A prosthetic joint is an artificial device designed to replace a damaged or diseased joint in the body, such as the knee or hip. These joints are typically made from materials like metal, plastic, and ceramic, and are used to restore mobility and reduce pain in patients suffering from conditions like arthritis or injury. The procedure to implant a prosthetic joint is known as joint replacement surgery. During this surgery, the damaged joint is removed and replaced with the prosthetic device, allowing for improved function and quality of life. Rehabilitation and physical therapy are often necessary to help patients regain strength and movement after the surgery.