Measurement of effective remnant power in low intensity laser after passage through the buccinator muscle in anatomical human hemifaces

Emilly Cruz Pinto Reuter, Monalisa Jacob Giuselini, Anna Carolina Ratto Tempestini Horliana, Tatiana Dias Schalch, Marcelo Betti Mascaro, Alessandro Melo Deana, Raquel Agnelli Mesquita Ferrari, Sandra Kalil Bussadori, Kristianne Porta Santos Fernandes


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<0.0001) than with that of 780 nm (380 ± 40 µW). Conclusion: The LIL of 780 nm presented greater remnant power in comparison to the 660 nm laser after passage through the buccinator muscle, indicating the latter´s greater penetration capacity.


Facial muscles; Laser therapy, low-level; Myofascial pain syndromes.

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Conscientiae Saúde
ISSN: 1677-1028
e-ISSN: 1983-9324

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