introduction: low-level laser therapy (lllt) is thought to have analgesic and biomodulatory effects. our objective was to assess the pain-relieving effect of lllt and possible changes in joint stiffness and disability of patients with knee osteoarthritis (koa) and compare it to the more commonly used modality; therapeutic ultrasound(us). methods: 37 patients with mild or moderate koa were rando...

low-power lasers are a group of lasers with a power less than 250 mw and unlike high-power lasers they have no effect on tissue temperature; they produce light-dependent chemical reactions in tissues. these lasers have analgesic features with their ability to trigger reactions that reduce pain and inflammatory mediators. low-power lasers can also be used instead of needles in acupuncture to dec...