Methods: The study was done as a double blind, split mouth, clinical trial. 38 regions were operated symmetrically. Exclusion criterion was systemic disease that contrandication the BSSO. In each patient, the jaw was divided into control and experimental group. In experimental group, after surgery, diode laser 810 nm, power 100 mv, energy 4 J/cm2 and 80 s was irradiated. In control group, laser was only showed, but did not irradiated (placebo).The pain evaluation was done 6, 12, 24, and 48 hours after surgery. The data were analyzed with Wilcson signed ranks test.
Results: Patients with mean, 20.4±1.7 years of age, 6 male and 13 female, where selected. The jaw was divided into 2 groups (control-experimental) randomly. The experimental group showed more pain decreasing than the placebo (control group) (12 h after surgery P=0.003, 24 h after surgery P<0.001).
Conclusions: Low power laser application can cause pain control, more significantly than the placebo group, after the BSSO.