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The knee joint, a complex structure comprising the femur (thigh bone), tibia (shin bone), and patella (knee cap), is crucial for mobility. The patella, in particular, plays a vital role in knee function, acting as a lever to enhance the power of the quadriceps muscle during knee extension. When the patella is damaged or diseased, it can cause significant pain and limit mobility. In such cases, knee cap replacement, also known as patellofemoral replacement or patellofemoral arthroplasty, may be a viable treatment option.
Understanding Knee Cap Replacement
Knee cap replacement is a surgical procedure that involves replacing the damaged surfaces of the patella and the femoral groove with artificial implants. This procedure is considered a partial knee replacement, as it only resurfaces a portion of the knee joint. It is typically recommended for individuals with knee osteoarthritis or other conditions that primarily affect the patellofemoral joint.
Candidates for Knee Cap Replacement
Individuals who may benefit from knee cap replacement include those who:
Have persistent knee pain that interferes with daily activities
Have tried non-surgical treatments, such as physical therapy, knee cap replacement medication, or injections, without success
Have damage or disease limited to the patellofemoral joint
Are healthy enough to undergo surgery
Surgical Procedure
During knee cap replacement surgery, the surgeon will make an incision in the front of the knee. The damaged cartilage and bone will be removed from the patella and the femoral groove. The artificial implants, typically made of metal and plastic, will be cemented into place, resurfacing the joint surfaces. The incision will then be closed with sutures or staples.
Recovery and Rehabilitation
Following surgery, patients can expect to stay in the hospital for a few days. Pain medication will be prescribed to manage discomfort. Physical therapy will begin soon after surgery to help restore strength, range of motion, and mobility to the knee. Most patients can return to their normal activities within a few months.
Benefits of Knee Cap Replacement
Knee cap replacement can provide several benefits, including:
Pain relief
Improved knee function
Increased mobility
Enhanced quality of life
Risks of Knee Cap Replacement
As with any surgical procedure, knee cap replacement carries some risks, such as:
Infection
Blood clots
Implant loosening or failure
Continued pain or stiffness
Knee cap replacement can be an effective treatment option for individuals with patellofemoral joint problems. It can provide significant pain relief, improve knee function, and enhance quality of life. However, it is important to discuss the risks and benefits of this procedure with an orthopedic surgeon to determine if it is the right choice for you.

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