Treatment of Neck Lines and Forehead Rhytids with a Nonablative 1540‐nm Er:Glass Laser: A Controlled Clinical Study Combined with the Measurement of the Thickness and the Mechanical Properties of the Skin

Background. Nonablative remodeling has been recently proposed as a new, no‐down‐time, antiaging treatment. Objective. The objective was to evaluate the efficacy and safety of nonablative skin remodeling with a 1540‐nm Er:Glass laser on neck lines and forehead rhytids. Methods. Twenty female patients (mean age 45 years) were enrolled. Skin thickness and mechanical properties were measured before the first treatment, 1 month after the third treatment, 1 month after the fifth treatment, and 3 months after the fifth treatment. Results. All patients reported an improvement in both skin tone and texture. Using ultrasound imaging, dermal thickness of neck and forehead increased, respectively, by 70±13 μm (p