Resumo

CHAGAS JUNIOR, Otacílio Luiz et al. Therapeutic laser and inflammatory cells - part 2: neutrophils. Rev. cir. traumatol. buco-maxilo-fac. [online]. 2013, vol.13, n.3, pp. 111-118. ISSN 1808-5210.

The aim of this work was study the intensity of acute inflammatory infiltrate inconnective tissue after low level laser therapy (λ = 685 nm) irradiation. Eighteen maleWistar rats (250 to 300 grams) with standardized surgical wounds were randomlydistributed into 6 groups - 3 study groups with 4 rats each, and 3 control groups with2 rats each. In the study groups, four equidistant spots around the standardizedwound were irradiated (0.5 J/ cm², 35 mW, 35 Hz, 17 seconds). The control groupswere not irradiated. The animals were killed at 6, 12 and 24 hours after laser therapy.Biological specimens were harvested and routinely processed. The total number of granulocyteswascounted using the stereological method. A non-statistically significant decrease in thetotal number granulocytes was observed in the all study groups. Our results showedthat one single irradiation with laser light reduced the total number of graunulocytesin the animal model used in this study.

Palavras-chave : low level laser therapy (LLLT); granulocytes; hematoxiline and eosine; stereological method..