What is 'selective photothermolysis'?

Published 16th May 2023 by PB Admin

Lasers for non-ablative skin resurfacing are based on the theory of 'selective photothermolysis', by which a site-specific, thermally mediated injury targets microscopic areas of tissue, by the selective absorption of pulses of radiation by the chromophores.

Water is the primary chromophore (70% of the tissue) for the skin resurfacing treatment as it is effective for acne scars and stretch marks. The epidermis and superficial dermis can be selectively damaged by mid-infrared (IR) lasers in the range of 1300 to 1550 nm. At these wavelengths, absorption by water is weak enough that relatively deep beam penetration is allowed.

Non-ablative laser treatment for skin imperfections allows practitioners to concentrate the light on the upper layers to break up scar tissue. Thermal injury, directed at tissue water, most likely induces an inflammatory response with cytokine up-regulation and fibroblast proliferation. Subsequent deposition of papillary dermal collagen in a parallel configuration account for the clinical improvement noted months after treatment.

Neauvia's experts have designed LaserMe, a non-ablative fractional laser to treat a wide range of skin imperfections using the optimal wavelength of 1470 nm, which provides a suitable absorption coefficient for water and can penetrate approximately 400 μm deep into the dermis.

LaserMe is a portable non-ablative fractional diode laser designed to effectively treat a variety of skin imperfections: superficial morphological defects including wrinkles and fine lines, acne scars, stretch marks and stretch marks. It allows practitioners to treat all skin types quickly and comfortably, achieving results in non-ablative skin resurfacing and rejuvenation in a few treatments.

LaserMe incorporates a diode laser with a wavelength of 1470 nm and a maximal fluence per microthermal zone (MTZ) of 50 mJ/MTZ, which provides a significant non-ablative skin resurfacing into the dermis. This technology helps replace damaged skin with healthy-looking tissue, thereby improving its appearance without any superficial damage.

LaserMe delivers this through its scanning handpiece that creates microscopic columns of wounded tissue. Local tissue moisture rapidly vaporises, and cells undergo lysis, necrosis, and solidification, resulting in skin rejuvenation, and skin tightening, while stimulating new collagen production.

This is a sponsored story in association with Neauvia

PB Admin

PB Admin

Published 16th May 2023

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