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The effects of low-level light emitting diode on the repair process of Achilles tendon therapy in rats

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Abstract

Thirty Wistar rats (350 ± 20 g) were subjected to total Achilles tendon tenotomy of the right fore limb. They were submitted to a daily dose of 20 J/cm2 light emitting diode (LED) (640 ± 20 nm) therapy. The LED was applied punctually and transcutaneously to the lesioned region. The animals were separated into six groups, C1 and L1, C2 and L2, C3 and L3. The C groups were used for control and the L groups, treated for 7, 14 and 21 consecutive days, respectively. The animals were killed on the 7th, 14th and 21st days after surgery. After the animals had been killed, their tendons were extracted and dissected, fixed in formaldehyde at 10%, and sent for histological analysis by light microscopy in which the repair process was analysed. This study demonstrated that LED interfered in the repair process of the tendon tissue, reducing the number of fibroblasts in the initial periods and improving the quality of the repair in all periods studied.

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Authors and Affiliations

  1. Instituto de Pesquisa e Desenvolvimento, Universidade do Vale do Paraíba, Avenida Shishima Hifumi, 2911, Urbanova, São José dos Campos, São Paulo, Brasil

    Heliodora L. Casalechi, Renata A. Nicolau, Vitor L. Casalechi, Landulfo Silveira Jr. & Marcos T. T. Pacheco

  2. Laboratório de Pesquisa em Saúde, Hospital Universitário Clemente de Faria, Universidade Estadual de Montes Claros, Montes Claros, Minas Gerais, Brasil

    Alfredo M. B. De Paula

Authors
  1. Heliodora L. Casalechi
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  2. Renata A. Nicolau
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  3. Vitor L. Casalechi
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  4. Landulfo Silveira Jr.
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  5. Alfredo M. B. De Paula
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  6. Marcos T. T. Pacheco
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Correspondence to Renata A. Nicolau.

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Casalechi, H.L., Nicolau, R.A., Casalechi, V.L. et al. The effects of low-level light emitting diode on the repair process of Achilles tendon therapy in rats. Lasers Med Sci 24, 659–665 (2009). https://doi.org/10.1007/s10103-008-0607-6

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  • DOI: https://doi.org/10.1007/s10103-008-0607-6

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