There are several devices that have been employed to deliver LLLT to the scalp with the purpose of stimulating hair growth. They can be divided into three broad categories (i) laser comb type devices that deliver light to the scalp with some mechanical action needed to part the hair provided by the user; (ii) laser cap type devices that are worn on the head by the user and provide4 light to the whole scalp at one time; (iii) laser hood type devices; these are used at spas and clinics and are similar to a hair dryer with a hood that covers the head. The light that is used Is most frequently coherent laser light rather than non-coherent LED light and the wavelengths are mostly in the red range (630-670 nm) but some infrared is also used either alone or combined with red.
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Low level laser therapy (LLLT) is a technology used to treat or heal conditions like inflammation rheumatoid arthritis, osteoarthritis, acute and chronic neck pain It can help regenerate tissue, reduce inflammation, decrease pain, and increase immunity.and also can be used to create physiological changes in tissue. Low level laser therapy (LLLT) is the best accepted as a rehabilitator and the devices are considered as therapeutic laser.