Extracorporeal Shock Wave Stimulates Angiogenesis and Collagen Production in Facial Soft Tissue

Area of Science:

• Dermatology
• Regenerative Medicine
• Biomedical Engineering

Background:

• Investigated the efficacy of extracorporeal shock wave (ESW) application on facial skin.
• Focused on stimulating dermal thickness, vascularity, and collagen synthesis.
• Utilized a large animal model for preclinical assessment.

Purpose of the Study:

• To evaluate the impact of different intensities of ESW on facial skin.
• To assess histological and immunohistochemical changes in the skin.
• To determine the potential of ESW for enhancing skin regeneration.

Main Methods:

• Treated goat facial skin (maxillary and mandibular areas) with ESWs (0.15 and 0.45 mJ/mm², 1000 pulses).
• Analyzed skin samples after 4 days using histology and immunohistochemistry.
• Measured dermal thickness, microvessel count/abundance, type 1 collagen, and alpha-smooth muscle actin expression.

Main Results:

• ESW application significantly increased dermal thickness, microvessel count, and collagen synthesis at both tested intensities (P < 0.05).
• Lower intensity (0.15 mJ/mm²) yielded higher collagen abundance (P = 0.034).
• Higher intensity (0.45 mJ/mm²) resulted in a greater number of microvessels (P = 0.002).

Conclusions:

• A single session of focused, low-energy ESW can improve facial skin thickness via collagen stimulation and enhanced microcirculation.
• The findings support ESW as a potential pretreatment for skin flaps to improve tissue healing.
• Further investigation is warranted for clinical applications in reconstructive surgery and wound healing.