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Long-term hair removal using a 3-millisecond alexandrite laser.
1Division of Dermatology, University of Ottawa, Ottawa Hospital, Ottawa, Ontario, Canada.
Journal of Cutaneous Medicine and Surgery
|February 17, 2001
Summary
A single alexandrite laser treatment effectively reduces hair density, offering a long-term solution for unwanted hair removal. This study confirms its potential for permanent hair loss after just one session.
Area of Science:
- Dermatology
- Aesthetic Medicine
- Laser Technology
Background:
- Laser epilation is a common alternative to electrolysis for hair removal.
- Current laser systems induce temporary hair loss (telogen).
- Limited data exists on the long-term permanency of laser hair removal.
Purpose of the Study:
- To evaluate long-term hair loss after a single alexandrite laser treatment.
- To assess the benefits and limitations of specific laser systems for permanent hair removal.
Main Methods:
- 25 study sites treated with a 3-msec alexandrite laser (755 nm, 30-50 J/cm²).
- Hair counts assessed manually and via photographic images.
- Follow-up at one growth cycle and one growth cycle plus 6 months.
Main Results:
- Average hair loss of 43% after the first follow-up.
- 60% of sites showed over 30% hair loss.
- Hair loss remained stable and was statistically significant (p <.05).
Conclusions:
- A normal-mode alexandrite laser provides long-term alopecia.
- Potential for permanent terminal hair loss after one treatment.
- Effective at fluences of 30-50 J/cm².