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Prosthetics

Ottobock Microprocessor Knees: Trust, Move, Live.

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Why Choose a Microprocessor Knee?

What’s the difference between a microprocessor knee and a mechanical knee prosthesis? How do MPKs work exactly? And what sets Ottobock solutions apart? Here’s a quick overview to answer your most pressing MPK questions.

What’s the difference between a microprocessor knee and a mechanical knee prosthesis? How do MPKs work exactly? And what sets Ottobock solutions apart? Here’s a quick overview to answer your most pressing MPK questions.

The Ottobock Difference.

Ottobock launched the first fully microprocessor-controlled knee in 1997 and remains the world’s leading manufacturer of MPKs to this day. Over the last 25 years, we have continually updated our systems based on both scientific research and feedback from users about what they really need.


For example, your prosthetist will program your microprocessor knee to match your walking pattern. Many systems won’t vary from this programmed pattern until they’re checked again. But Ottobock MPKs continually monitor the phases of your gait, adjusting in real time to support you as you speed up or slow down.

Michael walks down a grassy hill in his Kenevo Microprocessor Knee with his prosthetist’s guidance.
Michael walks down a grassy hill in his Kenevo Microprocessor Knee with his prosthetist’s guidance.

Stance, Swing, and Everything in Between.

All prosthetic knees are designed to emulate two phases of your natural walking pattern or “gait cycle”:


During stance phase, your foot is on the ground. Your leg is slightly bent, acting as a shock absorber while providing enough resistance to support your weight.


During swing phase, your foot is in the air and swinging forward. Your knee flexes more so that your foot can clear the floor as it swings forward into the next step.


But it’s the way they recreate these phases of gait that separates one type of prosthetic knee from another.

Rebecca walks down a slope with her C-Leg Microprocessor Knee in the Stance Phase.
Rebecca walks down a slope with her C-Leg Microprocessor Knee in the Stance Phase.

Mechanical vs. Microprocessor.

Mechanical knees are usually controlled by a mechanical lock, friction, or pneumatic or hydraulic fluids. Often only body weight is used to activate the stance control mechanism, leading to a less natural walking pattern.


Microprocessor knees use sensors, software, and a built-in computer to adjust fluid-based resistance to your unique gait. This makes it easier to walk at varying speeds and safely descend ramps and stairs.


The bottom line? MPKs empower you to walk with a more stable, natural, and efficient gait.

A C-Leg 4 user plugs his microprocessor knee in to charge.
A C-Leg 4 user plugs his microprocessor knee in to charge.

The Ottobock Difference.

Ottobock launched the first fully microprocessor-controlled knee in 1997 and remains the world’s leading manufacturer of MPKs to this day. Over the last 25 years, we have continually updated our systems based on both scientific research and feedback from users about what they really need.


For example, your prosthetist will program your microprocessor knee to match your walking pattern. Many systems won’t vary from this programmed pattern until they’re checked again. But Ottobock MPKs continually monitor the phases of your gait, adjusting in real time to support you as you speed up or slow down.

Michael walks down a grassy hill in his Kenevo Microprocessor Knee with his prosthetist’s guidance.
Michael walks down a grassy hill in his Kenevo Microprocessor Knee with his prosthetist’s guidance.

Stance, Swing, and Everything in Between.

All prosthetic knees are designed to emulate two phases of your natural walking pattern or “gait cycle”:


During stance phase, your foot is on the ground. Your leg is slightly bent, acting as a shock absorber while providing enough resistance to support your weight.


During swing phase, your foot is in the air and swinging forward. Your knee flexes more so that your foot can clear the floor as it swings forward into the next step.


But it’s the way they recreate these phases of gait that separates one type of prosthetic knee from another.

Rebecca walks down a slope with her C-Leg Microprocessor Knee in the Stance Phase.
Rebecca walks down a slope with her C-Leg Microprocessor Knee in the Stance Phase.
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Products.

The Ottobock Portfolio of Microprocessor-Controlled Knees.

Kenevo: Build More Confidence.

For activity levels 1, 2, and Low 3

Looking to feel safe, secure, and supported with every step? Whether you need more stability for day-to-day activities or are striving to reclaim your independence during rehab and recovery, Kenevo is ideal for those with moderate or changing mobility needs.

The C-Leg 4 Microprocessor-Controlled Knee from Ottobock

C-Leg: Choose Proven Performance.

For activity levels 2 – 4

Live your healthy, active life on the world’s most trusted and preferred microprocessor knee.¹ Our signature MPK, C-Leg dynamically adapts to a wide variety of situations — and the C-Leg 4 update delivers next-level personalization and user experience.

The C-Leg 4 Microprocessor-Controlled Knee from Ottobock

Genium X4: Experience Life in Effortless Motion.

For activity levels 2 – 4

Get ready to free your mind and unlock your true potential with the Genium X4: a
next-gen Ottobock microprocessor knee that sets a new standard of
performance, durability, and customizability.

Genium X4. The newest mechatronical knee joint from Ottobock.
Benefits at a glance.

Key Features of Ottobock MPKs.

C-Leg user Georg walks his dog next to a field of wildflowers.

Gait Optimization.

Enjoy a smooth walking pattern regardless of terrain, walking speed, footwear or carried weight. Our MPKs enable harmonious, fluid movement via: adaptive yielding control, which enables the right amount of flexion resistance; adaptive swing phase control to ensure the ideal flexion angle; and other innovative features.

Kenevo user Robert and his wife are playing boccia in their garden

Stumble Recovery.

Ottobock Microprocessor Knees sense when you trip or stumble and boost resistance so you can catch yourself before you fall. The result? Significantly lower risk of stumbling, falling and fear of falling.² Whether you’re walking fast or slow, taking big steps or small ones, or traversing stairs or slopes, you can trust your Ottobock MPK.

An Ottobock MPK user stands while chatting on the phone.

Safe, Intuitive Standing.

Whether you’re standing relaxed or ready to take your next step, Intuitive Stance adapts to your needs. Even on inclines or uneven surfaces, it allows you to stand and then move safely without thinking twice. Plus, you can distribute weight evenly between both legs, so you’re less prone to harmful compensating movements.

Zainab walks through waves along a beach with her Genium X3.

Durability in the Elements.

An Ingress Protecion (IP) rating refers to a device‘s ability to withstand dust, water, and other substances. Our IP 68-rated, water-resistant C-Leg can easily handle freshwater sprinkles and rain showers. And our water- and corrosion-resistant IP 68 rated Genium X4 can be fully submerged in fresh, salt, or chlorinated water.

An Ottobock MPK user switches MyModes from the Cockpit app while working out.

MyModes.

Get the support you need for activities that fit your lifestyle with MyModes. These additional settings are programmed by your prosthetist to suit everything from your favorite sports to recurring work tasks. Plus, you can easily switch between them via the Cockpit app (iOS or Android) or specific movement patterns.

Bilateral Ottobock Genium user Aaron enjoying a BBQ with his friend by the lake.

Benefits for Bilateral Users.

Ottobock MPKs can help bilateral users lead largely independent, self-determined lives. Intelligent sensor technology, Intuitive Stance, Stumble Recovery, and other advancements provide targeted support for everyday activities as well as advanced detection and assistance for critical situations.

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User testimonials.

Microprocessor Knees to Fit Any Lifestyle.

Chance walks worry-free.

Chance cherishes family time with his dog, not worrying about terrain or weather. His C-Leg ensures stability on uneven surfaces and stairs, handles rain and splashes of water, letting him focus on what matters most: family and fun outdoors.

Robert feels confident with his Kenevo.

Robert enjoys the simple but important things in his life. Being able to plan his day, make breakfast or enjoy the afternoon in the garden. His Kenevo gives him support with adjusting to new situations and mastering everyday challenges.

Günter experiences stability in every step with the Kenevo.

Günter has loved classic cars since his young age. After the amputation, he knew he didn’t want to give it up. With his Kenevo, he feels stable and secure, which enables him to enjoy his everyday life and follow his passion for cars.

Georg is more active than ever with his C-Leg 4.

After suffering with a long-term condition, Georg’s amputation has actually created new possibilities for him. He has realized his childhood dream of skiing, discovered a passion for the javelin, and even became a para-athlete. The C-Leg 4 supports him as he plays sports, stays active in his father’s fitness studio, and goes about his daily routines.

Rebecca puts a personal touch on her C-Leg 4.

Fashion student Rebecca loves to express creativity in every facet of her life. With the C-Leg 4, she was able to customize her shield insert, and now her unique style and personality shine through with each step she takes.


“I’m still the same person,” says Rebecca, “just with a special accessory.”

Kenevo kept Michael moving through his rehabilitation.

Michael used the Kenevo to make the most of his therapy. “Gaining confidence was the hardest thing,” he said.

Although it took some time for him to trust the knee joint, he worked with his physiotherapist and learned to navigate stairs, uneven surfaces, and more.

Now, Michael wears a Genium X3, works as a logistics specialist, and regularly plays sports with his wife and friends.

Detlef found his new normal with the Kenevo.

Detlef considers himself a homebody – but he also loves taking regular walks and watching his grandson play football. Because of his age, he was concerned that he might have trouble recovering after his amputation. But the Kenevo showed him that he can put his full confidence in a microprocessor knee joint. Now, Detlef feels safe and secure with every step.

Detlef works with his therapist to practice using the Kenevo Microprocessor Knee.
Detlef works with his therapist to practice using the Kenevo Microprocessor Knee.

Björn shares his adventures.

For Björn life happens outdoors. He talks about his experiences with Genium X4, hiking without worrying about battery life or challenging terrains, even in unpredictable weather. "I feel less exhausted when walking, especially uphill." For Björn, it's not just about mobility — it's about maintaining his freedom.

Siglind loves her seamless routine.

As a dedicated horse groomer, Siglind’s job requires physical strength and reliability. From navigating tight spaces and walking countless steps to reacting quickly and maneuvering heavy carts, Siglind's Genium X4 handles it all. Each step offers seamless movement, allowing her to focus on her tasks with confidence.

Laura can focus on her work.

Laura thrives in her bustling office environment with the Genium X4, effortlessly navigating crowded spaces and constant movement. Features like the start-to-walk function and intuitive cycling make her daily routine smoother than ever.

Marcus masters every terrain with confidence.

As a marine, Marcus knows the importance of trusting your partner, and he puts his full trust in his knee with every step he takes. With the Genium X4 he feels safer even on challenging terrain like slippery mud. Whether he's playing basketball with his kids or tackling his daily tasks with confidence, the Genium X4 is there for him.

Dave rediscovers life‘s joys.

Dave has a clear focus: relishing in life's precious moments without distraction. Seamlessly navigating everyday tasks and enjoying spontaneous moments with his family, Dave values the natural feel of his Genium X4 knees.

Caleb is unstoppable.

Caleb is a dynamic individual balancing athletics, fatherhood, and more. With his Genium X4, he enjoys effortless movement across all terrains. Fully waterproof and corrosion-resistant, it keeps up with his outdoor adventures while personalized MyModes ensure he's always ready on the go.

Shima is spreading joy with every step.

Shima, an O&P clinician, exudes positivity and cares deeply for her patients. Her active lifestyle includes wheelchair basketball, running, and dancing. Her C-Leg enhances her mobility seamlessly, supporting her vibrant life.

Chance walks worry-free.

Chance cherishes family time with his dog, not worrying about terrain or weather. His C-Leg ensures stability on uneven surfaces and stairs, handles rain and splashes of water, letting him focus on what matters most: family and fun outdoors.

Robert feels confident with his Kenevo.

Robert enjoys the simple but important things in his life. Being able to plan his day, make breakfast or enjoy the afternoon in the garden. His Kenevo gives him support with adjusting to new situations and mastering everyday challenges.

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Proven MPK Technology.

Clinical Study Support.

Clinical Research Drives Everything We Do.

Every Ottobock microprocessor knee is supported by the highest levels of clinical data. Our MPKs are extensively tested on different types of terrain, slopes, stairs, ramps, and hills. They’re tested for safety, mobility levels, efficiency, ease of use, preference, satisfaction, and more. With dozens of top-quality studies at the heart of your mobility, you can truly trust your MPK to meet your unique needs as you move through life.

Someone typing on their laptop
FAQs.

Answers to Common MPK Questions.

Activity Levels.

Your activity level (or “mobility grade”) is a number between 1 and 4 that indicates your overall physical condition and potential for benefiting from various prosthesis options. Your prosthetist will assess your activity level and use it to set therapy goals and determine which solution is most likely to maximize your mobility and quality of life.

Activity Level 4.

Description: Users are generally able to walk outdoors with little or no restriction, for any amount of time or distance. Due to high functional demands, significant shock, tension, and distortion can occur.


Therapy Goal: Restore the ability to stand, walk, and move both indoors and outdoors without any limitations.


Ottobock MPK Options: C-Leg, Genium X4

Zainab is shopping with her friend using her Genium X3
Zainab is shopping with her friend using her Genium X3

Activity Level 1.

Description: Those with Level 1 mobility typically use their prosthesis only for transfers or moving slowly on level floors. Walking time and distance are likely very limited due to overall physical condition.


Therapy Goal: Restore the ability to stand and walk indoors for short periods.


Ottobock MPK Options: Kenevo

Kenevo user Robert is standing in the kitchen preparing coffee
Kenevo user Robert is standing in the kitchen preparing coffee

Activity Level 2.

Description: Users can typically walk slowly with their prosthesis and negotiate low obstacles, such as curbs, single steps, and uneven surfaces. Walking time and distance are still limited.


Therapy Goal: Restore the ability to stand and walk both indoors and outdoors.


Ottobock MPK Options: Kenevo, C-Leg, Genium X4

Kenevo user Günter is walking down the stairs in front of his house
Kenevo user Günter is walking down the stairs in front of his house

Activity Level 3.

Description: Users can walk with their prosthesis at medium-to-high speeds, vary their speed, and overcome most natural obstacles. They can typically engage in professional, therapeutic, and other activities that don’t put too much strain on their prosthesis. And while there may be an increased need for safety (perhaps due to additional disability or special living conditions) combined with medium-to-high mobility demands, walking time and distance are only slightly restricted.


Therapy Goal: Restore the ability to stand and walk, both indoors and outdoors, with only mild restrictions.


Ottobock MPK Options: C-Leg, Genium X4

Genium user Axel stands in the park with his dog
Genium user Axel stands in the park with his dog

Activity Level 4.

Description: Users are generally able to walk outdoors with little or no restriction, for any amount of time or distance. Due to high functional demands, significant shock, tension, and distortion can occur.


Therapy Goal: Restore the ability to stand, walk, and move both indoors and outdoors without any limitations.


Ottobock MPK Options: C-Leg, Genium X4

Zainab is shopping with her friend using her Genium X3
Zainab is shopping with her friend using her Genium X3

Activity Level 1.

Description: Those with Level 1 mobility typically use their prosthesis only for transfers or moving slowly on level floors. Walking time and distance are likely very limited due to overall physical condition.


Therapy Goal: Restore the ability to stand and walk indoors for short periods.


Ottobock MPK Options: Kenevo

Kenevo user Robert is standing in the kitchen preparing coffee
Kenevo user Robert is standing in the kitchen preparing coffee
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Ready to Get Started?

Everyone has different mobility goals and lifestyle preferences. With the Ottobock portfolio of microprocessor knees, you’re sure to find a prosthesis you can trust at every step — one that will keep you moving and help you live your life the way you want.

Schedule a fitting with a certified prosthetist today to discover the solution that best fits your individual needs.

Zainab is standing, looking ready for the next challenge.

1. Wismer, N., Mileusnic, M., Sreckovic, I., & Hahn, A. (2016). First results on next generation C-Leg. Poster presentation at OTWorld, Leipzig, Germany.
2. Mileusnic M, Hahn A, Reiter S. Effects of a novel microprocessor-controlled knee, Kenevo, on the safety, mobility, and satisfaction of lower-activity patients with transfemoral amputation. J Prosthet Orthot 2017;29(4):198-205.