Knee replacement surgery—also known as knee arthroplasty—can help relieve pain and restore function to severely damaged knee joints. This procedure involves removing damaged bone and cartilage from your femur (thigh bone), tibia (shin bone), and patella (kneecap) and replacing it with an artificial joint (prosthesis) made of metal, plastics, and high-quality polymers.
An orthopedic surgeon will assess your knee's range of motion, stability, and strength to determine if knee replacement is right for you. X-rays help determine the extent of the damage.
Your doctor can choose from a variety of artificial knee replacements and surgical techniques, taking into account your age, weight, activity level, knee size and shape, and overall health.
Some of the most important reasons for joint replacement include:
[2] Osteoarthritis: This is a type of arthritis associated with aging, affecting most people over fifty years of age, and in rare cases, younger people. Osteoarthritis occurs due to inflammation and the gradual loss of cartilage in the joint. This cartilage loss leads to increased friction between the knee bones, thus increasing pain, and knee replacement surgery is the ideal solution.
2. Rheumatoid arthritis: This is a chronic inflammatory disease that destroys cartilage and causes severe pain and stiffness in the knee joint. Post-traumatic arthritis: This type of arthritis results from a severe injury to the knee joint, such as a broken bone or torn ligament. This, in turn, affects the knee cartilage.
Total knee replacement
Partial knee replacement
Knee head replacement
Complex knee replacement
During surgery, the damaged cartilage and the ends of the bones in the knee joint are removed. An artificial joint is then implanted in their place.
The artificial joint consists of different parts that individually replace the ends of the various bones, thus restoring the healthy structure of the joint and its proper function.
The artificial joint is made of metal and a special polyethylene material used as a friction surface.
Many artificial joints are available from different manufacturers, all with a similar overall appearance and slight variations in shape or materials.
The artificial joint is fitted according to the length of the patient's bones, and the surgeon selects the appropriate components during the procedure.
Who are the best candidates for joint replacement surgery?
Patients suffering from joint pain (hip or knee) due to primary or secondary cartilage damage, whose condition has not improved with conservative treatment, and whose orthopedic surgeon has recommended surgical intervention.
Type of Surgery:
– Because there are different types of knee replacement surgery, your doctor will choose a specific type based on the severity of your knee injury.
– If your knee injury is severe, your doctor may perform a total knee replacement for a better quality of life.
– Also, total knee replacement surgery has higher success rates compared to other knee surgery solutions.
Knee replacement surgery is performed under general or local anesthesia (spinal/epidural). You should consult your surgeon about which medications to stop taking in the days leading up to the surgery, and you must fast completely for 8 hours beforehand.
Your knee will be bent to fully expose the joint surfaces. After making an incision approximately 6 to 10 inches (15 to 25 centimeters) long, the surgeon will reposition the kneecap and remove the damaged joint surfaces.
After preparing the joint surfaces, the surgeon will fit the artificial joint components. Before closing the incision, the surgeon will flex and rotate the knee, testing it to ensure it is functioning correctly. The surgery lasts approximately two hours.