New knowledge of osteoarthrosis must be gained if (he later years of our lengthening lives are not to be plagued by increasing pain and disability. Osteoarthritis is the most common form of arthritis. Because of the aging of the population, the prevalence of osteoarthritis is expected to increase [2], Because of its high prevalence, osteoarthritis in the knee accounts for as much or more lower extremity disability than any other disease [3], It is the main reason why patients undergo total knee and hip replacements.
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