Knee replacement surgery, also known as knee arthroplasty, is a surgical procedure aimed at relieving pain and restoring function in individuals with severe knee joint damage, often due to arthritis or injury. During the procedure, the damaged portions of the knee joint are replaced with artificial implants made of metal and plastic.

There are two main types of knee replacement surgery: partial knee replacement, where only the damaged portion of the knee is replaced, and total knee replacement, where the entire knee joint is replaced. The choice of procedure depends on the extent and location of the damage.

After surgery, patients typically undergo a period of rehabilitation, which includes physical therapy and exercises to strengthen the surrounding muscles and improve joint flexibility. While knee replacement surgery offers significant relief from pain and improved mobility, it also carries risks such as infection, blood clots, and implant failure. However, with proper care and adherence to post-operative instructions, most patients experience substantial improvements in their quality of life and ability to perform daily activities.