Laser resurfacing uses a laser to send out brief pulses of high energy light that are absorbed by water and other sub layers in the skin called chromophores. Fractional laser resurfacing removes layers of skin tissue in a fractionated method (columns of skin are removed leaving the skin surrounding each column intact to aid in healing.)
The light is changed into heat energy and the heat then destroys (vapourises) section of skin layer by layer. As the wounded area heals, new skin grows to replace the damaged skin.The carbon dioxied (CO2) laser is the most common type of laser used for resurfacing. Erbium lasers are also used.
Fractional laser treatment is a non- invasive treatment and uses a device to deliver a laser beam divided into thousands of microscopic treatment zones(MTZ) that target a fraction of skin at a time.
Fractional laser has bridged the gap between the ablative and non-ablative laser techniques as it treats both upper epidermal and lower dermal layers of skin.
There are number of machines available that uses fractional technology based on Erbium ;yag lasers for superficial treatments and CO2 lasers for deeper ablative treatments.
It can be used in all skin types and patients.
The dermis ( mid- layer of skin) is made up of collagen and elastin fibers that provide skin with strength ,elasticity and pliability.
Fractional device delivers a laser into skin layer which is divided into thousands of tiny but deep columns of treatment. These are called micro thermal zones(MTZ). Within each MTZ old epidermal pigmented cells are expelled and penetration of dermal collegen causes a reaction that leads to collegen formation , hence smoother firm skin with filling effect on scar depth. By using MTZs the surrounding healthy tissue remains intact and unaffected and helps to heal wound faster.