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Knee arthroplasty, also known as knee replacement surgery, involves replacing painful, deformed, or unstable knee joints with artificial implants. It is a surgical procedure used to treat severe knee arthritis and damage from other causes like injury. There are two main types of knee replacements - total knee replacement that replaces the entire joint, and partial/half knee replacement that replaces only parts of the joint. Knee replacement surgery is recommended for those over 50 years old whose knee pain significantly limits mobility and daily activities, and who have not found relief from other treatments like medication and physical therapy.Read less