With the continuous development of plastic and cosmetic technology, it is also pursuing minimally invasive, simulation and traceless. Laser has become an important part of traceless in the field of cosmetic medicine. It has the characteristics that other ordinary light does not have, especially in the treatment of various pigmented diseases.
1、 Tattoo therapy for melanosis
There are professional tattoos and non professional tattoos, which are caused by placing foreign pigments in the dermis for decorative, cosmetic or medical purposes, or are a consequence of trauma (explosive tattoos). The treatment is to use a Q-switched laser with high energy to make tattoo ink particles rapidly expand and crush without damaging the surrounding skin. Ink fragments are then eliminated by phagocytosis of macrophages, transport of lymphatic vessels and / or expulsion through the epidermis. After laser treatment, the skin turns white immediately without bloody exudation. After 7 ~ 10 days, the scab peeled off without pigment and scar. It takes 3 to 5 times to completely cure the darker nevus, blue, green and red tattoos, OTA nevus, etc., with an interval of about 2 months. The overall effect is still satisfactory, but there are also more laser treatments.
2、 Vascular disease
Skin vascular disease is the most common disease treated by laser at present. The selective photothermal decomposition principle makes the laser treatment no longer limited to the skin vascular disease of adults, but gradually began to be applied to infants and young children, and the scar after treatment is not obvious.
3、 Treating scar
Argon laser is one of the earliest laser types used in the treatment of hypertrophic scar and keloid. It is believed that it can coagulate capillaries, cause local tissue hypoxia, and with glycolysis, produce lactic acid, reduce the pH value of local tissue, resulting in the release of enzymes (including collagenase) and granulolysis. The release of collagenase leads to the dissolution of collagen and the softening and flattening of hypertrophic scar tissue. This indicates that the efficacy of laser therapy is the direct result of collagenase release in tissues, and may also be related to the reduction of D2 macroglobulin (collagenase inhibitor).
4、 Used to treat face aging
In recent years, lasers have been widely used in plastic surgery for premature facial aging and excessive skin wrinkles. Among them, carbon dioxide laser is one of the most widely used types. The new generation of carbon dioxide laser is made based on the principle of photothermal decomposition. The difference from the older generation of CW CO2 laser is that it has a fast pulse. It mainly acts on the skin epidermis and the superficial dermis, vaporizes and removes the original wrinkled skin on the face, denatures the thin collagen fiber band in the superficial dermis, regenerates a relatively flat epidermis, and replaces the denatured collagen fiber with the new collagen fiber, so as to tighten the skin, remove small wrinkles, increase the elasticity and luster of the skin, and prevent other cells unrelated to treatment from being damaged. Skin care should be given for about 3 weeks before treatment. After operation, the skin should be protected from sun exposure, and the skin care should continue to be maintained until complete healing.
Laser has a wide range of clinical applications in cosmetic surgery. As a new subject, laser science is one of the major achievements in the field of medical cosmetology.