How Laser Therapy Works
At a cellular level there are photoreceptors that, when stimulated by deep penetrating
photons, activate a biochemical cascade of events resulting in increased DNA/RNA
synthesis, increased cAMP levels, protein and collagen synthesis and cellular
proliferation. The product of these reactions is a rapid regeneration, normalization and
healing of damaged cellular tissue. Photonic stimulation is the trigger for these
Safe and Efficient Pain Relief
Biological Effects of Therapeutic Laser Therapy
• Analgesia through the release of endorphins and a decrease in the bradykinin levels.
• Immediate inflammation reduction
• Reduction of fibrous tissue formation
• Improved vascular activity
• Increased metabolic rate within tissues
• Improved nerve function
• Stimulation of trigger and acupuncture points
• Accelerated tissue repair and cell growth
Low level laser therapy has been investigated and applied clinically for more than 30 years.
The expansion of laser therapy for pain management, inflammatory reduction and accelerated healing has driven the need for higher power output levels and longer wavelengths resulting in deeper tissue penetration. The trend in laser therapy over the past ten years has been to increase power density and dose. This has been shown to significantly improve therapeutic outcomes. Early therapeutic lasers offered a power output of perhaps 5mW, current FDA cleared systems can provide up to 15,000 mW (15 Watts) power output. Low level laser therapy (LLLT) performed with Class IV lasers employ wavelengths in the 808nm and 980nm range.
When deep penetrating photobiostimulation occurs there is pain relief, a reduction of inflammation and an accelerated tissue healing time. The best clinical results are achieved when a sufficient number of photons reach the target tissue. The therapeutic dose is measured in Joules (J) delivered per cm. The World Association of Laser Therapy (and other authorities) have established that target tissues need a dose of 5-7 J/cm to elicit a biological cellular response. Controlled clinical studies on laser therapy have demonstrated that the most common reasons for poor clinical outcomes are related to inadequate power, dosage, short wavelengths and non-scientific treatment protocols. Some treatment protocols have been developed to accommodate older, lower power laser systems. However, newer, higher power systems coupled with protocols based on the scientific literature have been shown to produce the best therapeutic results.
Tissue that is damaged and poorly oxygenated as a result of swelling, trauma or inflammation has been shown to respond significantly to laser therapy. At the cellular level, deep penetrating photons activate a biochemical cascade of events leading to increased DNA/RNA, protein and collagen synthesis, increased cAMP levels, and cellular regeneration, normalization, and healing.
Laser light energy is highly absorbed by skin and subcutaneous tissue, therefore, penetration is key to therapeutic result. Longer wavelengths and higher power output result in deeper penetration and higher dosage to the tissue. Larger outcomes as illustrated in the case and interventional studies cited above. LLLT (classes I-III) does not provide optimal clinical outcomes in most disease conditions, because they cannot deliver the necessary dosage to deep structures without using excessively long treatment times. Class IV lasers have been shown to provide both the wavelengths and the output power levels necessary to trigger therapeutic cellular metabolic changes.