Farhad Hamad Mustafa1, Mohamad Suhimi Jaafar2, Asaad Hamid Ismail3, Kussay Nugamesh Mutter4. 1. Medical Physics and Radiation Science, College of Pharmacy, Hawler Medical University, 44002 Erbil, Iraq. 2. Medical Physics and Laser Research Group, School of Physics, Universiti Sains Malaysia, 11800 Penang, Malaysia. 3. Radiation Science and Medical Physics, Education College, Physics Department, Salahaddin University, 44002 Erbil, Iraq. 4. Engineering Physics, School of Physics, Universiti Sains Malaysia, 11800 Penang, Malaysia.
Abstract
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.
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.
Authors: Omar A Ibrahimi; Mathew M Avram; C William Hanke; Suzanne L Kilmer; R Rox Anderson Journal: Dermatol Ther Date: 2011 Jan-Feb Impact factor: 2.851