What is Low Level Laser Therapy Used For?
Low Level Laser Therapy (LLLT) is also commonly known as biostimulation, photobiomodulation & cold laser therapy. Low Level Laser Therapy (LLLT) is a form of phototherapy that involves the application of low power monochromatic and coherent light to injuries and lesions to stimulate healing.
Low Level Laser Therapy (LLLT) is used to increase the speed, quality and tensile strength of tissue repair, resolve inflammation and give pain relief. The effects of Low Level Laser Therapy (LLLT) are especially striking in areas of the body where cells are under stress. Today, Low Level Laser Therapy (LLLT) are used in a variety of medical and surgical fields, including chiropractic, dentistry, osteopathic, physiotherapy, cosmetic, pain attenuation, diabetic wound healing and acupuncture to name but a few.
The effects of Low Level Laser Therapy (LLLT) are photochemical, not thermal, and the responses of cells occur due to changes in photoacceptor molecules chromophores. Energy, which is delivered to the cells, produces insignificant and minimal temperature changes typically in the temperature range 0.1–0.5°C. The exact mechanism of action of Low Level Laser Therapy (LLLT) is not completely understood. However, it is known that during low level laser irradiation, cells absorb the photon and its energy is incorporated into the chromophore and stimulates cellular metabolism. The molecule that has absorbed this energy is able to transfer this energy to another molecule and thus cause chemical reactions in surrounding tissue. This energy that has been transferred can increase the acceptor molecules kinetic energy, activate or deactivate enzymes or alter physical and chemical properties of macromolecules.
The exact nature of biostimulation or the effects of Low Level Laser Therapy (LLLT) in different medical fields requires extensive research. Although Low Level Laser Therapy (LLLT) has been in use for several years, this phototherapy is still not an established therapeutic modality. What is neither well known nor easily understood is that these low power lasers have been used in laboratories and clinics for years to modulate cell function, reduce pain and accelerate healing of soft tissue injuries.
Laser Wound Healing
A wound may be defined as any disruption of the tissues or organs of the body caused by injury.
Healing is the process by which the body replaces destroyed or dead tissue with living tissue. This may take place by first intention, in which the parts unite directly without the intervention of granulations. Healing by secondary intention, is the name given to the healing of a wound with separated edges due to tissue loss. Union occurs by the adhesion of granulation tissue.
There are five phases in the wound healing process:
- Haemostasis; the arrest of bleeding by involving the physiological processes of blood coagulation and contraction of blood vessels. Haemostasis lasts several minutes.
- Inflammatory phase; triggers neutrophils and macrophage migration into the wound. This phase lasts several days.
- Granulation; the formation of a multicellular mass of tissue which can last up to three weeks.
- Re-epithelization; basement proteins reappear in a very ordered sequence from the wound inward in a zipper like-fashion closing the epidermal defect.
- Wound contraction and tissue remodeling; growth factors and other peptides provide stimuli for wound contraction.
Wound healing involves a broad category of patients who require treatment with minimal trauma and few complications – patients with bedsores, skin disorders, ulcerations, and diabetics with delayed wound healing. Reports of Low Level Laser Therapy (LLLT) applied to soft tissues in vitro and in vivo suggest stimulation of specific metabolic processes in healing wounds. While low doses of Low Level Laser Therapy (LLLT) are stimulatory, high doses of laser radiation are suppressive.
Daily Low Level Laser Therapy (LLLT) during the postoperative period has been shown to stimulate collagen formation and increase the strength of a forming scar. Major changes seen in wounds treated with Low Level Laser Therapy (LLLT) include increased granulation tissue, early epithelialization, increased fibroblast proliferation and matrix synthesis and enhanced neovascularization.
So if you are suffering low back pain, sciatica or a pinched nerve in your neck and you were wondering what else you can do to find pain relief maybe you should ask your local chiropractor or doctor about Low Level Laser Therapy (LLLT).
- University of Johannesburg Laser Research Group Publications
- World Association for Laser Therapy (WALT)