There are two types of fractional laser:
CO2 lasers have been used for resurfacing for many years but can have significant side-effects and require long recovery periods.
Fractional CO2 lasers are fitted with a scanner which filters the laser ray; consequently it doesn’t operate continuously but by microscopic impact points separated by healthy skin. This is its major advantage in relation to the classic CO2 laser:
However a number of treatment sessions are required.
Approved used for fractional CO2 lasers: