Total Knee Replacement

Medical Author: William C. Shiel Jr., MD, FACP, FACR
Medical Editor: Dennis Lee, MD

• What is a total knee replacement?
• What patients should consider a total knee replacement?
• What are the risks of undergoing a total knee replacement?
• What is involved with the preoperative evaluation for total knee replacement?
• What happens in the postoperative period?
• How does the patient continue to improve as an outpatient after discharge from the hospital?
• Total Knee Replacement At A Glance

What is a total knee replacement?

A total knee replacement is a surgical procedure whereby the diseased knee joint is replaced with artificial material. The knee is a hinge joint which provides motion at the point where the thigh meets the lower leg. The thigh bone (or femur) abuts the large bone of the lower leg (tibia) at the knee joint. During a total knee replacement, the end of the femur bone is removed and replaced with a metal shell. The end of the lower leg bone (tibia) is also removed and replaced with a channeled plastic piece with a metal stem. Depending on the condition of the kneecap portion of the knee joint, a plastic "button" may also be added under the kneecap surface.

The posterior cruciate ligament is a tissue that normally stabilizes each side of the knee joint so that the lower leg cannot slide backward in relation to the thigh bone. In total knee replacement surgery, this ligament is either retained, sacrificed, or substituted by a polyethylene post. Each of these various designs of total knee replacement has its benefits and risks.

From the Doctors at MedicineNet.com

Rheumatoid Arthritis - Learn more about rheumatoid arthritis, an autoimmune disease that causes chronic joint inflammation, which has symptoms that include stiffness, fever, muscle and joint aches, loss of appetite, and fatigue. Treatment of rheumatoid arthritis incorporates the use of first-line drugs (aspirin and corticosteroids for pain and inflammation) and second-line drugs (methotrexate and hydroxychloroquine to prevent joint destruction and promote remission). Source:MedicineNet Osteoarthritis - Osteoarthritis (degenerative arthritis) is a joint disease caused by the breakdown and loss of the cartilage of one or more joints. With repetitive use, pain, swelling, warmth, and creaking may be noticed in the affected joint. Though weight loss and avoiding stress on the joint will reduce joint pain and inflammation, there is no specific treatment for osteoarthritis. Source:MedicineNet Aseptic Necrosis - Find out more about aseptic necrosis (avascular necrosis or osteonecrosis), a condition that develops when blood supply diminishes to an area of bone and causes bone death. Though aseptic necrosis may be painless, pain is often associated when the degenerating bone is used. If caught early, aseptic necrosis may be treated by grafting new bone into the degenerating area. In later stages, joint replacement surgery may be required. Source:MedicineNet Read 39 more Total Knee Replacement related articles ... Biking, Walking Best for New Knees Is There a Gender Bias in Knee Replacement? Total Knee Replacement Safe for Most Patients