The artificial total knee joint consists of a femoral prosthesis, a tibial prosthesis and a patellar prosthesis, and is composed of a metal femoral condyle, a tibial buttress, and a tibial pad and patellar prosthesis made of ultra-high-molecular-weight polyethylene-based materials. Cobalt/or titanium alloy, which has good histocompatibility with the human body, and ultra-high molecular weight polyethylenes, which are resistant to wear and tear, are the two biomaterials commonly used in artificial knee joints today. Total knee arthroplasty replaces the severely damaged surface of the knee joint with an artificial prosthesis that is unable to perform normal functions, thereby eliminating pain, correcting deformity, restoring stability and mobility, and improving quality of life. The surgeon uses special precision instruments to cut away the worn joint surface and then selects the appropriate metal and polyethylene prosthesis for you based on the size of your joint and the extent of the damage, more like a surface replacement. The decision to replace the patellofemoral articular surface is made by the surgeon on the operating table based on the severity of your patellofemoral articular surface damage. Not every patient’s patella will require a patellar prosthesis. There are two main types of fixation for the artificial knee: cemented and uncemented. The most widely used is cemented fixation, which allows the patient to be on the floor the day after surgery and to start walking after 3-4 days.