TY - JOUR AU - da Silva, Rodrigo Marcel Valentim AU - Cavalcanti, Rafael Limeira AU - Félix, Bruno Felipe Soares AU - Coutinho Santos, Rodney Wordnei AU - da Cunha, Tamara Martins AU - Ronzio, Oscar Ariel AU - Meyer, Patrícia Froes PY - 2020/11/19 Y2 - 2024/03/29 TI - Effects of radiofrequency on muscle tissue regeneration JF - Manual Therapy, Posturology & Rehabilitation Journal JA - mtprehabjournal VL - 18 IS - 0 SE - Research articles DO - 10.17784/mtprehabjournal.2020.18.787 UR - https://submission-mtprehabjournal.com/revista/article/view/787 SP - 1-8 AB - <p>Background: Radiofrequency (RF) is recommended to treat pathologies with the presence of inflammation, as it induces diathermy<br>and, consequently, promotes better oxygenation, nutrition and local vasodilation. Objective: Evaluate the effect of RF on muscle<br>regeneration in Wistar rats. Methods: It is a controlled and randomized experiment, with a sample composed of 40 Wistar rats,<br>divided equally into four groups: G1 (control group), G2 (lesion, without RF), G3 (RF after 72 hours of lesion) and G4 (RF after 7 days<br>of lesion), all sacrificed 21 days after the injury. The RF parameters used were: Sine wave; frequency of 0.5MHz; 5 cm² treatment<br>area on the region around the lesion; power of 45%; two-minute application; intensity of 15 seconds to heat the head, 1 minute at<br>20% and another minute at 10%. An optical microscope was used for histological analysis and, for the biomechanical properties<br>(maximum elongation and maximum load), the mechanical traction test of the gastrocnemius muscles. For statistical analysis, the<br>two-way ANOVA test and the Benferroni test were used, considering 5% of significance. Results: It was observed in G3 that the<br>inflammatory process was optimized by the RF when compared to the other groups, presenting intact muscle fibers with a discreet<br>regeneration process. G4, on the other hand, revealed intense inflammation with significant granulation tissue, as well as fibrosis and<br>healing. As for the biomechanical characteristics, there were no statistically significant differences in the intergroup comparison.<br>Conclusion: RF was more effective when applied after 72 hours after the injury, in addition to not interfering with muscle<br>biomechanical characteristics.</p> ER -