Patients, holding the VAS, were asked to point to the face/score number that indicated the level of his or her pain. Pain level was measured as follows: No pain or the absence of any discomfort, scored as 0 (zero); mild pain, scored from 1 to 3; moderate pain, scored as 4, 5, 6 or 7; and severe pain, scored as 8, 9 or 10. A second question regarding sleep quality of the patients was answered after 21 days of the buccal-relaxant and placebo treatments. All results were recorded in each patient's folder, under restricted access.