Effect of phototherapy with light-emitting diodes (890 nm) on tendon repair: an experimental model in sheep

Abstract

The effect of phototherapy with 890-nm light-emitting diodes (LEDs) on the healing of experimentally induced tendinitis in sheep was evaluated in this study. Partial tenotomies measuring 0.2 cm wide × 0.5 cm long were performed on the second third of the superficial digital flexor tendons of 10 healthy sheep. The animals were divided into two groups: "treated" (TG), treated with LEDs at the aforementioned wavelength, and "control" (CG), a control group treated with a placebo. Kinesiotherapy, which consisted of 5-min walks on grassy ground, was performed on both groups. B-mode and power Doppler ultrasonographies (US) were performed to evaluate the tendon healing process during the first 14 days after surgery and on the 21st and 28th postoperative days. Biopsies were performed on day 28 for the histopathological assessment of neovascularisation and the pattern of the tendon fibres. The absence of lameness and a significant improvement (p < 0.05) in the sensitivity to pain during palpation were observed in the treated group. Furthermore, a significant reduction in oedema and an increased number of vessels (p < 0.05) were observed in this group with the B-mode and power Doppler US, respectively. No significant difference in the evolution of the lesion was found. There was a histological difference (p < 0.05) in neovascularisation in the treated group. Phototherapy with 890-nm light-emitting diodes decreases the inflammatory process.

Transdentinal photobiostimulation of stem cells from human exfoliated primary teeth

“…, de Mattos et al . ). Despite these positive results, the effects of light on pulp tissue have been little investigated.…”

“…Phototherapy has been reported as an interesting alternative for tissue repair, showing promising results in ex vivo studies , Holder et al 2012, Teuschl et al 2015 and animal models (Ferreira et al 2006, de Mattos et al 2015. Despite these positive results, the effects of light on pulp tissue have been little investigated.…”

Effect of norbixin-based poly(hydroxybutyrate) membranes on the tendon repair process after tenotomy in rats

“…In addition, fatty acids facilitate the action of growth factors, humidifying the environment and stimulating the formation of granulation tissue, which accelerates the healing process. In contrast, the tendon is known to be a poorly vascularized tissue, which consequently has low nutrition and oxygenation demands, and thus has a low capacity for tissue repair 24 . This accounted for the significant presence of inflammatory cells at the end of day 21.…”

O uso terapêutico do LASER de Baixa Intensidade (LBI) em algumas patologias e sua relação com a atuação na Fonoaudiologia

“…Essas fases apresentam características específicas e fundamentais para a adequada restauração da estrutura e função do tecido muscular lesado 14,15 . f) Regeneração de nervos periféricos -Nervos periféricos são alvo constante de lesões traumáticas que podem resultar em déficits motores com o decorrer do tempo que alteram suas propriedades mecânicas e neuroquímicas, bem como podem proporcionar complicações irreversíveis 3,12,[16][17][18] . g) Efeito anti-bactericida: A terapia fotodinâmica (PDT) é uma modalidade de fototerapia que se utiliza do LASER vermelho associado a um fotossensibilizador (ou corante, que geralmente Deste modo, esse tipo de radiação é utilizado com fins terapêuticos e, para que tal finalidade seja atingida, os comprimentos de onda geralmente utilizados são o vermelho e o infravermelho.…”