Evaluation of therapeutic ultrasound (0.5 Watt/cm² Vs 1.0 Watt/cm²) in bone healing in dogs: Clinical and radiographic studies

Ten clinically healthy adult dogs of either sex weye used for the present study. A midshaft diaphyseal defpct of 2 cm was created inethe right radius in all the animals. This gap was maintained by a 4 hole-neutralization plate, fixed on the craniolateral aspect of radius. The gap was filled with autogenous cortical bone fragments (ACBF) of 2–5 mm diameter made from a piece of bone removed from the radius. The animals were randomly divided into 2 groups (groups I and 11) of 5 animals each. Pulsed ultrasound therapy (USTI @ 0.5 Watt/cm² and 1.0 Watt/cm² was applied inanimals of group I and II, respectively at the graft site. The UST was applied on day 4 after grafting for 10 min daily for 10 days. Early weight bearing both on standing and during walk was observed in animals of group I as compared to that of group II. The radiographs taken on duy 60 revealed good amount of radio-dense callus invading the graft areafrom bone edges in group I, which was indicative of early and better fracture healing as compared to that ingroup II.