D&PS

Daily Issue (MAY 29. 2020)

LASER in Clinical Medicine
#12-2. Fractional Laser

The concept of Fractional photothermolysis derives from efforts to reduce the increased incidence of complications resulting from slow tissue regeneration process when the bulk beam removes all tissues at once. Microbeams with a diameter of 100 to 200 µm are irradiated at regular intervals, causing the normal tissues to be mixed with the laser-irradiated tissues. Undamaged normal tissues help the regeneration of heat-damaged tissues, accelerating tissue regeneration and reducing side effects.
In the fractional photothermolysis suggested by R. R. Anderson, first of all, the ablative skin resurfacing takes time until the reepithelization, because of long migratory path lengths for keratinocytes when tissues are removed from the epidermis to the dermis; secondly, the non-ablative dermal……

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