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Comparison of Alexandrite and Diode Lasers for Hair Removal in Dark and Medium Skin: Which is Better?
Farhad Hamad Mustafa1, Mohamad Suhimi Jaafar2, Asaad Hamid Ismail3
1Medical Physics and Radiation Science, College of Pharmacy, Hawler Medical University, 44002 Erbil, Iraq.
Introduction:
To improve laser hair removal (LHR) for dark skin, the fluence rate reaching the hair follicle in LHR is important. This paper presents the results of a comparative study examining the function of wavelength on dark skin types using 755 nm alexandrite and 810 nm diode lasers.
Methods:
The structure of the skin was created using a realistic skin model by the Advanced Systems Analysis Program.
Result:
In this study, the alexandrite laser (755 nm) and diode laser (810 nm) beam-skin tissue interactions were simulated. The simulation results for both lasers differed. The transmission ratio of the diode laser to the dark skin dermis was approximately 4% more than that of the alexandrite laser for the same skin type. For the diode laser at skin depth z = 0.67 mm, the average transmission ratios of both samples were 36% and 27.5%, but those for the alexandrite laser at the same skin depth were 32% and 25%.
Conclusion:
Both lasers were suitable in LHR for dark skin types, but the diode laser was better than the alexandrite laser because the former could penetrate deeper into the dermis layer.
