Knee
Total knee replacement surgery involves removing the diseased portion of the knee joint. An artificial knee, known as prosthesis, replaces it. There are generally three parts (components) to an artificial knee. The femoral prosthesis is placed on the end of the thighbone. The tibial prosthesis is placed on top of and covers the shinbone. The patellar prosthesis covers the underside of the kneecap. These implants are usually cemented in place and are most commonly made of metal and plastic. Special instruments are used to shape the bones for an exact fit, which is important for smooth, pain-free movements as the knee bends and straightens.
Your orthopedic surgeon will decide whether you will need just one or all three of these parts. The surgery usually takes approximately 1 � hours for one knee joint or 2 ½ hours for two knee joints, depending on the condition of your knee.