Anatomy

Total knee replacement

The knee is a hinge joint, meaning it can only bend in one direction. It is where the tibia, the femur, and the patella meet. Like most joints in the body, the knee joint is lined with articular cartilage. The articular cartilage acts as a shock absorber and allows smooth and stable movement. When the articular cartilage wears away, knee replacement can alleviate pain and restore both movement and function.

Treatment

This procedure restores function to a severely damaged knee. Most commonly, it is used to repair a knee that has been damaged by arthritis.

Total knee surgery removes the damaged and painful areas of the femur (the thigh bone) and tibia (the lower leg bone).

During the procedure, the surgeon replaces the damaged portions of the knee with artificial parts. These parts typically consist of specially-designed metal femoral and tibial components and a plastic (polyethylene) spacer. A small plastic patellar component may also be used.

Some surgeons plan and perform the surgery with the aid of robotic instruments and a computer guidance system.

Diagnostic tests that may be used for total knee surgery

  • X-rays
  • Magnetic Resonance Imaging (MRI)
  • Computed Tomography (CT) scans
Man kneeling on the beach

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