Transfemoral prosthesis system 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.


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 prosthesis wearers 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 prosthetic leg effectively shortens during the swing phase, reducing the risk of stumbling for the prosthesis wearer.

Axes

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.

Minature hydraulics

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.

Custom connectors

All amputation levels can be fitted thanks to individual connectors.

Flexion angle

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.

Crouching down

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 prosthesis shortens during swing-through – effectively reducing the risk of tripping.

Walking on slopes

Comfortable walking with higher safety, even on rough terrain and on slopes of up to 10°.

Reduced risk

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.

The 3R60 Pro knee joint

The 3R60 Pro is based on the same principle as the 3R60 EBS – but it has been modified in several ways.

The 3R60 Pro is smaller, more compact and lighter than the 3R60 EBS, and is suitable for users with a maximum body weight of 75kg.

Progressive stance phase damping controls flexion and extension movements under load even more effectively. Especially at high walking speeds, when the acting forces are even higher compared to a slow or moderate walking speed.

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.

Functionality

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 prosthesis. The foot adapts to different walking speeds and uneven ground without loss of comfort while simultaneously reducing the load on the sound limb.

In addition to the normal version (10 mm heel height), the Trias footshell is also available in a slim version (20 mm heel height). This allows you to select from a greater variety of shoes.

Technical information

Feature Value
MOBIS 2-3
Max. user weight 3R60 EBS - 125kg / 3R60 pro - 75kg
Weight 3R60 - 845g / 3R60-pro – 770g
Maximum flexion angle 175°

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