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Skin pigmentation and texture changes after hair removal with the normal-mode ruby laser
M Haedersdal1, H Egekvist, J Efsen
1Department of Dermatology, Bispebjerg Hospital, University of Copenhagen, Denmark. mhaedersdal@dadlnet.dk
Acta Dermato-Venereologica
|December 22, 1999
Summary
Normal mode ruby laser treatment for hair removal is safe for skin types I-IV. This study found minimal, temporary pigmentary changes and no textural alterations post-treatment, indicating good safety for diverse skin tones.
Area of Science:
- Dermatology
- Aesthetic Medicine
- Laser Technology
Background:
- Melanin in hair follicles targets ruby lasers for hair removal.
- Epidermal melanin can cause side effects.
- Assessing ruby laser safety for various skin types is crucial.
Purpose of the Study:
- Objectify skin pigmentation and texture changes after ruby laser hair removal.
- Evaluate how preoperative skin pigmentation affects side effects.
- Determine safety of normal mode ruby laser for skin types I-IV.
Main Methods:
- 17 volunteers (skin types I-IV) received normal mode ruby laser treatment.
- Skin pigmentation and texture changes were measured using spectroscopy, 3D contour analysis, and ultrasonography.
- Clinical assessments evaluated side effects 12 weeks post-treatment.
Main Results:
- Minor postoperative hyperpigmentation (2%) and hypopigmentation (10%) were observed.
- Pigmentary changes correlated with preoperative skin pigmentation.
- No significant changes in skin texture or thickness were detected.
Conclusions:
- Normal mode ruby laser treatment is safe for hair removal in skin types I-IV.
- The treatment causes minimal, temporary pigmentary alterations.
- Skin texture and thickness remain unaffected, supporting treatment safety.