This new development is the only multi-axis ankle joint prosthesis in the world that has been specially developed for high impact resistance and can be used in water sports or for high impact loads, such as in equestrian sports. The joint drive force of the joint prosthesis component is provided by a spring torsion force, whereby the spring is enclosed in a titanium sleeve.
The bearings to be used in the prosthesis had to fulfil stringent requirements. The company was looking for bearings with a very low coefficient of friction. In addition, they must have low moisture absorption, be corrosion-free when used in or near salt water and enable the simplest possible assembly without the need for fastening elements. In addition, they must fulfil the QMS requirements in accordance with ISO 9001 and exceed the test conditions for dynamic and static load in accordance with ISO 10328.
In addition to the plain bearings, a ball and socket joint was required that can swivel radially during movement and can be offset by 20 degrees. This also had to be corrosion-free, maintain a low coefficient of friction, enable simple assembly and be CE-marked.