Advantages of 3 parts Ankle Prosthesis

Let us together dig the answers on why 3 parts ankle implant is better compared to previous 2 parts implant. After this discussion session, you may proceed to knowing what's best for the unexpected future.

First of all I would like to say about how this type of implant design will help in providing normal ankle joint movements to the receiver. Let the picture below help us in understanding this:



By reffering on the above picture, these 3 parts components will produce 2 sliding surfaces (also known as articulating surface). Bottom surface will allow inversion and flexion while above surface will support rotation. It is clearly seen that these 2 sliding surfaces will share the movements and in total give the ankle complex movements back to its owner. 2 parts implant with only 1 sliding surface makes it hard to suport all 3 ankle movements. This is advantage number one.

When it comes to stress distribution, 3 parts ankle implant will perform better. Back to the 2 sliding surfaces that I mentioned before, stress created by loading from patient's weight and movements will be distributed between the surfaces. Simply said that 2 surfaces will provide less stress concentration at each surfaces compared to the 1 surface ankle implant. Low stress concentration will leads to lower wear rate and longer life span. We want this implant to last as long as possible to avoid any complication to the receiver later in the future.

There maybe many more advantages but let us stop here for now as these 2 answers is ample enough to open our eyes to this desgin type. Feel free to do some extra reading about this matter if you are interested and stay tuned with me for more informations. :)