Ultrasound is a mechanical energy that can be conducted into the body when it reaches a certain high frequency of sound waves. In clinical practice, the ultrasound transduction probe must be applied directly to the skin of the treated area for 20 minutes per day. Possible mechanisms of ultrasound stimulation of fracture healing: intensification of specific enzymatic activities; upregulation of osteoblastic signaling channels; release of growth factors; increase in the expression of specific genes; increase in the production of nitric oxide, which leads to the production of vascular endothelial growth factor by osteoblasts, resulting in vascular regeneration, chondrocyte and osteoblast differentiation; promotion of osteoblast differentiation and bone calcification matrix production; promotion of fracture repair in all segments repair and accelerate the biomechanical aspects of repair. Ultrasound in the treatment of fractures Fresh fractures Fractures do not heal.