Knee replacement surgery is done to relieve severe pain and disability, usually from arthritis. The damaged surfaces of the knee joint (cartilage and bone) are removed. Artificial components made of metal and plastic are used to replace them. The surgery can involve total knee replacement or partial knee replacement. It is usually performed under spinal or general anesthesia. The operation takes about 1–2 hours. Patients start walking with support within a day or two. Physiotherapy is essential for recovery and regaining movement. Most patients experience reduced pain and improved mobility. Implants usually last 15–20 years, depending on activity level and care Advantages and disadvantages of knee replacement surgery Best country for knee replacement surgery Best knee replacement surgery in Chennai going back to work after knee replacement surgery How much it cost for knee replacement surgery