US Patent 8656931 Aesthetic treatment for wrinkle reduction and rejuvenation

A dermatological treatment method includes directing laser energy having a wavelength of 2.79 μm onto skin. According to disclosed methods, the energy can function to ablate a first portion of epidermal tissue, coagulate an underlying second portion of epidermal tissue, and promote collagen formation in tissue of the underlying dermis. In an exemplary treatment apparatus, a laser using a YSGG gain medium is mounted in a handpiece. The handpiece may include a two-axis scanner to allow for uniform scanning of the energy over the tissue surface.