Morrone G, Guzzardella G A, Tigani D et al. PMID: 10728586 [PubMed – indexed for MEDLINE] Artif Cells Blood Substit Immobil Biotechnol. 2000 Mar;28(2):193-201 The aim of the study was to verify the effects of lllt performed with GaAlAs (780 nm, 2500 mW) on human cartilage cells in vitro. The cartilage sample used for the biostimulation treatment was taken from the right knee of a 19-year-old patient. After the chondrocytes were isolated and suspended for cultivation, the cultures were incubated for 10 days. The cultures were divided into four groups. Groups I, II, III were subject to biostimulation with the following laser parameters: 300J, 1W, 100Hz,10 min. exposure, pulsating emission; 300J, 1W, 300Hz, 10 min. exposure, pulsating emission; and 300J, 1W, 500Hz, 10 min. exposure, pulsating emission, respectively. Group IV did not receive any treatment. The laser biostimulation was conducted for five consecutive days. The data showed good results in terms of cell viability and levels of Ca and Alkaline Phosphate in the groups treated with laser compared to the untreated group. The results obtained confirm our previous positive in vitro results that the GaAlAs Laser provides biostimulation without cell damage.
Sanseverino NTM, Sanseverino CAM, Ribeiro MS et al. The Journal of Laser Therapy MILLENNIUM EDITION • VOLUMES 12 & 13 Lasers in Medicine and Surgery (2002) Supplement 14, Atlanta, Georgia. The improved outcome of laser therapy, if higher doses are given, is documented in the study by Sanseverino 10 patients with pain and limitation of movements of the jaw were treated by 785 nm GaAIAs laser, dose 45 J/cm2. The joint and tender points in the masticatory and otherwise involved muscles was applied three times per week during three weeks. A control group of 10 patients was given sham laser therapy. The evaluation was performed through subjective pain assessment and measurement of the movements of the jaw. There was a significant improvement in the laser group only.
J.M. Bjordal, C. Couppe University of Bergen, Dept. Physiotherapy Science, Bergen, Norway Abstract from the 7th International Congress of European Medical Laser Association, Dubrovnik, Croatia, June 2000. What is optimal dose, power density and timing for low level laser therapy in tendon injuries? A review of in vitro and in vivo trials Purpose: To investigate the effect of different laser treatment parameters on fibroblast inflammation and production of collagen fibers. Material : Controlled in vitro or in vivo trials with low level laser therapy (LLLT) Method : Literature search for trials published after 1980 using LLLT on Medline, Embase, Cochrane Library and handsearch of physiotherapy journals in English and Scandinavian languages. Optimal treatment parameters regarding timing, treatment frequency, dose and power density at target tissue were synthesized. Results : The literature search identified 31 controlled trials with LLLT on collagen tissue. Three in vitro trials were performed on stretch-induced and inflammation in fibroblast cultures and five in vitro trials were performed on collagen production. Optimal dose and power density for inhibition of prostaglandin PGE2 and interleukin 1- beta production was found to be 3.2-6.3 J/cm2 and 5.3 mW/cm2 measured at the target fibroblast cells after 5 days of irradiation. […]
Yoshimi Asagai, M.D.1, Atsuhiro Imakiire, M.D.2, Toshio Ohshiro, M.D.3, 1. Shinano Handicapped Children`s Hospital Shimosuwa, Nagano, Japan 2. Department of Orthopaedic Surgery, Tokyo Medical University Shinjuku, Tokyo, Japan 3. Japan Medical Laser Laboratory, Shinanomachi, Tokyo, Japan Presentation at World Association of Laser Therapy annual conference in Athens,Greece. 2000. Acute-phase injury is generally treated by localized cooling of the region, and rarely by the active use of low level laser therapy (LLLT) in Japan. Thermographic studies of acute-phase injury revealed that circulatory disturbances at the site of trauma occurred due to swelling and edema on the day following the injury, and that skin temperature was high at the site of the trauma and low at the periphery. Following LLLT, circulatory disturbances rapidly improved, while temperature in the high temperature zone around the site of trauma fell by 3 degrees on the average, but at the periphery the low temperature rose by 3 degrees on the average to nearly normal skin temperature. Clinically, swelling and edema improved. LLLT was also useful in treating necrosis of the skin in the wound area and in accelerating healing of surgical wounds of paralytic feet, which are prone to delayed, wound healing and also wounds […]
Lilic Alen, physiotherapist; Kozlevcar Zivec Maja, dr. med. spec.fiz.reh.med.; Marcan Radoslav, dr.med., spec.ortop FIZIO, Ilirska Bistrica, Slovenija, Iskra Medical, Ljubljana, Slovenija, Ortopedska bolnisnica Valdoltra, Slovenija In the present article we will review different kind of injuries in the alpine ski sport and we will concentrate on the injuries of the ligamentar part of the knees and meniscs in slovenian ski team. After the description of the injuries follows detailed presentation of the rehabilitational procedures from the first day of the injury till the return in to the competition arena. We will try to explain the modalities of the rehabilitational procedures and their influence in the tissues, their main and side effects. Our main attention will be focused to the use of the biostimulative laser of higher power – 1,2 W and wave length of 830 nm and it’s influence on the velocity of recovery in the patients and their success in following competitions.