Hybrid Fractional Laser: A Multi-Center Trial on the Safety and Efficacy for Photorejuvenation

BACKGROUND: Laser skin resurfacing has continued to evolve over the past two decades. One of the most recent advances included a hybrid fractional laser resurfacing system that can sequentially utilize two wavelengths in its delivery, non-ablative coagulation with 1470 nm, and ablative vaporization with 2940 nm. The 1470 nm laser wavelength is absorbed by water, which is ideal for creating controlled zones of coagulation to chosen depths into the dermis up to 700 micrometers. The 2940 nm laser wavelength has a large water absorption coefficient, which results in precise ablation as desired in the epidermis up to 110 micrometers. This combination allows for fractionated non-ablative and ablative skin resurfacing simultaneously resulting in a cosmetic improvement in pigmentation, tone, texture of skin as well as other effects of photoaging. METHODS: Open-label prospective, multi-center study in which 34 female subjects were enrolled with Fitzpatrick skin types I-IV, mean age of 52 ± 14 years. Each subject underwent two treatments, spaced 4-6 weeks apart. Follow up visits at 1 week, 2 weeks, and 1, 2, and 3 months after the first treatment. Photographs, numeric pain scores during treatment, and subject satisfaction survey questionnaires were evaluated. Photographs were analyzed by six blinded evaluators. The primary endpoint was to evaluate safety and efficacy of hybrid laser treatments for photodamage and dyschromia. The secondary endpoints included evaluating the tolerability of the treatment using the Wong Baker Face scale and patient satisfaction survey results. RESULTS: Of the 29 subjects completing the study, 80% showed significant skin improvement on photographic analysis. Average numeric pain score was a 4 on a 0-10 scale. Survey results showed 100% satisfaction with treatment and achieved results. Two patients experienced post-inflammatory hyperpigmentation that resolved within 90 days. No other adverse events were reported. CONCLUSION: The non-ablative and ablative hybrid fractional laser can be used to safely and efficaciously treat photodamaged skin with high patient satisfaction and minimal adverse events. J Drugs Dermatol. 2018;17(11):1164-1168.