Résumé de communication

Objectives: This study aims to explore the efficacy and safety of our three-step approach to acne scars using picosecond Laser treatment. Introduction: Picosecond Laser has recently emerged as the newest treatment option for acne scars. When equipped with a Diffractive Optical Element (DOE), a picosecond Laser, can transform the laser beam into columns of high fluence beams, which can cause Laser Induced Optical Breakdown (LIOB), which will induce a tissue repair process to improve acne scarring. We propose a three-step protocol to treat acne scars using a picosecond Laser. Materials / method: 30 Asian patients of both genders in the tropical zone were enrolled in this study. Subjects received 6 Laser treatments at 4-week intervals. The three steps in this approach include the simultaneous use of Laser toning to target pigmentary alteration due to acne vulgaris, followed by two Fractional Laser treatments using fractional DOE handpieces with two different focal lengths to target different depths of acne-scarred skin. Efficacy and safety were evaluated using Global Acne Scar Severity Scale (GASSS) at every visit and four weeks and eight weeks, and after the final treatment. Results: Remarkable improvements were seen in all patients using the global improvement scores at weeks 4, 8, and 12, with increased improvements at each follow-up compared to baseline. Improvements were seen in skin tone, texture, and depth reduction of the acne scars. Conclusion: The three steps combination of picosecond 1064 nm laser toning and fractional Picosecond 1064nm laser with two different focal lengths is safe and efficacious in treating acne scars for Asian Patients in Tropical Zone.