Long-pulsed Alexandrite Laser vs. Intense Pulsed Light for Axillary Hair Removal in Korean Women

Abstract

Background and Objectives Although several lasers are available for treatment of unwanted hair, treatment of darker skin types is especially challenging because of increased concentrations of epidermal melanin. The laser energy absorbed by targeted hair follicles is reduced, and the risk of side effects in the epidermis is increased. While many studies have documented the safety and efficacy of different laser systems, few studies investigating laser hair removal in Korea have been reported. This study was conducted in order to compare effectiveness, satisfaction level, and safety of a long-pulsed alexandrite laser and intense pulsed light (IPL) in axillary hair removal in Korean women. Materials and Methods In this within-patient, right-left, assessor-blinded comparative study, 13 female patients with Fitzpatrick skin type III to IV were randomized for treatments with the long-pulsed (755 nm) alexandrite laser and IPL (600-950 nm filter) on their right or left side of the axilla. Three sessions of treatment at four week intervals were performed; follow-ups were conducted eight weeks after the last treatment. Hair counts and photographic evaluation of treated sites were performed at baseline and at the last follow-up. The patients scored satisfaction rates and degree of pain for both devices. Results Thirteen patients completed the study. At eight weeks after the final treatment, the decrease in hair counts on the alexandrite laser side (96%) was greater than that on the IPL side (86% vs. pretreatment). The score for patient-evaluated overall satisfaction was higher with the alexandrite laser, although higher pain scores were reported with the alexandrite laser. A burn was observed on one patient on the alexandrite laser side, but was transient and recovered without sequelae. Conclusion Both systems demonstrated satisfactory hair removal results, as reported by both patients and clinician. The long pulsed alexandrite laser can be used effectively and safely for hair removal in darker skin types.