METHODS: A single-center retrospective cohort study was carried out using a high-power triple wavelength diode laser (810, 940, and 1060 nm), with a 2.7 cm2 spot size, on faces with thin and less pigmented hair. The study comprised 23 subjects with Fitzpatrick skin types IV and V. Effectiveness was measured by counting the hairs that appeared in high-resolution photos taken prior to and following the procedure, in addition to the Global Aesthetic Improvement Scale (GAIS). Furthermore, mathematical 3D simulations were created on the COMSOL Multiphysics® software to allow for comparisons to be made with regard to thermal damage sustained by the hair follicles and epidermal heating. Assessments were also made in relation to side effects.
RESULTS: An average of 66% hair reduction was observed. Patient satisfaction was between 4 and 5 points on the GAIS scale, indicating that the treatment was very well received and tolerated. Adverse side effects were not observed.
CONCLUSIONS: It can be concluded that the use of a high-power triple wavelength diode laser (810, 940, and 1060 nm) is safe and effective for the treatment of very fine and less pigmented facial hair on Asian skin. Furthermore, a triple wavelength (810, 940, and 1060 nm) laser is absorbed less by the melanin in the skin, enabling the use of higher fluences in stamping mode, with greater efficacy and safety for darker skin.
方法:使用高功率三波长二极管激光器(810、940和1060nm)进行了单中心回顾性队列研究,具有2.7cm2的光斑尺寸,在头发薄而色素少的脸上。该研究包括23名FitzpatrickIV型和V型皮肤受试者。通过计算在手术之前和之后拍摄的高分辨率照片中出现的毛发来测量有效性。除了全球美学改善量表(GAIS)。此外,在COMSOLMultiphysics®软件上创建了数学3D模拟,以便对毛囊和表皮加热造成的热损伤进行比较。还对副作用进行了评估。
结果:观察到平均66%的毛发减少。患者满意度在GAIS量表上为4至5分,表明该治疗非常受欢迎和耐受。未观察到不良副作用。
结论:可以得出结论,使用高功率三波长二极管激光器(810、940和1060nm)可以安全有效地治疗亚洲皮肤上非常精细和色素沉着较少的面部毛发。此外,三波长(810、940和1060nm)激光被皮肤中的黑色素吸收较少,能够在冲压模式中使用更高的通量,对深色皮肤具有更大的功效和安全性。