The mechanical and thermo-thermal effects of ultrasound can promote several physicochemical changes.
a. Diffusion effect: ultrasound can improve the permeability of the biofilm, potassium, calcium ions, the permeability of a strong change. Thus, it enhances the diffusion process of biofilm, promotes material exchange and improves tissue nutrition.
b. Thixotropic effect: Under the action of ultrasound, the gel can be transformed into a sol-gel state. The softening effect on muscle, tendon, and on some pathological changes related to tissue dehydration. Such as rheumatoid arthritis lesions and joints, tendons, ligaments in the treatment of degenerative lesions.
c. Cavitation: cavitation is formed, either by unidirectional vibration that remains stable, or secondary to swelling to the point of collapse, with altered cellular function and increased intracellular calcium levels. Fibroblasts are activated, protein synthesis increases, vascular permeability increases, angiogenesis is accelerated, and collagen tension increases.
d. Polymerization and depolymerization: small molecule polymerization is the process of synthesizing multiple identical or similar molecules into one larger molecule. Macromolecular depolymerization is the process of turning a large chemical into a small molecule. It can lead to increased hydrolase and proenzyme activity in the joints.
e.Anti-inflammatory, repair of cells and molecules: the action of ultrasound can make the tissue PH value to the alkaline side. Relieves local acidosis associated with inflammation. Ultrasound can affect blood flow, produce inflammation-causing effects, inhibit and play an anti-inflammatory role. It moves white blood cells and promotes angiogenesis. This leads to the process of cleaning, activating and repairing damaged cell tissues.