Histological Skin Changes After Treatment with 675 nm Laser

Laser emission at 675 nm: In vitro study evidence of a promising role in skin rejuvenation

“…The RedTouch laser (Deka Mela, Florence, Italy) technology is based on a wavelength emission of 675 nm (red light) through micro thermal zone (“DOT” of 0.7 mm width) and a scanning system of 15 × 15 mm capable of producing a selective skin thermal damage with an average depth of 500 μm, getting to the dermis. The DOT pulses separated by untreated tissue (DOT spacing) induce a heating impact in this area, causing denaturation of collagen fibers and the production of new collagen [ 15 ]. To protect the epidermis from temperature increase, RedTouch includes an integrated contact skin cooling system.…”

Methods for the Improvement of Acne Scars Used in Dermatology and Cosmetology: A Review

“…All patients had significant scar improvement and no side effects. This laser system is well tolerated with comfortable and easy posttreatment management for patients [ 36 , 37 ].…”

Facial rejuvenation: A safe and effective treatment with a fractional non‐ablative 675 nm laser in Asian population

“…2,3 These results were then also corroborated by histological findings of human skin biopsies, which demonstrate that 675-nm laser is able to induce collagen remodeling, with a prominent increase in thin and new collagen fibers. 4 Main advantages of this device are a significant reduction in postoperative downtime compared to CO 2 /erbium lasers, and its use in darker skin patient types, thanks to its ability, unlike ablative lasers, to not induce the phenomenon of hyperpigmentation. 2 This new 675 nm wavelength device acts directly on the collagen component and selectively targets dermal collagen (unlike laser systems that use wavelengths below 650 nm which are highly absorbed by hemoglobin and the ones over 950 nm which are mainly absorbed by water): The mechanism is based on the heat transfer directly to the collagen fibers without interfering with other chromophores.…”