Study of the therapeutic efficacy of ultrasound in experimental model of tendinitis in Wistar rats

Abstract

Introduction: The therapeutic ultrasound accelerates repair of tendon. Objectives: Analyze the action of ultrasound in experimental tendonitis in histomorphometric and histopathological analysis. Methods: Twenty-five Wistar rats, 220 – 250 g, were divided into three experimental groups (7 and 14 days): A7 and A14 induced tendinitis and without treatment; B7 and B14, induced tendinitis and treated with pulsed ultrasound 1 MHz to 10% 0.5 W/cm², and C, the group without induction of tendinitis. Results: Histomorphometry was highly significant (p <0.001) of ultrasound against the clock for 14 days, compared with the healthy group (C), and very significantly in relation to the same group tendinitis (A7 and A14) (p <0, 01). Conclusion: The histology and histomorphometry demonstrated qualitatively and quantitatively, an increased number of fibroblasts in seven days, and the collagen fibers, in 14 days, for the group of ultrasound compared with the group of tendinitis.