Er:YAG Lasers

Er:YAG and CO2 Lasers are the systems of choice for ablative laser skin resurfacing. Er:YAG Lasers are commonly used to repair skin damage, including acne scars and melasma (excess pigmentation). Er:YAG lasers are also routinely used to cut bone and tissue. They are used in laser dentistry and other surgical applications.

Er:YAG Lasers work by ablating (vaporizing) the surface layer of the skin. Each pass with the Er:YAG laser removes approximately 10 micrometers of skin tissue (1/100th of a millimeter). This type of technology is the basis for the procedure known as a “laser peel”. Some ER:YAG laser systems can be tuned to produce laser peels of varying depth.

Er:YAG Lasers primarily target the surface of the skin, and are not as effective as CO2 lasers at remodeling the collagen matrix underneath the skin. As a result, Er:YAG lasers are excellent options for repairing minor to moderate scarring and other superficial skin damage, but are less effective for severe scarring, especially pitted acne scars. Because Er:YAG lasers primarily affect the surface of the skin, the recovery times are faster and the side effects are generally milder than more invasive laser resurfacing techniques, such as CO2 Laser resurfacing.

Er:YAG Lasers are primarily used as a treatment for acne scars. They are rarely used for the treatment of active acne. Er:YAG Lasers have a good efficacy profile against mild to moderate acne scarring. Er:YAG Lasers are generally considered to be more effective for the treatment of acne scars purposes than many other light and laser treatment modalities, including as Nd:YAG, Pulsed Dye Lasers (PDL) and Intense Pulsed Light (IPL).

The (relatively) mild side effects of Er:YAG Lasers, combined with decent efficacy and generally positive patient response has made Er:YAG lasers a popular treatment option for superficial acne scars. The biggest limitation of Er:YAg lasers is their inability to effectively treat the extensive and deep scarring that is common in those who have suffered from severe inflammatory and cystic acne. For the treatment of moderate to severe acne scars, C02 Lasers generally provide better improvement. However, CO2 Lasers tend to generate more severe side effects and the recovery period can be significantly longer.

Er:YAG Lasers utilize Erbium-doped Yttrium Aluminium Garnet as the lasing medium. Er:YAG Lasers generate a laser beam with a very long wavelength (~2940 nm). This wavelength is in the infra-red spectrum and is strongly absorbed by water. The longer wavelength of the Er:YAG laser beam helps it to penetrate deeply into the skin tissue.

Er:YAG treatment is administered in cosmetic surgery clinics, dermatology offices and hospitals. Er:YAG Laser treatment can be done as a complete or fractional ablation technique. Complete ablation treats all of the skin in a given region, but fractional treatment leaves small areas of untreated skin in between (like a checkerboard). Recovery times from fractional treatment tend to be substantially shorter than from complete ablation treatments.

Common Er:YAG Laser Systems

Alma Pixel, Contour TRL, Fotona, FRAXEL RE:STORE (fractional Er:YAG laser system), Sciton Profractional, Venus .


Resurfacing of Pitted Acne Facial Scars with a Long Pulsed Er:YAG Laser. Jeong, et al. 2001.
Resurfacing of Pitted Facial Acne Scars Using Er:YAG Laser with Ablation and Coagulation Mode. Jeong, et al. 2003.
Treatment of Atrophic Acne Scars with a Dual Mode Er:YAG Laser. Tanzi, et al. 2002.
Minimally Ablative Erbium:YAG Laser Resurfacing of Facial Atrophic Acne Scars in Asian Skin: A Pilot Study. Tay, et al. 2008.