1 Prosthetics - Orto Finland

JT20 Polycentric Knee Joint.
Easy to switch from a stable geometry to a dynamic geometry.
1 Prosthetics
1.4 Prosthetic Knee Joints
The technology behind this is two pole curves that can easily be adjusted by simply turning the extender wheel. On „S“, the knee joint
is set for high stability. On this setting, the center of rotation is still in the stable range. On the „D“ setting the JT20 allows for a more
dynamic gait. The center of rotation falls more in the dynamic range. Depending on the prosthesis wearer‘s condition, he or she can use
the polycentric JT20 for the majority of the rehabilitation process. High stability is a top priority at the start of rehab and then when
the prosthesis wearer gets more mobile, a prosthetist can quickly and easily adjust the joint for a more dynamic gait.
A mechanical spring extension assist and a pneumatic shock absorber—so called final extension stop shock absorption—are included on
the JT20. The two components work together to produce a harmonious gait pattern. With a weight limit of 150 kilograms and a design for
mobility levels 2 and 3, the knee joint can be used by a wide range of patients.
Overview of Technical Highlights:
• Pneumatic final extension stop shock absorption
• Flexion and extension set separately
• Geometrically stable joint
• Two pole curves (stable or dynamic)
All that is needed to switch
from a stable geometry to a
dynamic one is a simple twist
of the extender wheel:
„S“stands for high stance-phase
stability
„D“ is for a more dynamic gait.
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1.10 Socket Accessories 1.9 Valves
1.8 Stump Socks 1.7 Cosmetic Covers
1.5 Hip Joints
1.3 Functional Adapters 1.2 Modular Adapters 1.1 Prosthetic Feet
1.4 Prosthetic Knee
Joints
1.6 Liners and
Locking Devices