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2.4 Light Emitting Diode Device and Use The LED device used was provided by BIOLUX RESEARCH LTD (device description in Appendix A4). Device characteristics: • is a class 1-M laser (and is therefore relatively safe) • provided extra-orally derived, transdermal infrared light to a given target area • had a wall mounted power source • had a controller that indicated the time remaining for each treatment, the number of treatments completed and controlled the activation of specific LED arrays • featured a face detection mechanism to permit monitoring and reinforcement of compliance LED device specifications: • 220mA/array, 850nm, 150mW/cm^2 • within alveolus= 1-10mW/cm^2 (pilot readings: 0.92-6.92J/cm^2) • will not exceed 41 degrees LED prescription and other patient instructions The LED light was delivered using a randomly allocated split mouth design. In each case, the facemask (Figure 2.4 D) was adjusted for each patient to ensure that the LED array was parallel to the occlusal plane of each patient. Furthermore, the LED array was positioned to target the root of the tooth being retracted as well as the extraction site into which the tooth would be moved. (Figure 2.4 C) 21PDF Image | Effect of LED Phototherapy on the Rate of Orthodontic Tooth Movement
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