Low-energy helium-neon laser ensures knee cartilage repair: An experimental short-term assay in rabbits

Low-energy helium-neon laser ensures knee cartilage repair: An experimental short-term assay in rabbits

Autor Peccin, Maria Stella Autor UNIFESP Google Scholar
Silva, Paulo Ricardo Giusti da Autor UNIFESP Google Scholar
Muniz Renno, Ana Claudia Autor UNIFESP Google Scholar
Ribeiro, Daniel Araki Autor UNIFESP Google Scholar
Instituição Universidade Federal de São Paulo (UNIFESP)
Resumo Objectives. the purpose of this study was to evaluate the influence of low-power helium-neon laser oil cartilage damage using all experimental short-term assay in rabbits. Material and Methods. A total of 21 adult male New Zealand rabbits underwent bilateral knee cartilage damage using a spherical bur. Helium-neon laser light with power of 6 J/cm(2) and wavelength of 632.8 nm was applied on the left knees submitted to surgical procedures only. the right knees lesions served as negative control (nonexposed to laser therapy). All animals were randomized and seven animals were killed at postoperative clays 7, 21, and 40 days. Results. At seven days, similar histopathological patterns were noted for laser exposed and nonexposed knees. At 21 days, the control group showed an organized fibrous tissue inside the lesion, whereas knees exposed to laser therapy pointed out a cartilage tissue tilling the lesion in the majority of treated knees. At 40 days, a well-organized fibrous tissue filled fully the lesion in the control group. On the other hand, the laser exposed knees showed a hyaline cartilage filled the lesion completely. Conclusions. Taken together, these results indicate that a low-energy laser is able to induce cartilage neoformation after 40 clays following therapy. (C) 2008 Laser Institute America.
Assunto cartilage damage
helium-neon laser
Idioma Inglês
Data 2008-08-01
Publicado em Journal of Laser Applications. Orlando: Laser Inst Amer, v. 20, n. 3, p. 165-168, 2008.
ISSN 1042-346X (Sherpa/Romeo, fator de impacto)
Editor Laser Inst Amer
Extensão 165-168
Fonte http://dx.doi.org/10.2351/1.2955555
Direito de acesso Acesso restrito
Tipo Artigo
Web of Science WOS:000259388200006
URI http://repositorio.unifesp.br/handle/11600/30843

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