By David J. Goldberg
As expertise makes techniques more secure, extra individuals are pursuing new the way to switch their pores and skin. Facial epidermis rejuvenation is principally renowned, with the more moderen ablative and non-ablative recommendations delivering an actual strategy for making improvements to photo-aged pores and skin. This booklet discusses a number of the lasers, mild assets and radio-frequency units presently used, reading the applied sciences and an method of utilizing that approach. The last chapters deal with the difficulty of complications-what to do in the event that they come up and the way to regulate them. The company facets of a facial rejuvenation perform also are reviewed. This one-stop reference at the subject is perfect for dermatologists and different execs within the box.
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Additional info for Ablative and Non-ablative Facial Skin Rejuvenation
Triple pulses provided even greater damage (approximately 30 μm additional damage). Pulse stacking, which may occur unintentionally by moving the handpiece too slowly or by excessive overlap of pulses (40–60% overlap), may be a critical factor in causing delayed wound healing, hypopigmentation, or scarring. This effect occurs because when several pulses are delivered to tissue in rapid succession, the target tissue has insufficient time to cool; thermal effects become additive. In summary, with stacking pulses, the zone of thermal necrosis increases to a much greater degree than with single pulse vaporization (even with multiple passes).
Medium depth resurfacing into the upper reticular dermis could be achieved by using either higher laser energies (> 350 mj per pulse) or by dermabrasion. Deep resurfacing into the midreticular dermis was achieved only through a Baker-Gordon phenol peel. 8 Kauvar et al. used 14 post-treatment biopsies from in vivo human skin to compare three pulsed CO2 lasers with a continuous wave CO2 laser. The purpose of this investigation was to 28 ABLATIVE AND NON-ABLATIVE FACIAL SKIN REJUVENATION determine the depth of ablation and the depth of residual thermal injury produced with each laser system.
6 This study, performed on guinea pig skin, showed that a pulse width of 50 ms, typical of shuttered, continuous wave CO2 lasers, produced thermal damage of 750 µm while the use of a much shorter 2 µs pulse reduced this damaged zone to as little as 50 μm. This histologic study was particularly instructive because it confirmed that minimal thermal damage can be achieved by using pulse widths shorter than the thermal relaxation of skin. 33 In another informative histologic study, Fitzpatrick et al.
Ablative and Non-ablative Facial Skin Rejuvenation by David J. Goldberg