It is one of a set of trial knee prostheses that match the different anatomical structures of the knee joint, and may be used in conjunction with a knee femur trial prosthesis and a patella trial prosthesis.
The device is designed to articulate with an insert and/or the femoral prosthetic component of the knee joint and its implantation is intended to be performed with bone cement.
I have used just 4 types of knee prostheses, since 1981, changing as improvements and understanding has occurred.
Since 1991, I have used the LCS (Low Contact Stress) mobile bearing un-cemented prosthesis. I have performed over 500 procedures and my results parallel international experience with this prosthesis.
A recent manufacturing problem with the LCS femur and subsequent company response to this matter has led me to reassess my situation and I have changed to using the Advantim Total Knee Replacement. I made this decision because looking at the Australian National Joint Registry the Advantim is the best performed prosthesis on our registry.
The Advantim is a fixed bearing replacement with tibial fixation using pegs, stem fins and screws. The excellent results demonstrated with this prosthesis are as seen in the tables below.
A total knee replacement (TKR) involves the removal of the affected worn knee joint surfaces and replacing them with prosthesis. Usually, just the femur and tibia are replaced, however if you are having TKR because of rheumatoid arthritis, the patella may also be replaced.
The prostheses for the femur and tibia are made of a very high grade medical stainless steel, with a plastic (high density polyethylene) insert between them that acts as a bearing surface and prevents the metal prostheses rubbing against each other. The patella prosthesis is also plastic. The knee system I use does not require cementing of the prostheses into place, as the prostheses have a porous coating which allows bone ingrowth and hence a biological union of the prosthesis to bone.
The device is designed to articulate with an insert and the femoral prosthetic component of the knee joint and its implantation is intended to be performed with bone cement.