Safety and efficacy for hair removal in dark skin types III and IV with a high‐powered, combined wavelength (810, 940 and 1060 nm) diode laser: A single‐site pilot study

Abstract

Background: Previous studies have demonstrated the superior efficacy of a highpower diode laser (4800 W) with a wavelength of 810 nm over others with less power and the same wavelength, while also being safe and comfortable for the patient.However, the use of this laser is limited on dark skin.Objectives: This study aims to compare the efficacy, safety, and comfort of a 4800 W diode laser (810 nm) with that of the new Blend diode laser (810 nm, 940 nm, and 1064 nm). Furthermore, the study aims to demonstrate that the Blend diode laser delivers better results on darker skin.

Triple Wavelength and 810 nm Diode Lasers for Hair Removal: A Clinical and <i>in Silico</i> Comparative Study on Indian Skin

“…These results are consistent with those presented in the studies by Fajardo et al [13] and Gold et al [15] where the Primelase device with the triple-wavelength diode laser showed greater reduction than the 810 nm diode laser by 55% and 12%, respectively.…”

“…Results have been published with the combination of 755, 810 and 1064 nm [12]. In other studies, triple wavelengths of 810, 940 and 1064 nm have been used [13] [14] [15]. However, we have not found any study using triple wavelengths on Indian patients.…”

“…The settings used were simulated by a 3D in silico mathematical model of hair and skin heating using COMSOL Multiphysics ® [15]. In summary, the 3D model includes sapphire contact cooling at 10˚C, along with epidermis, dermis, and hair follicle structure.…”

Study on the efficacy and safety of a high‐power triple wavelength diode laser (810, 940, 1060 nm) for removing fine and less pigmented facial hair on Asian skin

“…16 In other studies, different combinations of wavelengths have been used, such as 810, 940, and 1060 nm. 5,17,18 The main advantage of this combination is that longer wavelengths (810 and 940 nm compared with 755 and 810 nm) are less affected by scattering in the dermis, allowing for deeper penetration which uniformly heats the hair, thereby increasing the safety of the procedure even at high laser fluences since there is less absorption by melanin and less epidermal heating and burns. Additionally, the 940 and 1060 nm wavelengths are significantly absorbed by water and blood, which contributes to the heating of the hair follicle in combination with the absorption by melanin in the hair.…”

Clinical efficacy and safety of ND-YAG laser in hair reduction

“…There are three common wavelengths in commercial use, corresponding to the three types of lasers on the market including; 755 nm alexandrite lasers, 810 nm diode lasers, and 1064 nm Neodymium-doped Yttrium Aluminum Garnet (Nd:YAG) lasers [11,12] .…”