This procedure restores function to a severely damaged knee. Most commonly, it is used to repair a knee that has been damaged by arthritis. During the procedure, Dr. Moore replaces the damaged portions of the knee with artificial parts. These parts consist of a metal femoral component, a metal tibial component and a plastic spacer. A small plastic patellar component may also be used.
The bone and cartilage on the end of the thigh bone (femur) and top of the shin bone (tibia) are removed. This is performed using precise instruments to create surfaces that can accommodate the implant perfectly. A metal and plastic knee replacement is then placed in to function as a new knee joint. Depending on the condition of the cartilage underneath the kneecap, the kneecap surface may also be replaced.
Knee replacements are most often cemented into position. Dr. Moore may opt to place press-fit impacts, usually on the end of the thigh bone, in some patients; however, most commonly the knee implants are cemented. Cemented implants fit tightly to the bone. Around the impact is a hard surface often referred to as cement or glue. This hard substance acts as a space filler or grout, and holds the implant solidly in position.