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RFO UPF

versão impressa ISSN 1413-4012

Resumo

FORMIGHIERI, Renan Ribas et al. Assessment of (808 nm) infrared laser irradiation in the healing of cutaneous wounds in rats. RFO UPF [online]. 2015, vol.20, n.3, pp. 345-350. ISSN 1413-4012.

Objetive: This study aimed to assess low-level laser therapy with infrared waves, which is mostly used for bone tissue, observing its effects on the healing of cutaneous wounds in rats. Methods: 17 Wistar rats were randomly selected and distributed into two groups: the experimental group (EG) containing 9 animals, and the control group (CG) containing 8 animals. Standard wounds were performed on the calvaria skin of all the animals. In the postoperative period, the EG received low-level laser therapy, 808 nm wavelength (infrared), 100 mW power, 10 J/cm² energy density, and timely and constant application every 48 hours for 10 days. For the achievement of results, the wounds were macroscopically measured daily and microscopically (histomorphometric and histomorphologic) measured at day 10. Results: Comparing both groups, there are no marked histopathological differences, both show a reparative process with the same morphology, and the same fibroblastic response and fibrous disposition. As for reepithelialization of the EG, it was lower than the CG (p = 0.002), as well as macroscopic scale (p <0.05). Conclusion: The infrared protocol may slow down the reepithelialization process of cutaneous wounds, therefore according to studies, what is favorable for repairing hard tissues may slow down healing in soft tissues adjacent to the target hard tissue.

Palavras-chave : Laser; Histopathology; Scar.

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