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.
Microfracture is an arthroscopic procedure performed to repair damaged knee cartilage for patients with cartilage injuries or only a minimal amount of damage. This procedure often helps patients avoid or postpone the need for knee replacement surgery while effectively relieving pain and swelling in the affected area.