Jump to main content
Jump to site search

Issue 8, 2018
Previous Article Next Article

Photobiomodulation: lasers vs. light emitting diodes?

Author affiliations

Abstract

Photobiomodulation (PBM) is a treatment method based on research findings showing that irradiation with certain wavelengths of red or near-infrared light has been shown to produce a range of physiological effects in cells, tissues, animals and humans. Scientific research into PBM was initially started in the late 1960s by utilizing the newly invented (1960) lasers, and the therapy rapidly became known as “low-level laser therapy”. It was mainly used for wound healing and reduction of pain and inflammation. Despite other light sources being available during the first 40 years of PBM research, lasers remained by far the most commonly employed device, and in fact, some authors insisted that lasers were essential to the therapeutic benefit. Collimated, coherent, highly monochromatic beams with the possibility of high power densities were considered preferable. However in recent years, non-coherent light sources such as light-emitting diodes (LEDs) and broad-band lamps have become common. Advantages of LEDs include no laser safety considerations, ease of home use, ability to irradiate a large area of tissue at once, possibility of wearable devices, and much lower cost per mW. LED photobiomodulation is here to stay.

Graphical abstract: Photobiomodulation: lasers vs. light emitting diodes?

Back to tab navigation

Supplementary files

Publication details

The article was received on 26 Apr 2018, accepted on 12 Jul 2018 and first published on 13 Jul 2018


Article type: Perspective
DOI: 10.1039/C8PP00176F
Citation: Photochem. Photobiol. Sci., 2018,17, 1003-1017
  •   Request permissions

    Photobiomodulation: lasers vs. light emitting diodes?

    V. Heiskanen and M. R. Hamblin, Photochem. Photobiol. Sci., 2018, 17, 1003
    DOI: 10.1039/C8PP00176F

Search articles by author

Spotlight

Advertisements