Fractional laser is not a new laser instrument, but a working mode of laser
The lattice laser is not a new laser instrument, but a working mode of the laser. As long as the diameter of the laser beam (spot) is less than 500um, and the laser beam is regularly arranged in a lattice shape, the laser working mode at this time It’s a fractional laser.
The principle of fractional laser treatment is still the principle of selective photothermal action, which is called the principle of fractional photothermal action: the traditional large-scale laser ablation action method is adjusted so that the diameter of the laser beam (spot) is less than 500um, and the laser beam Regularly arranged in a lattice, each point plays a photothermal effect, and there are normal skin cells between the points, which play the role of tissue repair and remodeling.
Carbon dioxide fractional laser to treat scars
The wavelength of the laser is closely related to its effect. The CO2 laser can provide the “best” wavelength. The CO2 fractional laser can cause limited and controllable scar damage, remove part of the scar tissue, damage and inhibit the blood vessels in the scar tissue, and induce fibroblasts. Apoptosis, promote the regeneration and reconstruction of collagen fibers, its peak energy is large, the heat-induced side damage zone is small, the vaporized tissue is precise, the damage to the surrounding tissue is light, and the laser wound can be healed in 3-5 days, resulting in hyperpigmentation or hypopigmentation and other complications It is less likely to be diagnosed with the disease, and improves the disadvantages of large adverse reactions (scar, erythema, long recovery time, etc.) and insignificant curative effect under the laser non-fractional mode, showing that the curative effect of laser treatment of scars is significantly improved, and the risk of infection is low. The advantage of easy postoperative treatment, showing the recovery process from “scar → skin”.
Fractional laser has better immediate and long-term safety and efficacy than ablative Er laser, non-ablative laser and chemical peeling, so carbon dioxide fractional laser is highly regarded for scar treatment.
At present, the indications for carbon dioxide fractional laser treatment of scars are significantly expanded compared with the traditional methods.
Early CO2 laser treatment of scars is mainly suitable for superficial mature scars. At present, the indications for carbon dioxide fractional laser treatment of scars are: ① Treatment of formed superficial scars, hypertrophic scars and mild contracture scars. ②The wound healing process and early application after healing can change the physiological process of wound healing and prevent the scarring of the wound. ③Scar infection, ulcer and chronic ulcer wound, residual burn wound.
Carbon dioxide fractional laser treatment of scars should be treated once every 3 months or more
Carbon dioxide fractional laser treatment of scars should be performed once every 3 months or longer. The principle is: after CO2 fractional laser treatment, it takes a certain time for the wound to heal and repair. In the 3rd month after treatment, the wound tissue structure after treatment returned to a state close to normal tissue. Clinically, it can be seen that the appearance of the wound surface is stable, without redness and discoloration. At this time, it is better to decide again according to the recovery of the wound surface. parameters of treatment to achieve better results. Some scholars perform re-treatment at intervals of 1-2 months. From the perspective of wound healing, there is no problem in wound healing, but in terms of the stability of wound recovery and the feasibility of determining the parameters of re-treatment, it is not as good as interval 3. It is better to treat once a month. In fact, the process of wound repair and tissue remodeling takes longer, and it is better to re-treat at an interval of more than 3 months.
The efficacy of carbon dioxide fractional laser treatment of scars is affected by many factors
The efficacy of carbon dioxide laser treatment for scars is certain, but its efficacy is affected by many factors, and some cases of unsatisfactory treatment may occur, leading some doctors and some patients to doubt its efficacy.
①The effect of laser treatment on scars depends on two aspects: on the one hand, the doctor’s treatment technology and the adoption of a reasonable treatment plan; on the other hand, it is the personal repair ability of the scar patient.
② During the treatment process, a combination of multiple lasers should be selected according to the appearance of the scar, or the same laser should be switched to the treatment head and the treatment parameters adjusted as needed.
③The treatment of wound surface after laser treatment should be strengthened, such as routine application of antibiotic eye ointment and growth factor tube to prevent infection and promote wound healing.
④It is still necessary to choose a personalized treatment plan according to the scar condition, and combine surgery, elastic compression therapy, radiotherapy, intra-scar injection of steroid hormones, silicone gel products and external use of drugs to improve the curative effect, and implement dynamic comprehensive scar prevention and treatment. treat.
Methods to improve the curative effect of carbon dioxide fractional laser treatment of scars
The morphological characteristics of scars are diverse, and appropriate treatment methods need to be selected according to the characteristics of scars.
①The superficial fractional laser mode is used for relatively flat scars, and the deeper fractional laser mode is used for slightly sunken scars.
②Scars that slightly protrude on the skin surface or raised skin around the pits should be combined with the hyperpulse mode and the lattice mode.
③ For the obviously raised scars, artificial fractional laser technology is used, and the depth of laser penetration should be consistent with the thickness of the scar.
④Scars that are obviously sunken or raised, and scars with contracture deformity should be reshaped or thinned by surgical excision first, and then treated with fractional laser after surgery.
⑤Intra-scar injection or external application of triamcinolone acetonide or Deprosone (laser-introduction drug therapy) should be added at the same time of laser treatment for obviously raised scars or scar-prone sites.
⑥ Early prevention of scar hyperplasia can be combined with PDL, 560 nmOPT, 570 nmOPT, 590 nmOPT, etc. to inhibit vascular hyperplasia in scars according to the scar conditions. Combined with comprehensive treatments such as healing-promoting drugs, elastic compression therapy, body radiation therapy, silicone gel products and external use of drugs, dynamic comprehensive treatment for scar prevention and treatment is implemented to improve the curative effect.
Carbon dioxide fractional laser has a remarkable curative effect on scars, and promotes the transformation of scarred skin to normal skin with fewer complications.
Carbon dioxide laser treatment of scars can significantly improve the symptoms and signs of scars, and significantly improve the appearance of scars. Under normal circumstances, the activity of the scar can be improved within a few hours after treatment, the itching sensation of the scar can be improved within a few days, and the color and texture of the scar can be improved after 1-2 months. After repeated treatments, it is expected to return to normal skin or Close to the state of normal skin, early treatment, the effect is better.
The main complications of carbon dioxide fractional laser in the prevention and treatment of scars include short-term erythema, infection, hyperpigmentation, hypopigmentation, local skin itching, and skin necrosis.
In general, carbon dioxide fractional laser is safe and effective in the prevention and treatment of scars, with fewer or milder complications.
Post time: Apr-20-2022
