Akai M, Usuba M, Maeshima T, Shirasaki Y, Yasuoka S Lasers Surg Med. 1997. 21(5): 480-4. The influence of low-level (810 nm) laser on bone and cartilage during joint immobilization was examined. The hind limbs of 42 young Wistar rats were immobilized at the knee joint. They were sorted into three groups 1 wk after operation; irradiance 3.9 W/cm2, 5.8 W/cm2, and sham treatment. After 6 treatments for another 2 weeks both hind legs were prepared for 1) indentation of the articular surface of the knee (stiffness and loss tangent), and for 2) dual energy X-ray absorptiometry (bone mineral density) of the focused regions. The indentation test revealed preservation of articular cartilage stiffness with 3.9 and 5.8 W/cm2 therapy. Low level laser treatment may possibly prevent biomechanical changes by immobilization.
Gur A, Karakoc M, Nas K, Cevik R, Sarac J, Demir E. Physical Medicine and Rehabilitation, School of Medicine, Dicle University, Diyarbakir, Turkey, TR Lasers in Medical Science (2002) 17(1):57-61. Low energy lasers are widely used to treat a variety of musculoskeletal conditions including fibromyalgia, despite the lack of scientific evidence to support its efficacy. A randomized, single-blind, placebo-controlled study was conducted to evaluate the efficacy of low-energy laser therapy in 40 female patients with fibromyalgia. Patients with fibromyalgia were randomly allocated to active (GaAs) laser or placebo laser treatment daily for two weeks except weekends. Both the laser and placebo laser groups were evaluated for the improvement in pain, number of tender points, skinfold tenderness, stiffness, sleep disturbance, fatigue, and muscular spasm. In both groups, significant improvements were achieved in all parameters (p<0.05) except sleep disturbance, fatigue and skinfold tenderness in the placebo laser group (p>0.05). It was found that there was no significant difference between the two groups with respect to all parameters before therapy whereas a significant difference was observed in parameters as pain, muscle spasm morning stiffness and tender point numbers in favour of laser group after therapy (p<0.05). None of the participants reported any […]
Click on the following link to read the clinical trial results on the Hypothesis: Reduction in the perception of pain can be achieved with specific applications of Low Level Laser Therapy (LLLT) at ML830nm® for certain conditions. http://www.dcorthoacademy.com/e-Journal/sept05.pdf
Smith CF, Vangsness CT, Anderson T & Good W (1995) Univ. of Southern California School of Medicine (USA), General Motors (USA) The International Society for Optical Engineering (SPIE) Proceedings SPIE (1995) 2395; 658-661. A randomized, double-blind study was initiated in 1990 to evaluate an eight-point conservative treatment program in carpal tunnel syndrome. 160 patients were delineated with symptoms of carpal tunnel syndrome and these patients were then divided into two groups. Both groups were subjected to an ergonomically correct eight-point work modification program. A counterfeit LLLT unit was used in Group A, while an actual LLLT unit was used in Group B. Groups A and B were statistically significantly different in terms of return to work, conduction study improvement, and certain range of motion.