The categorization of people by social strata occurs in all societies, ranging from the complex, state-based societies to tribal and feudal societies, which are based upon socio-economic relations among classes of nobility and classes of peasants.
Knee replacement, also known as knee arthroplasty, is a surgical procedure to replace the weight-bearing surfaces of the knee joint to relieve pain and disability. It is most commonly performed for osteoarthritis,[1] and also for other knee diseases such as rheumatoid arthritis and psoriatic arthritis.
Mayo Clinic in Minnesota has been recognized as one of the top Orthopedics hospitals in the nation for 2016-2017 by U.S. News & World Report. Knee replacement surgery â also known as knee arthroplasty (ARTH-row-plas-tee) â can help relieve pain and restore function in severely diseased knee joints.