The principle of fractional laser

　　The dot matrix laser is processed by lasers and image generators to obtain dozens to hundreds of dot matrix laser beams.

　　The diameter of these dot-matrix lasers is very small, similar to the thickness of hair, ranging from tens to hundreds of microns when acting on the skin, it will have an effect on the surface and inside of the skin.

　　Fractional laser cosmetology is minimally invasive, which means there is a certain amount of trauma.

　　Fractional laser acts on the skin, which will produce a micro thermal damage zone (MTZ for short), and the tissue around the damage zone is intact, so in the process of tissue repair, it can continuously provide living cells to supplement the past, ensuring the repair of skin damage.

　　Fractional laser has certain trauma, but just like empty rice transplanting, the area of micro-thermal damage generally does not exceed 40%, so these small damages can be repaired quickly.

　　【Skin responses to fractional photothermolysis】

　　Fractional lasers are mainly divided into two categories, one is vaporized (also called nonablative) fractional lasers, and the other is vaporized (also called ablative) fractional lasers.

　　The so-called peeling can actually be understood as crusting and moulting, just like peeling off the eggshell to get a tender and smooth boiled egg.

　　Common exfoliation-type lattice lasers include CO2 lasers and erbium lasers.

　　Common non-ablative lattice lasers include erbium glass lasers and neodymium-doped yttrium aluminum garnet lasers.

　　So what can a fractional laser do? In fact, the skin problems that the two types of fractional lasers can solve are roughly the same.

　　Exfoliative fractional laser is mainly used to exfoliate the epidermis and part of the dermis, activate fibroblasts, form new collagen and elastin fibers, and reshape and tighten the skin.

　　【Ablative fractional lasers( CO2 and Er: YAG) :a randomized controlled double-blind split-face trial of the treatment of periorbital rhytides】

　　The non-exfoliative fractional laser produces small thermal damage in the epidermis and dermis, which stimulates tissues, forms thermal damage, and promotes collagen remodeling and elastic tissue formation.

　　【Evaluating facial pores and skin texture after low-energy nonablative fractional 1440-nm laser treatments】

　　Therefore, compared with the non-ablative lattice laser, the ablative lattice laser has higher intensity, deeper action depth, and relatively better effect.

　　However, it is precisely because of the different intensity of the thermal effect that the exfoliative fractional laser is more painful and traumatic than the non-exfoliated fractional laser.

　　In addition to the obvious redness and pain, the exfoliation fractional laser also has very significant skin scabs; although the non-exfoliation fractional laser may also cause skin redness, swelling and pain, there is generally no process of scab molting.

　　What kind of problems can the dot matrix laser solve?

　　Fractional laser can peel off the aging and bad epidermis, and promote epidermal regeneration, collagen fiber synthesis, collagen remodeling, so as to reduce wrinkles, tighten skin, shrink pores, improve skin quality, etc., in order to achieve the purpose of beauty and skin rejuvenation; but what you need to pay attention to is that people with skin infections, acne, recent tanning, skin barrier damage, tissue disease, and pregnant and breastfeeding women, should carefully choose the fractional laser treatment and beauty items, and must follow the doctor's advice.

　　Fractional laser is a special, dense beam type laser, which can stimulate skin collagen regeneration and remodeling by generating thermal effects inside the skin, and can improve acne, scars, enlarged pores, wrinkles, sagging skin and other problems.

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