parameters
Photon hair removal uses strong pulsed light with an incoherent wavelength of 590-1200 nm. The filter can be adjusted according to the skin color and hair color of the patient. The most commonly used band is 695-1200 nm. The pulse width, number of pulses, cooling time, and energy density are adjustable to make the application more perfect.
Laser hair removal uses a single-wavelength coherent wave laser. According to its development process, it is divided into ruby laser (wavelength 694nm), alexandrite gem laser (755nm), Nd: YAG laser (1064nm) and a semiconductor laser (810nm). The laser hair removal device is a wavelength 810 nm semiconductor laser known as the hair removal gold standard.
2, hair removal equipment
Photon hair removal instrument is mainly the American medical doctor IPL Quantum photon hair removal instrument.
The most advanced laser hair removal device is the Lighsheer vacuum depilatory device of the American medical practitioners and the Israeli Felton ice point depilation instrument, all using an 810nm semiconductor laser.
Other hair removal devices that use ruby lasers and amethyst gemstone lasers have been eliminated due to poor hair removal and large side effects.
3, the best indication
The 590nm-1200nm wavelength pulsed light used for photon hair removal can be used to depilate patients with hair color and skin color. This feature is especially suitable for yellow human skin. The yellow skin color is mostly Fitzpatrick III-V type (white is I-III). Type), close to the color of the upper lip and limbs, has a good indication for congenital hirsutism.
The early ruby laser is mostly used for hair removal of light-skinned black hair. It is not suitable for the treatment of patients with type III-V. Because the penetration depth is insufficient, it can only be used in the areas where the depth of the hair follicle is relatively shallow, such as the upper lip and the ankle.
The 810 nm wavelength used in semiconductor lasers is considered to be the gold standard for hair removal, but the effect on fine light-colored hair (gold, gray, white) is still not ideal, and for dark-skinned patients, it is necessary to reduce energy to ensure no damage to the skin.
4, treatment experience
Including pain during treatment and hair removal rate.
Pain is related to hair density, skin tone, and therapeutic energy density. Regardless of photons or lasers, cooling devices are routinely placed on the treatment head to relieve pain. When the photon is depilated, a 4°C cold gel is applied to the surface of the skin to further reduce pain and reduce complications.
The rate of hair removal depends on the size of the treatment head and the frequency of treatment. The photon hair removal adopts a 10mm*45mm treatment head, which is larger than the conventional 6-10mm treatment head of the laser, but the frequency is lower than that of the laser. In combination, the hair removal speed is equivalent. Photon hair removal is easier to align with the treatment area to avoid duplication with a shorter treatment frequency.
5, treatment effect
The hair removal effect is related to hair thickness, hair color, skin color, energy density, and hirsutism. Light-colored fine hair, dark skin, and idiopathic hirsutism are all unfavorable factors that affect the hair removal effect.
The therapeutic band of photon hair removal is better for patients with close hair color and skin color; the effect of laser on light skin and black hair is the same as that of photons, but the effect on dark skin is lighter, especially in early days. Ruby / amethyst gemstone laser.
6, complications / side effects
Side effects of hair removal include early erythema and root edema in the skin, usually disappearing within a few days after treatment;
A shallow blister-like burn can cause hyperpigmentation, especially in the absence of good UV protection. Pigmentation often takes more than half a year to resolve; a small number of people may have skin pigmentation.
The early ruby/azure jade laser was very prone to these complications when it was done on dark skin (Fitzpatrick III-V). Semiconductor lasers can effectively reduce complications by reducing the therapeutic energy density.
The photon hair removal pulse is variable and can completely control the thermal relaxation time of the epidermis and hair follicles, ensuring the safety of the treatment. At the same time, since the bands used for photon hair removal and photorejuvenation overlap, the skin rejuvenation effect is obtained when the hair is removed, so that the skin after depilation is smoother.