Bauerfeind AG

JT20: The prosthesis knee joint from Bauerfeind

Polycentrics brings higher stability or more dynamics
Bauerfeind, one of the leading manufacturers of medical aids, presents the JT20, an in-house development in the prosthesis knee joint sector. A polycentric system is the focus of the innovation. The individually adjustable centrode allows the JT20 knee joint to be adapted either for more stability or more dynamics. This complex system allows optimal provision for thigh and knee amputees. It has been specially designed for mobility classes 2 and 3, and can carry up to 150 kilograms of body weight.

The JT20 polycentric knee joint from Bauerfeind enables adjustment between safe and dynamic geometries for the first time ever. The basis for the system is provided by two centrodes which can be simply adjusted by turning the excenter. In the S setting, the knee joint guarantees a high safety level. The instantaneous rotation point is in the safe sector in this case. In the D setting, the JT20 achieves a larger dynamics range. In this case, the instantaneous rotation point is more towards the dynamic range.

A mechanical spring forwarder and a pneumatic shock absorber - the so-called pre-shock damping - are integrated in the JT20. The interaction of both components allows a harmonic walking pattern. Depending on the constitutional condition, the prosthesis carrier can cope with a large proportion of the rehabilitation process using the polycentric JT20.

A high level of safety is in the foreground during the beginning of the rehabilitation process, but the patient can adjust the joint simply and quickly to provide a larger dynamics range when he has become more mobile.
The knee joint can be flexibly used with its weight limit of 150 kilograms and its design for mobility classes 2 and 3.

Bauerfeind is planning further in-house product designs for the future. The company is extending its expertise in this sector with the development of innovative adapters for the lower extremities.