Total Knee Replacement (TKP)
Minimally-invasive quadriceps-sparing total knee replacement is a new surgical technique that allows surgeons to insert the same time-tested reliable knee replacement implants through a shorter incision using surgical approach that avoids trauma to the quadriceps muscle, which is the most important muscle group around the knee.
With minimally invasive knee replacements, the incision is 4 to 5 inches. Instead of being cut, the quadriceps is released from the underlying joint capsule on one side and then slid out of the way for the operation.
Once the knee joint exposure is made, a knee replacement is performed.
There are four basic steps to a knee replacement procedure.
• Prepare the bone. The damaged cartilage surfaces at the ends of the femur and tibia are removed along with a small amount of underlying bone.
• Position the metal implants. The removed cartilage and bone is replaced with metal components that recreate the surface of the joint. These metal parts may be cemented or "press-fit" into the bone.
• Resurface the patella. The undersurface of the patella (kneecap) is cut and resurfaced with a plastic button. Some surgeons do not resurface the patella, depending upon the case.
• Insert a spacer. A medical-grade plastic spacer is inserted between the metal components to create a smooth gliding surface.