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Lasers Med Sci. 2012 May;27(3):629-35. doi: 10.1007/s10103-011-1008-9. Epub 2011 Oct 19.

Low-level laser therapy improves repair following complete resection of the sciatic nerve in rats.

Author information

1
Department of Bioscience, Federal University of São Paulo (UNIFESP), Avenida Ana Costa 95, CEP 04021-001, Santos, SP, Brazil. cmedalha@unifesp.br

Abstract

The aim of this study is to analyze the effects of low-level laser therapy (LLLT) on the regeneration of the sciatic nerve in rats following a complete nerve resection. Male Wistar rats were divided into a control injury group, injury groups irradiated with a 660-nm laser at 10 or 50 J/cm(2), and injury groups irradiated with an 808-nm laser at 10 or 50 J/cm(2). Treatment began 24 h following nerve resection and continued for 15 days. Using the sciatic functional index (SFI), we show that the injured animals treated with 660 nm at 10 and 50 J/cm(2) had better SFI values compared with the control injury and the 808-nm groups. Animals irradiated with the 808-nm laser at 50 J/cm(2) show higher values for fiber density than do control animals. In addition, axon and fiber diameters were larger in animals irradiated with 660 nm at 50 J/cm(2) compared to the control group. These findings indicate that 660-nm LLLT is able to provide functional gait recovery and leads to increases in fiber diameter following sciatic nerve resection.

PMID:
22009383
DOI:
10.1007/s10103-011-1008-9
[Indexed for MEDLINE]

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