Packages >> Orthopaedic Surgery in India >> Total Knee
Replacement in India
Selecting the Type of Knee Replacement Implant :
Different companies manufacture different types of knee replacement
implants. Your doctor will select a particular implant for your knee
replacement. There are two basic types of implants:
- Cemented Knee Replacements :
The most commonly used knee replacements are cemented into the bone.
Cemented implants fit very nicely into position, and are immediately solidly
fixed into the bone.
- Press-Fit Knee Replacements :
Press-fit implants are designed with a rough surface that bone can grow
into. Over time the surrounding bone grows into the implant holding it
solidly in position.
What is the knee replacement implant made of?
There are four parts to most knee replacements. The components are:
- Femoral Component
Fits on the end of the thigh bone, made of metal.
- Tibial Component
Fits on top of the shin bone, usually made of metal.
- Patellar Component
Replaces the cartilage on the undersurface of the kneecap, made of plastic.
- Plastic Insert
between the femoral and tibial components. The metal used is usually
Cobalt-Chrome, and the plastic is polyethylene. There are variations to this
standard type of implant. New metals are being tested to improve the results
of the press-fit implants. Also, some surgeons use a plastic insert that
combines the tibial component and plastic insert (a so-called 'all-poly'
tibial insert). You can discuss the specific implant with your doctor.
What is a rotating knee replacement?
Rotating knee replacements have been advertised recently on TV and in
magazines. These implants are designed to more closely replicate normal knee
motion. Unfortunately, the rotating knee replacements have not been shown to
increase the longevity of the implant. Studies are currently taking place to
determine if these rotating knee replacements may be better than standard
How long does it take to perform a knee replacement?
Knee replacement surgery itself takes about 90 minutes, but time in the
operating room is longer. You are left with about an eight inch incision
over the front of the knee. The incision is most commonly closed with metal
clips called 'staples.' These clips remain in the skin for about two weeks
and are then removed in the office. Removal of the metal clips is almost