Histology of laser resurfacing.

The development of high-peak power or scanned CO2 lasers that precisely remove layers of photodamaged skin has provided a novel method of skin rejuvenation. Clinical data suggest that laser resurfacing provides comparable or better results than conventional methods of chemical peeling and mechanical dermabrasion, with a lower risk-to-benefit ratio. Histologic studies of the effects of these lasers on tissue have been helpful in establishing guidelines for appropriate clinical use of these lasers and insights into the mechanisms whereby facial skin rejuvenation is achieved.