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.
Overview Also known as Arthrodesis.Two percent of primary and 8% of revision total knee replacements are followed by knee fusion, or arthrodesis. Knee fusion is a salvage procedure performed when a total knee replacement fails, usually due to infection, or when the risk of failure of total knee replacement is high.nee fusion is a salvage procedure performed when a total knee replacement fails, usually due to infection, or when the risk of failure of total knee replacement is high.