The effect of low-level laser therapy on knee osteoarthritis: prospective, descriptive study
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Osteoarthritis (OA) is one of the most common joint disorders in the elderly which could be associated with considerable physical disability.
Patients and methods
In a descriptive, prospective study, 33 patients enrolled in the study from which 15 people were excluded due to incomplete course of treatment, leaving the total number of 18 patients with knee osteoarthritis. Gal-Al-As diode laser device was used as a source of low-power laser. Patients were performed laser therapy with a probe of LO7 with a wavelength of 810 nm and 50 mW output power in pulse radiation mode (F = 3,000, peak power = 80 W, Δt = 200 ns, density = 0.05 W/cm2, dose = 6 J/cm2, area = 1 cm2) and also a probe of MLO1K with a power output of 30 mW and a wavelength of 890 nm in pulse radiation mode (F = 3,000 Hz, peak power = 50 W, Δt = 200 ns, density = 0.017 W/cm2, total dose = 10 J/cm2), and were given low-level laser therapy (LLLT) three times a week with a total number of 12 sessions. Data were analyzed using SPSS ver. 15, and the obtained data were reported as mean ± SD and frequency (%). To analyze the data, repeated measurement and marginal homogeneity approaches were used.
In the current study, a significant reduction was observed regarding the nocturnal pain, pain on walking and ascending the steps, knee circumference, distance between the hip and heel, and knee to horizontal hip to heel distance at the end of the treatment course.
In brief, the current study focuses on the fact that LLLT is effective in reducing pain in knee osteoarthritis.
KeywordsKnee osteoarthritis Low-level laser therapy Pain
Low-level laser therapy
Transcutaneous electrical nerve stimulation
Western Ontario and McMaster Universities
We would like to offer our special thanks to the Iranian Laser Association for assisting us throughout the current study.
The authors declare they have no financial disclosure.
This article is not supported by any funding organization. There is no sponsor for this work.
- 3.Felson DT (1993) The course of osteoarthritis and factors that affect it. Rheum Dis Clin N Am 19(3):607–615Google Scholar
- 17.http://www.laserlightcanada.com/article-details.php?ID=1255427194S at Mokmeli , Anesthesiologist, H. Attarian, Rheumatologist, M. Hosseini,MD, S. Bishea. Low level laser therapy (LLLT) for knee Osteoarthritis: (A clinical study on 386 patients.)
- 18.Rayegani SM, Bahrami MH, Elyaspour D, Saeedi M, Sanjri H (2012) Therapeutic effects of Low Level Laser Therapy (LLLT) in knee osteoarthritis, compared to therapeutic ultrasound. J Lasers Med Sci 3(2):71–74Google Scholar
- 23.http://discoverlasers.com/blog/low-level-laser-therapy-vs-nsaids (Last accessed 11 Dec 2013)
- 28.Lam TS, Abergel RP, Meeker CA, Castel JC, Dwyer RM, Uitto J (1986) Laser stimulation of collagen synthesis in human skin fibroblasts cultures. Lasers Life Sci 1:61–77Google Scholar
- 32.Lievens P (1988) The influence of laser treatment on the lymphatic system and on wound healing. Laser 1(2):6–12Google Scholar