The purpose of this study is to investigate the effect of overdose ultrasound on the articular cartilage of the osteoarthritic knee in adult albino rate. The US is considered the most popular and effective treatment for osteoarthritis as it can penetrate deep tissue reaching internal structures which allow it to be effective for osteoarthritis treatment. Previous researches apply US as a treatment for different cases with different intensity and repetition, but no one has actually proven the frequency of this use or the effect of excess use on cells, so the investigators need evidence to determine the optimum therapeutic dose and frequent repetition which should determine the effect of more than one session on the joint cartilage and cells and if it has a positive or negative effect and this is the main goal in this study which is limited in all studies concerning the US.
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Samples to estimate the knee cartilage thickness (femoral cartilage)
Timeframe: at the begginig of the experiment and at the end
Samples to detect the morphology and the histological changes in cartilage matrix
Timeframe: at the begginig of the experiment and at the end
Cellular changes
Timeframe: at the begginig of the experiment and at the end
Inflammatory changes
Timeframe: at the begginig of the experiment and at the end