Why does my knee hurt?
It's pretty simple. Three bones meet up at the knee joint:the end of the thighbone (femur), the top of the shinbone (tibia) and the kneecap (patella). Those bones are cushioned bycartilage, but when the cartilage is worn away – which is actually the definition of osteoarthritis – the bones grind against each other . That grinding hurts. You can fell it climbing stairs, working in the garden, or just bending your knees to sit.
What happens during knee replacement surgery?
It's the same idea as having most things fixed – worn parts are taken out, and new parts are installed in their place. In surgery, the damaged portions of the knee bones are removed, and the nee is resurfaced with metal and plastic implants. Here knee replacment patients have a smaller incision, shorter hospital stay, and quicker recovery.
What Happens Afterward?
Rehab begins quickly on the day after your surgery, you'll get a visit from your physical therapist and begin learning how to use your new knee. You may be fitted with a "continuous passive motion" machine that will gently straighten and bend your knee. Other exercise that promote blood flow to your legs include ankle pumps and pedaling your feet.