Collagen Deposition and Biomechanical Behavior During the Healing Process of Gastrocnemius Muscle Injury Treated by Ultrasound in Rats

摘要

Considering that ultrasound (US) treatment stimulates collagen deposition, and that the collagen maturation process can contribute to greater mechanical strength a quantitative study was undertaken in which histological findings of collagen were correlated with biomechanical data from lacerated rat muscle, treated by pulsed US.After lesioning, rats were randomly divided into 2 groups: The US group was treated daily with 1 MHz pulsed ultrasound 50% at 0.57 W/cm. for 5 min, and the Control group that received no treatment. Each group was further divided into subgroups (n = 5) for histological and biomechanical evaluation at postoperative (p.o.) days 4, 7, 14 and 24.