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Long-term epilation with long-pulsed neodimium:YAG laser
P L Bencini1, A Luci, M Galimberti
1Servizio di Dermatologia, Ospedale S. Raffaele, Milan, Italy.
Summary
The long-pulsed Nd:Yag laser effectively removes unwanted hair with 20-40% loss per session, achieving complete epilation in 4-6 treatments without significant side effects for most patients.
Area of Science:
- Dermatology
- Aesthetic Medicine
- Laser Technology
Background:
- Unwanted body hair is a common cosmetic concern.
- Traditional hair removal methods have limitations and side effects.
- Light-based therapies offer long-term epilation solutions.
Purpose of the Study:
- To evaluate the safety and efficacy of a novel long-pulsed Nd:Yag laser for long-term hair removal.
- To assess the effectiveness across different patient groups with varying hair conditions.
Main Methods:
- 208 subjects were divided into three groups based on hair distribution and condition.
- Treatment involved a long-pulsed Nd:Yag laser with fluences of 23-56 J/cm² at monthly intervals.
- Histological analysis and clinical follow-ups (1-6 months) were conducted.
Main Results:
- Each session yielded 20-40% hair loss, varying by hair color.
- Complete epilation was achieved in 4-6 sessions; white hair was unresponsive.
- No adverse effects like blistering or pigmentation changes were observed, even in dark-complexioned patients.
Conclusions:
- The long-pulsed Nd:Yag laser provides excellent, prolonged hair removal with minimal side effects.
- The 1064 nm wavelength targets deeper follicles due to low superficial absorption and significant scattering.
- Histological evidence confirmed follicular and sebaceous gland necrosis and hair disappearance.