What Parts of the Knee Are Replaced During TKR?
Total Knee Replacement (TKR) is a surgical intervention that substitutes artificial implants for the damaged and degenerated knee joint portions. It is the most common method for treating patients with knee arthritis who suffer from severe and continuous pain, swelling, stiffness, and difficulty walking. In arthritis, the knee’s cartilage cushion gets entirely worn out, resulting in the upper and lower bones of the knee joint being in direct contact. This situation hurts while standing, walking, or going upstairs. During TKR, the surgeon resects (removing the entire or part of) the joint surfaces and then mounts durable implants made from metal and medical plastic. The newly formed joint helps to regain mobility, correct the malalignment, and relieve pain to a great extent.
Dr. Yugal Karkhur 
Total Knee Replacement (TKR) is a highly effective surgical procedure performed to relieve pain and restore function in patients suffering from severe knee arthritis or joint damage. Many patients preparing for surgery often ask: What exactly is replaced during a knee replacement? Understanding the components involved can help patients feel more confident and informed about the procedure.
Understanding the Knee Joint
The knee is a complex joint formed by three main bones:
- The femur (thigh bone)
- The tibia (shin bone)
- The patella (kneecap)
These bones are covered with a smooth layer of cartilage that allows painless movement. In conditions like osteoarthritis, this cartilage wears away, causing pain, stiffness, and reduced mobility. TKR surgery focuses on replacing the damaged surfaces of these bones with artificial components.
Parts of the Knee Replaced During TKR
1. Femoral Component (Thigh Bone Surface) The lower end of the femur is reshaped and covered with a metal component. This part replaces the damaged cartilage and provides a smooth surface for joint movement.
2. Tibial Component (Shin Bone Surface) The top of the tibia is also prepared and fitted with a metal base plate. On top of this, a medical-grade plastic spacer is placed, which acts as a cushion and allows smooth movement between the bones.
3. Patellar Component (Kneecap Surface) In many cases, the underside of the patella is resurfaced with a plastic component. This helps reduce friction and improves knee function, especially during activities like climbing stairs or bending the knee.
What Is Not Replaced?
It is important to note that TKR does not replace the entire knee structure. The surgeon removes only the damaged cartilage and a small portion of bone, preserving as much of the natural joint as possible. Ligaments that provide stability may also be preserved or adjusted depending on the patient’s condition.
Benefits of Replacing These Components
Replacing the damaged parts of the knee helps:
- Reduce or eliminate chronic pain
- Improve joint alignment
- Restore mobility and flexibility
- Enhance overall quality of life
Modern implants are designed to mimic natural knee movement, allowing patients to return to daily activities with greater comfort.
Expert Knee Replacement Care
Dr. Yugal Karkhur is experienced in performing advanced knee procedures with a patient-focused approach. Recognized as the Best Orthopaedic Surgeon in Agra, he carefully evaluates each case to recommend the most suitable treatment plan. At Ykorthopaedics, patients receive advanced Total Knee Replacement Surgery in Agra, using modern techniques and high-quality implants to ensure long-lasting results and improved mobility.
Conclusion
Total Knee Replacement involves replacing the damaged surfaces of the femur, tibia, and sometimes the patella with artificial components designed to restore smooth joint movement. Understanding what is replaced during the procedure can help patients feel more prepared and confident about their treatment. With expert care and proper rehabilitation, TKR can significantly improve mobility and quality of life for individuals suffering from severe knee problems.
