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Lasers are becoming widely used in medicine due to their beneficial effects such as: coagulation properties (less postoperative bleeding). As an alternative, lasers produce invisible infrared light at a wavelength of 2.940 nm which is ideal for absorption by hydroxylapatite and water. Therefore, they can be used for the treatment of both soft and hard tissues. The aim of this study is to investigate the interaction between the laser systems with power 15 W and pulse repletion rate up to 1 KHz on chicken skin at various irradiation parameters with distance 10 cm. A beam delivery unit, a focusing camera and a computer controlled stepper unit with sample holder to move the sample while irradiation with different laser parameter were used in this study. After irradiation and to inspect skin geometry and damage light microscopy, image analysis and laser scanning microscopy were used. It was noticed that the surface of the skin was slightly damaged with depth up to 3 mm and width about 200mm. This damage disappeared after few minutes of irradiation. In conclusion, the experiment demonstrated that the Er:YAG-laser system is an efficient tool for studying the interaction between the skin and laser in terms of use in treatment of skin problems. The results also show that when the number of pulses increases the depth of the laser becomes more and the damage increases as well. Further research, including controlled clinical and research studies, to investigate the higher efficacy, as well as side effects of laser therapy, is needed.

PRIMARY INVESTIGATION ON POTENTIAL INTERACTION OF AN ER: YAG LASER SYSTEM WITH SKIN