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.
Unicompartmental knee replacement, also known as partial knee replacement, is an option for a small percentage of patients who have been diagnosed with osteoarthritis that is limited to just one area of the knee. 1  The procedure requires the damaged portion of the knee to be replaced with metal and plastic components.