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Author Archives: James Carroll
LLLT reduces postoperative trismus and swelling after third molar surgery
RCT evaluation of LLLT on postoperative trismus and edema after third molar extraction on 32 patients.
2mins @ 33 mW/cm2 808nm CW
Conclusion LLLT reduces postoperative trismus and swelling
Posted in PBM/LLLT
on LLLT reduces postoperative trismus and swelling after third molar surgery
Latest LLLT / Cold Laser Literature watch with abstracts Jan 09
Our latest LLLT literature review with 20 abstracts including another muscle fatigue paper from Brazil, two Oral Mucositis papers, a “strong” rating for laser on myofascial trigger points in a Chiropractic systematic review and a Carpal Tunnel Syndrome clinical trial paper.
Posted in PBM/LLLT
on Latest LLLT / Cold Laser Literature watch with abstracts Jan 09
LOW LEVEL LASER / PHOTOBIOMODULATION DOSIMETRY. WHAT ARE THE THRESHOLDS AND WHAT ARE THE LIMITS?
James D Carroll FRSM, AMInstP, THOR Photomedicine Ltd, United Kingdom
Photobiomodulation includes biostimulation and bioinhibition. In vitro, in vivo and clinical studies have established that there are radiant intensities and energy thresholds below which no significant cellular stimulation or clinical effects are achieved. Conversely there are radiant intensities and total fluence thresholds above which cellular stimulation decreases from its peak effect and inhibition is achieved. Many dose-ranging studies have been published using a variety of laboratory and clinical models and most suggest that cellular stimulation is achieved at radiant intensities in the range of 5 – 50mW/cm2 (at the target tissue ) and that exceeding these levels can inhibit cellular function.
So what is the role of the higher intensity laser products that appear to be popular with some clinicians and their patients ?
Posted in PBM/LLLT, Special Feature
on LOW LEVEL LASER / PHOTOBIOMODULATION DOSIMETRY. WHAT ARE THE THRESHOLDS AND WHAT ARE THE LIMITS?
LED Phototherapy kills MRSA @ 405nm
Congratulations to Chukuka et al for taking the inititive to do this work. The outcomes of this high “dose” / short wavelenght invitro study come as no surprise as this effect has been forecast for some time. For decades that UV light has bactericidal effects but that it can also have carcinogenic effects. 405nm is blue light (just outside the range) so should should be a safer option.
Posted in PBM/LLLT
on LED Phototherapy kills MRSA @ 405nm
Latest LLLT literature review with abstracts
Our latest LLLT literature review with abstracts including muscle fatigue, TMJ, myofacial pain, acne and a possible application for morphine withdrawal.
Posted in PBM/LLLT
on Latest LLLT literature review with abstracts
Good laser safety advice on Wikipedia
I stumbled upon the wikipedia entry for laser safety and I consider it to be a good summary. It deals with all classes of lasers, not just Class 3B commonly used in LLLT. http://en.wikipedia.org/wiki/Laser_safety
Posted in PBM/LLLT
on Good laser safety advice on Wikipedia
How much laser is enough? and how much is too much ?
In a recent systematic review and meta analysis of laser therapy on tendinopathies (Tumilty et al), 11 out of 20 studies failed to produce a positive result. The reason identified for the ineffective studies were that the laser beams were too strong (the irradiance was too high for this particular pathology). Most clinicians are rightly confused about which laser to choose and which dose or technique will work.
Posted in PBM/LLLT, Rants
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