Objective: To determine the effective remnant power after the passage of low intensity laser of two different wavelengths (660 and 780 nm) through buccinator muscle in anatomical hemifaces. Methods: Five human hemifaces were dissected, and a laser was shone in the central region of the muscle with a receiver placed on the opposite side. The hemifaces were irradiated using the same dosimetric parameters (40 mW, 1 W/cm2, continuous mode, 0.04 cm2) and at the same point in every muscle; remnant power was measured for each irradiation. Results: The average remnant power after irradiation with 660 nm (149 ± 15 µW) light was significantly lower (p
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