60 subjects with grade II knee osteoarthritis will be recruited from outpatient clinic of faculty of physical therapy and then they will be assigned randomly by sealed envelope into three groups ;group A (shock wave group) will received radial extracorporeal shock wave ,group B (Iontophoresis group ) will receive deaxamthasone iontophoresis and group c (control group) will receive traditional tratment ( stregnthening exerciseces) all treatment will be once session per week for four weeks .pain intensity ,knee ROM and knee injury and osteoarthritis outcome score physical function short (KOOS-PS).
Both extra corporeal shock wave and dexamethasone iontophoresisare effective in treatment of knee osteoarthritis but which one is more effective is not clear yet . so the purpose of this study was to investigate and compare between the effect of shock wave and iontophoresis in treatment of knee osteoarthritis . it was hypothesized that there will be no difference between the effect of shock wave and iontophoresis on treatment of knee osteoarthritis.