Optimizing Q-switched lasers for melasma and acquired dermal melanoses

Area of Science:

• Dermatology
• Laser Medicine
• Aesthetic Surgery

Background:

• Q-switched Nd:YAG laser is a standard treatment for pigmented lesions.
• Dual wavelengths (1064nm/532nm) are suitable for Indian skin tones.
• Its efficacy in melasma and acquired dermal melanoses requires further clarification.

Purpose of the Study:

• To review the literature on laser toning for melasma.
• To evaluate the Q-switched Nd:YAG laser's role in treating acquired dermal melanoses.
• To assess treatment protocols and outcomes for pigmentary disorders.

Main Methods:

• Literature review of Q-switched Nd:YAG laser applications in melasma and dermal melanoses.
• Analysis of studies utilizing low-fluence 1064nm wavelength with multi-pass technique.
• Evaluation of treatment parameters like spot size and session intervals.

Main Results:

• Q-switched Nd:YAG laser shows variable success in melasma and lichen planus pigmentosus.
• The 1064nm wavelength is preferred for deeper dermal penetration.
• Multiple sessions are generally required; recurrences are common post-therapy.

Conclusions:

• Low-fluence, multi-pass Q-switched Nd:YAG laser (1064nm) is a potential treatment for melasma and dermal melanoses.
• Optimized parameters (large spot size, 2-week intervals) may minimize adverse effects like hypopigmentation.
• Further research is needed to establish definitive protocols and long-term efficacy.