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.
Total knee replacement surgery involves removing a diseased knee joint and replacing it with an artificial knee joint made of plastic or metal materials. Total knee replacement is usually performed to treat advanced arthritis of the knee. Research Hospital Ratings, Talk to Your Doctor All hospitals strive to offer great medical careâbut some do a better job than others. Use Healthgrades to research hospital performance in total knee replacement and talk to your doctor about whatâs right for you. Worse than Expected As Expected