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Fisioterapia em Movimento

On-line version ISSN 1980-5918


GONCALVES, Reggiani Vilela et al. Influence of gallium-aluminum arsenide laser in the cutaneous wounds in wistar rats. Fisioter. mov. (Impr.) [online]. 2010, vol.23, n.3, pp.381-388. ISSN 1980-5918.

OBJECTIVE: The present work evaluates the effect of the gallium-aluminum arsenide (GaAsAl) (30j/cm2) laser and ointment DersaniTM, on the cutaneous cicatricial process the wistar rats, in respect of fibroblast proliferation and revascularization. MATERIALS AND METHODS: The study made use of 18 wistar rats, young adults, males, with medium weight of 324 g, from the animal house of Centro de Ciências Biológicas e da Saúde (Health and Biological Sciences Center) of Universidade Federal de Viçosa, MG, Brazil. Five 12 mm wounds were made in the dorsal region of the rats using scalpel blades. Animals were separated in 3 groups, each one with six animals. Group 1: Control - Animals had the wound treated with saline; Group 2: Wound treated with GaAsAl (30J/cm2) laser; and Group 3: wound treated with DersaniTM. The applications were made daily during 20 days of experiment. The material for histological analyses was stained with hematoxilin-eosin (HE), photographed and analyzed using the program Image Pro-plusTM through enumeration of points under the cells of interest. RESULTS: It was observed an increase in the number of fibroblasts in the groups treated with GaAsAl 30J/cm2 and with DersaniTM ointment when compared to controls in the fourth day of experiment. However, in the eighth day the group treated with laser presented a significant reduced number of fibroblasts when compared to control and DersaniTM groups. In relation to revascularization, significant differences between laser and DersaniTM were observed in the eighth day of the experiment, where to DersaniTM showed to be more effective in the formation of blood vessels. CONCLUSION: The group GaAsAl laser on the fourth day, there was a significantly greater quantity of fibroblasts compared to control group.

Keywords : Cicatrization; Revascularization; GaAsAl laser; Cutaneous wounds.

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