The NEURO FLEX MAX system knee joint is a locked joint, which provides motion control. The patient can unlock it via a lock lever or a pulling cable. It is preassembled in a physiological joint angle of 5° and locked gradually in 10° steps up to a maximum of 55°. By exchanging the extension stop and the step lock stop disc (0°–60°) an extension of 0° and a gradual locking up to a maximum of 60° can be achieved.

The NEURO FLEX MAX system knee joint with step lock function is locked gradually during extension without the patient having to intervene. The gradual locking is achieved via the toothings of the step lock stop disc and the step lock pawl. It is also possible to lock the system joint in different flexion angles. This requires the use of interchangeable extension stops and the assembly of the corresponding step lock stop disc for a 0°, 10°, 20° or 30° extension stop.

The system joint has a permanent unlock function and can be used as a free moving, monocentric joint with integrated posterior offset. For this purpose, the lock lever is secured with a locating pin. The patient themself can enable or disable this function.

Alternative Function: Furthermore, accessory parts can be used to limit the maximum knee flexion angle (50°–90°) in steps of 10°. For this purpose, it is necessary to mount a locking pawl as well as a flexion stop disc and cover plate specific to the alternative function and, if necessary, to file the flexion stop disc at the second stop. Other flexion angles can be obtained by exchanging the extension stop and filing the flexion stop disc at the first stop.

The NEURO FLEX MAX system knee joint with step lock function can also be converted into a NEURO FLEX MAX system knee joint with lock function. To do so, the step lock pawl and step lock stop disc must be replaced by a locking pawl and a flexion stop disc.


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