The relevance of the prosthetic foot
Find out more about the relevance, selection, and construction of prosthetic feet.
Find out more about the relevance, selection, and construction of prosthetic feet.
It’s more than a prosthetic foot. It’s a foundation.
The prosthetic foot makes everything else possible. Whether you‘re an above or below knee amputee, the quality and performance of your whole prosthesis will be affected by the quality and performance of the prosthetic foot.
With a wide range of Ottobock prosthetic feet, you can be sure that together with your O&P professional, you will find the perfect prosthetic foot fitting to your personal needs. Whether it is a foot made out of carbon or a microprocessor-controlled foot, our whole portfolio is based on the same idea: building a foundation. We take our responsibility seriously. When choosing a prosthetic foot from Ottobock, you can be sure that each one is designed with passion, in compliance with highest quality standards and always with your needs in mind.
How to select the right prosthetic foot
Please note: Choosing a prosthetic foot that best suits your personal requirements, needs, and goals is a complex task. Your O&P professional is an expert in this field. With their education, experience and biomechanical knowledge, they will choose the prosthetic foot that helps achieve the best possible fitting outcome for you specifically. The information provided in this section only serve as a guidance. Please contact your O&P professional if you have more detailed questions.
Personal factors
Apart from all the technical selection criteria, your O&P professional will keep your personal needs in mind, living situation, and goals when choosing the foot prosthesis. These factors could be the desire to participate in sports activities or the ability to paint your toenails. These are of great importance because your prosthetic foot should be like an extension of yourself.
Personal factors
Apart from all the technical selection criteria, your O&P professional will keep your personal needs in mind, living situation, and goals when choosing the foot prosthesis. These factors could be the desire to participate in sports activities or the ability to paint your toenails. These are of great importance because your prosthetic foot should be like an extension of yourself.
Amputation level
Your amputation level will be one of the first things that needs to be looked at when choosing the components in your prosthesis. An above knee amputation requires a prosthetic knee joint, which will help to define the appropriate prosthetic foot. This is where your O&P professional will assess the functions of the prosthetic knee joint and recommend an appropriate prosthetic foot. Because the natural knee joint is intact after a below knee amputation, your O&P professional will consider factors like length of the residual limb, strength, and range of motion when recommending an appropriate foot prosthesis.
Activity level
Manufacturers categorize prosthetic feet by the user’s activity level – also called mobility grade. This means that not every prosthetic foot can be used by every user. Selecting a prosthesis that matches your activity level will maximize your mobility and your quality of life. Here are some very basic indications for identifying your activity level. If you are on the border between two activity levels, your O&P professional will consider multiple products to assess the one that is best for you.
Build height
Prosthetic feet vary in height. We call the height of a prosthetic foot build height. Your height and the length of your residual limb as a below knee amputee will determine the appropriate build height and the space you have for a prosthetic foot. As an above knee amputee, the length of the prosthetic knee joint will be an additional factor to consider for the build height of the prosthetic foot.
Body weight
Prosthetic feet are designed for a specific weight range. To ensure that a prosthetic foot performs well for you, your O&P professional will choose one suited to your weight class.
Foot size
Like human feet, prosthetic feet differ in length and size. Prosthetic feet are sized by centimeters rather than standard shoe sizes. Every foot is available in a specific range of sizes. There are prosthetic feet that come in sizes for children, while others are sized for large adults. Ottobock running blades and specialty sports feet often have a a single size.
Activity levels
The amputee has the ability or the potential to use the prosthesis for transfers or for the purpose of moving slowly on level floors. The amount of time and the distance the amputee can walk are seriously limited due to their condition.
Therapy goal: Restoring the ability to stand and to walk indoors to a limited degree.
The amputee has the ability or the potential to walk slowly with the prosthesis and to negotiate low environmental obstacles like curbs, single steps, or uneven surfaces. The amount of time and the distance the amputee can walk are seriously limited due to their condition.
Therapy goal: Restoring the ability to stand and walk both indoors and outdoors.
The amputee has the ability or the potential to walk with the prosthesis at a medium to high speed as well as at different speeds and simultaneously overcome most natural obstacles. They are also capable of walking outdoors and engaging in professional, therapeutic, and other activities that do not subject the prosthesis to above-average mechanical strain. There may be an increased need for safety due to secondary circumstances (additional disability, special living conditions) combined with medium to high mobility demands. The amount of time and the distance the patient can walk are only mildly restricted compared to individuals without disabilities.
Therapy goal: Restoring the ability to stand and to walk indoors and outdoors with only mild restrictions.
The amputee's ability or potential to walk with a prosthesis is similar to that of the unrestricted outdoor walker. The amount of time and walking distance are not limited. Moreover, due to the high functional demands, a high degree of shock, tension, and distortion can occur.
Therapy goal: Restoring the ability to stand, walk, and move about both indoors and outdoors without any limitations.
Specific information about prosthetic feet
Comfort
A foot prosthesis has to feel good for you to meet your activity goals.
Materials
The materials in a prosthetic foot differ by activity level. Wood, plastic, and foam are usually found in feet designed for individuals who have low activity levels and require stability. Lightweight carbon fiber feet meet the functional needs of active individuals since they are built for shock absorption and energy efficiency.
Comfort
A foot prosthesis has to feel good for you to meet your activity goals.
Function
Prosthetic feet are designed to mimic a human foot at a specific activity level. For lower activity individuals, a prosthetic foot is designed to provide stability and balance. For those who are most active, a prosthetic foot must mimic the natural foot during the act of walking. It must act as a shock absorber as you strike your heel to the ground, adapt to uneven terrain, provide a smooth rollover from heel to toe, and provide a rigid lever for propelling forward when you finish your step (“toe-off”).
Multi-axial motion
Some prosthetic feet are designed to mimic the ankle which allows the foot to move in multiple planes. Multi-axial capability in a foot allows the foot to absorb varying terrain by moving in all directions. These motions are forward to back, side to side, and rotation around the ankle. Multi-axial motion is needed to walk comfortably and confidently on uneven ground where your foot must adapt to whatever it encounters.
The basics
Designing prosthetic foot systems is challenging. It’s very difficult to reproduce the complex workings of the human foot and ankle. Ideally the foot will be light because its weight is added to the rest of the prosthetic leg. If the foot is too heavy and the suspension of the prosthesis is not appropriate, the connection to the socket and your limb will be affected and also the overall function of the prosthesis.
A good prosthetic foot should also be strong, as it will be taking on large forces and torque as you walk and run. Feet must also be small enough to fit within a footshell, a cosmetic covering for the prosthetic foot, and thus fit within a shoe. Being light, strong, and small, while functional and durable is the challenge.
Early designs for prosthetic feet were often a solid piece of wood. A similar design, the SACH foot (solid-ankle-cushioned-heel) is still in use because of its sturdy function. It is especially useful for individuals with lower activity levels. A SACH foot typically has a rigid inner structure (wood or plastic) surrounded by a compressible foam cosmetic shell.
The cosmetic shell
Today’s more sophisticated feet add more functions and are secured inside a cosmetic shell. Most people never see their prosthetic foot without this exterior shell. The cosmetic shell stretches around the prosthetic foot and serves two purposes:
It makes your prosthetic foot look like an anatomical foot
It snugly fits in your shoe
Materials
The materials in a prosthetic foot differ by activity level. Wood, plastic, and foam are usually found in feet designed for individuals who have low activity levels and require stability. Lightweight carbon fiber feet meet the functional needs of active individuals since they are built for shock absorption and energy efficiency.
Comfort
A foot prosthesis has to feel good for you to meet your activity goals.
Prosthetic feet from Ottobock
Each user is different and each user has different individual habits, preferences, and goals. To meet individual requirements, there is no one prosthetic foot for everyone but there are various foot prostheses for different user profiles. Our prosthetic feet cater to your individual needs.
Less active individuals
The Terion is designed for less active individuals who mainly navigate indoor environments and will utilize a walking aid for outdoor ambulation and place a high value on dependable support from their prosthetic foot.
Less active individuals
The Terion is designed for less active individuals who mainly navigate indoor environments and will utilize a walking aid for outdoor ambulation and place a high value on dependable support from their prosthetic foot.
Moderately active individuals
The Trias prosthetic feet are designed for moderately active individuals who navigate indoor and familiar outdoor environments and place a high value on consistent stability when walking.
Active individuals
The Taleo prosthetic feet are designed for active individuals who navigate varied indoor and outdoor environments and place a high value on effortless walking and the ability to go wherever life takes them.
Highly active individuals
The Triton prosthetic foot is designed for highly active individuals who navigate varied indoor and outdoor environments and place a high value on uncompromised response and control even when performing high impact activities.
Recreational athletes
The Challenger prosthetic foot is designed for everyone who participates in recreational sports while performing agile and powerful movements.
Athletes
The Ottobock Runner prosthetic feet are designed for everyone who wants to use the same running blade that even elite athletes use.
This is what you can rely on
Heritage
For generations, Ottobock feet have helped define what’s possible with a lower limb prosthesis. With every step, our feet carry on the traditions of craftsmanship, invention, and passion – that continue to set our products apart.
Trust
If you and your O&P professional decide for an Ottobock prosthetic foot, you can trust that you have chosen a foot that has been meticulously designed, rigorously evaluated, and preferred by amputees around the world.
Heritage
For generations, Ottobock feet have helped define what’s possible with a lower limb prosthesis. With every step, our feet carry on the traditions of craftsmanship, invention, and passion – that continue to set our products apart.
Quality
Every detail within a prosthetic foot can make a difference for your daily life. That’s why when designing a foot, we treat every detail like it’s the most important one. Built to the same exceptional standard, our feet start and end with your needs.
Trust
If you and your O&P professional decide for an Ottobock prosthetic foot, you can trust that you have chosen a foot that has been meticulously designed, rigorously evaluated, and preferred by amputees around the world.
Heritage
For generations, Ottobock feet have helped define what’s possible with a lower limb prosthesis. With every step, our feet carry on the traditions of craftsmanship, invention, and passion – that continue to set our products apart.
Frequently asked questions
The prosthetic fitting is done at an O&P clinic or an orthopedic workshop. You will receive competent and comprehensive care there. You can find Ottobock products at O&P clinics, health centers, and specialist rehabilitation stores.
With your O&P Professional, you will choose the prosthetic foot that best fits your individual habits, preferences, and needs – based on your amputation level, mobility grade, your lifestyle, and further criteria. The better informed you are, the better you can tell your O&P professional what you really need and the more actively you can participate during your fitting process. You can be certain that your technician will always choose what’s best for you.
Yes, you can test different foot prostheses. Many O&P clinics and orthopedic workshops offer trial fittings for a specified period. Speak with your O&P professional for more information.
Reimbursement depends on your individual personal situation, country of residence, and insurance company. The price of prosthetic feet generally rises with activity level because additional functionality translates to more expensive materials and designs. Insurance companies will often cover a more expensive prosthesis if it will enable you to increase your activity level, work a longer day, or take fewer days off. Your O&P professional will support you during the reimbursement process.
Some prosthetic feet are waterproof. Others are not. Some are resistant to fresh, salt, and chlorinated water, while others are only be resistant to fresh water. It depends on the prosthetic foot. If it is important for you to have a prosthetic foot that is waterproof, please talk to your O&P professional to find the best solution for you.
Generally, no. Our prosthetic feet are delivered with a footshell that is based on the shape of a natural foot so that it is possible to wear most common types of shoes. Many foot sizes come in both a slim and normal variant to match your natural foot as closely as possible. Some feet and footshells have a split between the big toe and second toe that makes it possible to wear sandals. The Meridium prosthetic foot even features automatic heel height adjustment.
Most of our prosthetic feet provide you with support for a wide range of everyday activities. Some are also perfectly suitable for occasional light sports activities such as badminton or frisbee. However, if you want to engage in regular and demanding physical activities or sports that involve running or jumping, an Ottobock sports foot might be more appropriate.
If you engage in sports regularly and would like to use your prosthetic foot to walk longer distances, run, or sprint, we recommend a prosthetic sports foot. The Runner or Sprinter running blades have proven to be effective for sprinting as a recreational or competitive activity. If you prefer more relaxed jogging, the Challenger would be a good choice.
With some prosthetic feet, it's possible to walk around barefoot for short periods indoors. Your O&P professional will give you useful advice.
Prosthetic feet are tested to two million gait cycles per ISO standards. Depending on your activity level and how much you use your prosthesis, we recommend replacing the prosthetic foot every two to three years.
Still have questions?
If you have any questions about prosthetic feet, please feel free to contact us.
Still have questions?
If you have any questions about prosthetic feet, please feel free to contact us.
Still have questions?
If you have any questions about prosthetic feet, please feel free to contact us.
Still have questions?
If you have any questions about prosthetic feet, please feel free to contact us.