Best Knee Replacement Surgeon in Delhi Arthroplasty is a process that involves cutting away the damaged parts of the bone and cartilage from your knee and replacing it with an artificial joint also known as a prosthesis. The prosthesis is usually made of alloys, high-grade plastics, and polymers. Knee replacement surgery helps in relieving pain in highly damaged knees. As a result, it also restores your mobility and function.