Frequently Asked Questions
Optimal melanin absorption + moderate penetration = balanced hair removal efficacy across phototypes.
Primarily phototypes II-IV; less suitable for phototypes V-VI.
75-90% hair reduction depending on hair cycle, phototype, and parameters.
Highly recommended for patient comfort and epidermal safety.
Dark/thick hair; less effective on red/blonde hair due to low absorption.
Temporary hyperpigmentation on dark skin; rare permanent hypopigmentation.
Définition
The alexandrite 755 nm laser is a skin treatment system based on differential light absorption by melanin. At this wavelength, the melanin absorption coefficient is very high, making it an effective choice for hair removal in fair-skinned patients.
Caractéristiques
| Parameter | Value |
|---|---|
| Wavelength | 755 nm |
| Laser type | Alexandrite |
| Melanin absorption coefficient | Very high |
| Penetration depth | 3-4 mm |
| Recommended phototypes | I to III |
| Main advantage | Maximum efficacy on fair skin |
| Major limitation | Increased risk on dark skin |
Références scientifiques
- Anderson RR, Parrish JA. Science 1983;220(4596):524-527
- Altshuler GB et al. Lasers Surg Med 2001;29(5):416-432
Sources scientifiques
- . . JAAD (1999) ;41 :165-171 . PMID: 10426883
- . . Dermatol Ther (2011) ;24 :94-107 . PMID: 21276162
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