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Skin ultrastructure after CO2 laser resurfacing

S S Collawn1, R E Boissy, L O Vasconez

  • 1Division of Plastic and Reconstructive Surgery, University of Alabama at Birmingham, 35294-3295, USA.

Plastic and Reconstructive Surgery
|August 14, 1998
PubMed
Summary
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Carbon dioxide (CO2) laser resurfacing for facial rejuvenation completely removes the epidermis. Multiple passes increase collagen compaction but significantly damage elastin and cause fibroblast necrosis in the dermis.

Area of Science:

  • Dermatology
  • Aesthetic Medicine
  • Laser Technology

Background:

  • Facial rejuvenation procedures aim to improve skin appearance.
  • Carbon dioxide (CO2) lasers are utilized for skin resurfacing.
  • Understanding the histological effects of CO2 lasers is crucial for optimizing treatment outcomes.

Purpose of the Study:

  • To examine the ultrastructural changes in skin following CO2 laser resurfacing for facial rejuvenation.
  • To evaluate the effects of different CO2 laser systems on dermal and epidermal structures.
  • To assess the impact of multiple laser passes on collagen, elastin, and fibroblasts.

Main Methods:

  • Histological examination of skin biopsies from patients undergoing CO2 laser resurfacing.
  • Utilized three distinct CO2 laser systems: Coherent Ultrapulse, Sharplan Feathertouch, and Laserscope Paragon-70.

Related Experiment Videos

  • Assessed epidermal removal, collagen compaction, elastin integrity, and fibroblast viability post-treatment.

    • Main Results:

    • Complete epidermal ablation occurred after a single CO2 laser pass.
    • Collagen compaction increased sequentially with multiple laser passes, accompanied by loss of the extracellular matrix.
    • Elastin integrity was severely compromised even after one pass, showing heterogeneous structural changes.
    • Fibroblast necrosis was observed, with increased extent and depth corresponding to multiple laser passes.

    Conclusions:

    • CO2 laser resurfacing effectively ablates the epidermis and induces collagen remodeling.
    • Significant damage to dermal elastin and fibroblasts occurs with CO2 laser treatment.
    • Treatment parameters, including the number of passes, influence the degree of tissue alteration.