Potentiated anti-inflammatory effect of combined 780Â nm and 660Â nm low level laser therapy on the experimental laryngitis

► A new treatment to neurogenic laryngitis has been proposed. ► We evaluated the laser therapy on the nasogastric intubation-induced laryngitis. ► We evaluated the effect of combined 780/660 nm LLLT on the experimental laryngitis. ► The association of such therapies improved the reflux laryngitis. ► Such combination therapies modulated the inflammation and collagenization.