الفهرس 
High versus low power laser in treating acute and subacute lumbar disc herniation
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Abstract
BACK GROUND:lumbar disc herniation (LDH) is a common cause of low back pain (LBP). It affects quality of life.Low and high power laser have shown significant effects in reducing pain, disability and improving life quality in patients with LDH. OBJECTIVES: The aim of this study wasto compare between the effect of high power, low power laser combined with core stability exercises in patients with acute and subacute LDH. METHODS: Sixty male and female patients with acute or subacute LDH with unilateral leg pain, their ages were ranged between 25-45 years. Patients were randomly assigned into three groups receiving high power, low power and placebo laser therapy in combination with core stability exercise program. Pain, disability, ROM and SLR angle were examined before, after 6 sessions (post I) and after 12 sessions (post II) using visual analogue scale(VAS), Oswestry Disability Index(ODI), back range of motion instrument and inclinometer, respectively. RESULTS:The results showed that there wassignificant decrease in VAS and ODI and significant increase in SLR and back ROM in the three groups.There was significant decrease in VAS and ODI of high and low power laser group compared with that of placebo group and a significant decrease in high power laser group compared with that of low level laser group.There was significant increase in back ROM of high power laser group compared with that of low power laser group and placebo group.
CONCLUSIONS:high and low power laser are effective in treating patients with LDH; however high power laser is more effective than low power laser and placebo in treating patients with acute and subacute LDH