Objective To evaluate effectiveness of low-level laser therapy（LLLT） on temporomandibular joint（TMJ） pain. Methods The patients with TMJ pain were randomly assigned laser group（n=21） or control group（n=21）, once a day for 6 consecutive days of treatment. TMJ pain and function were measured at baseline, just after treatment course, 1 month and 2 months after the treatment. Results The changes of visual analogue scale（VAS） were app earing over time in both groups but presented statistically significant differences between groups（P
