Low-energy Gallium Arsenide laser versus polarized light on healing of full-thickness wound in rats

Objective: To compare between Gallium Arsenide Laser and Polarized Light effects on Full-Thickness wound healing in rats Methods: Sixty mature male albino rats were included. While rats were under anesthesia, area of skin with five-centimeter square (2x2.5cm) was excised from all rats nape, and then rats were assigned directly into three groups equal in number; Group A) received low-intensity laser (GAlAs Laser, 830 nm), Group B) received polarized light (400-2000 nm). Irradiation and illumination starting immediately after surgery as wound irradiation by laser or wound illumination by polarized light occur at an equal distant point from each wound and both groups received total energy of 20 joules and at a rate of three times per week and for two weeks for both light techniques. Group C: received no treatment. Outcome measures: Wounded area and contraction rate measured after 7 days, and 14 days of treatment. Results: In both GAlAs Laser group and polarized light group, there was a better significant reduction of WSA along with better contraction rate than those in the control group, also, significantly, there was a difference between both light groups effects on wound recovery. Conclusion: Both GAlAs Laser and polarized light with the total received the energy of 20 joules have a facilitating effect on wound healing in addition, polarized light had a better wound healing effect than GAlAs laser.