A knee replacement (also called knee arthroplasty) might be more accurately termed a knee “resurfacing” because only the surface of the bones are actually replaced.
There are four basic steps to a knee replacement procedure.
- Prepare the bone. The damaged cartilage surfaces at the ends of the femur and tibia are removed along with a small amount of underlying bone.
- Position the metal implants. The removed cartilage and bone is replaced with metal components that recreate the surface of the joint. These metal parts may be cemented or “press-fit” into the bone.
- Resurface the patella. The undersurface of the patella (kneecap) is cut and resurfaced with a plastic button. Some surgeons do not resurface the patella, depending upon the case.
- Insert a spacer. A medical-grade plastic spacer is inserted between the metal components to create a smooth gliding surface.
- Patients with severe destruction of the knee joint associated with progressive pain and impaired function may be candidates for total knee replacement.
- Osteoarthritis is the most common reason for knee replacement operation in the India.
- Risks of total knee replacement surgery have been identified.
- Physical therapy is an essential part of rehabilitation after total knee replacement.
- Patients with artificial joints are recommended to take antibiotics before, during, and after any elective invasive procedures (including dental work).