Orthopedic Services and Procedures
ORTHOPEDIC PROCEDURES – KNEE
- Total Knee Replacement (Wright)
Total Knee Replacement (Wright)
A total knee replacement replaces your diseased knee joint and eliminates the damaged bearing surfaces that are causing you pain.
The surgeon will first make an incision along the front of your knee, above the patella (kneecap) to below it. Once open, the patella, which is attached by tendons, is moved so that the underside is exposed. This exposes the joint underneath as well. The knee is then bent to expose the ends of both bones. This allows the surgeon to reach the areas he or she needs during the surgery.
Removal of any diseased bone
The surgeon will first remove any diseased bone and the portions of bone necessary to accept the knee implant, using special instruments designed for this purpose.
Bones and patella are resurfaced / Implant is inserted
Once reshaped, the ends of the femur and tibia are replaced with metal and plastic. A metal or plastic “tray” is placed on top of the tibia. This piece is generally set on a stem that is inserted into the bone. It will be fixed with either a special type of bone cement or with screws.
A special kind of low-friction polyethylene insert, sized and fitted specifically for your knee, is placed on top of this tray and secured. Next, a highly polished, highly pure implant-grade metal that has also been sized for your knee is placed over the end of the prepared femur and set in place with bone cement. Finally, the underside of the patella (kneecap) is resurfaced and a small plastic piece is placed on the rear side where it will cover the new joint.
After the bones are realigned, the patella is returned to its normal location so that it covers the joint. The surgeon then closes the knee, either with stitches or staples. It is packed with surgical dressings, and small tubes may be inserted to drain any accumulated blood out of the joint.