Above Knee prosthesis with 3R60 EBS knee joint
The 3R60 EBS is a multiaxial, hydraulically controlled knee joint. Based on the natural model, it supports controlled knee flexion under load while walking.
This means the user walks using minimum variation with the natural walking pattern and uses less energy while walking.
Two miniature hydraulic units control flexion resistance in the knee joint
The 3R60 is a polycentric knee joint. An intelligent miniature hydraulic system controls the pendulum movement of the lower prosthetic limb during the swing phase. This means that flexion and extension of the knee joint are dampened by corresponding movement resistance provided by the miniature hydraulics. The dampening characteristics of the hydraulics were precisely adapted to the needs of artificial limb users with a moderate activity level.
In the stance phase, when the prosthesis bears the body weight while walking, what is known as the EBS unit of the 3R60 controls the flexion movement beginning at heel strike and the subsequent extension movement. This harmoniously dampened movement pattern in the stance phase is based on the natural model. The benefits include a more physiological gait pattern and a shock absorption effect when stepping down with the prosthesis, reducing the forces acting on the residual limb, pelvis and spine.
Safety in the stance phase is also improved by preventing the unintentional, sudden buckling of the knee joint. This limited stance phase flexion allows the user to also walk down slopes up to approx. 10° step-over-step.
Thanks to the multiaxial joint design of the 3R60 EBS, the artificial limb effectively shortens during the swing phase, reducing the risk of stumbling for the user.
All amputation levels can be fitted thanks to individual connectors.
The polycentric joint has five axes that are arranged to form a ring. This sophisticated design allows for two different modes of operation:
Swing phase mode and stance phase flexion mode. Two especially configured miniature hydraulic units control the two modes.
The 3R60 has a total of five axes. For the user, this design improves protection against unwanted buckling in the stance phase. In the swing phase, the joint reduces the length of the prosthesis by more than 25 mm depending on the flexion angle. This gives the prosthesis wearer much more ground clearance in the swing phase. The risk of tripping is reduced as a result.
Extremely high flexion angle of 175° for more freedom of movement.
Benefits at a glance
Able to walk easily again
Controlled stance phase flexion up to 15° relieves strain on both limbs. The reduction of forces acting on the residual limb, pelvis and spine makes it possible to approximate a sound, physiological gait pattern.
Low weight and a very large flexion angle of 175° for greater freedom of movement – especially handy when you have to get into a car, or sit in a confined space in an airplane or train.
Reduced risk of tripping
Thanks to the multi-axial joint design, the artificial limb shortens during swing-through – effectively reducing the risk of tripping.
Walking on slopes
Comfortable walking with high safety, even on rough terrain and on slopes of up to 10°.
Reduced risk of stumbling
The design offers greater protection in high-risk situations: the wearer can always flex the joint in a controlled manner without delay, so there is less risk of falling than with locking knee joints.
Various walking speeds
Straightforward control of the swing phase and the virtually natural pendulum movement of the lower leg lead to a harmonious, natural gait pattern, even at different walking speeds.
Ideal component combination
Nature as the model
The Trias prosthetic foot made of carbon fibre has proven itself as a sturdy, high-quality everyday foot for users with moderate activity levels. Its triangular, curved shape reflects the anatomy of the human foot – making it a distinctive example of how nature’s solutions can be transferred to orthopaedic technology. The heel and forefoot elements replicate the arch structure of the human foot. The base spring connects them with each other in order to guarantee that the Trias works as a single unit.
The impact at heel strike is gently dampened, followed by a physiological rollover. The energy stored in the system at heel strike is released again at toe-off. Safe, controlled, energy-saving movement patterns boost the user's confidence in the artificial limb. The foot adapts to different walking speeds and uneven ground without loss of comfort while simultaneously reducing the load on the sound limb.
|Max. user weight||3R60 EBS - 125kg / 3R60 pro - 75kg|
|Weight||3R60 - 845g / 3R60-pro – 770g|
|Maximum flexion angle||175°|
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Overview of the positive interplay between the 3R60 and the Trias
The 3R60 is very versatile in application. Fittings for nearly all amputation levels from knee disarticulation, above knee, hip disarticulation and hemipelvectomy are possible.
The 3R60 gives you great freedom of movement. It is possible to walk on slight inclines and uneven surfaces; thanks to the extremely large flexion angle, you can bend your leg very far and the risk of tripping and falling is reduced with the 3R60. You walk more naturally with the prosthetic knee joint; the swing phase, which you can initiate with little force, is harmonious.
No, the 3R60 is not suitable for users who are physically able to go down stairs step-over-step. However, limited stance phase flexion under load makes it possible to walk down slight inclines up to 10° step-over-step.