OH5

The OH5 knee joint is characterised by the polycentric construction. The profile of the joint is suited to moderately active to highly active users with above-knee prostheses who require a high degree of safety.

Depending on the point in time at which the prosthesis is provided, the joint can be set initially for relatively inactive patients and then adjusted in line with the progress made in mobility during rehabilitation.

The joint also protects the prosthesis during small steps, such as those taken when turning around on the side of the prosthesis, when walking up and down stairs and on uneven ground. By using the supplied extension assist spring the joint can also provide for high demands such as quick walking/running.

The stance phase stability of the joint is determined by the closing geometry. Control of the swing phase is actively supported by the integrated hydraulic mechanism (adjustable in A-B-C steps). Flexion and extension can be adjusted individually to meet the needs of the user, and can also be aided by the extension assist spring.

The construction enables the prosthesis to be assembled without shortening in order to minimise long-term sequela such as intervertebral disk problems, knee problems in the existing leg and in the existing skeletal structures. The configuration of the geometry also enables the user to stand safely and comfortably. Similarly, stretching of the cosmesis when sitting is reduced.

Technical information

   offset possible up to 5 mm AP/ML
   5-axle construction permits assembly without shortening
   closing geometry permits very easy release at the dorsal stopper and locking, even when taking small steps, for high stance phase stability
   active support of the swing phase by mounting the included extension assist spring
   adjustable A-B-C hydraulics for flexion and extension to suit the needs of the user
   cosmetically appealing solution