AFO vs KAFO: What's the Difference & Which Leg Brace Do You Need?
- 2 days ago
- 8 min read
If you or someone you care for has been told they need a leg brace — or if you've been searching for a KAFO brace in Delhi or a knee ankle foot orthosis near you — one of the first questions you'll face is: What is the difference between an AFO and a KAFO?
The confusion is completely understandable. Both are lower limb orthoses. Both help people walk better. But they serve very different conditions, cover different parts of the leg, and choosing the wrong one can delay recovery or even cause harm.
At The Rehab Street, Delhi and Gurgaon's specialist foot, ankle, and lower limb orthotic clinic, we see this confusion every single week. This guide will help you understand exactly what each device does — so that when you speak with our orthotists, you already have the foundation to make an informed decision.
What Is an AFO (Ankle Foot Orthosis)?
An AFO — short for Ankle Foot Orthosis — is a brace that covers the foot and ankle, typically extending to just below the knee. It is designed to support and control the ankle joint and foot position during walking.
What Does an AFO Do?
An AFO works by holding the foot at the correct angle — preventing it from dropping (foot drop), turning inward, or rolling excessively. It does not support the knee at all.
Think of an AFO as a brace for the lower half of the lower leg — from the ankle down.
Who Needs an AFO?
An AFO is typically prescribed for people who have:
Foot drop — where the front of the foot cannot be lifted during walking, causing the toes to drag on the ground
Ankle instability — where the ankle rolls inward (overpronation) or outward
Spastic foot — common after stroke or cerebral palsy, where the foot turns inward due to muscle tightness
Achilles tendon weakness — where the calf muscle cannot push off properly during walking
Mild polio affecting only the ankle and foot — where knee stability is preserved
If your knee is stable — meaning it does not buckle, give way, or hyperextend — and only your ankle or foot is the problem, an AFO is likely the appropriate device.
Types of AFO
Rigid AFO — full plastic shell, maximum control, used for severe foot drop or spasticity
Hinged AFO — allows some ankle movement; more natural gait, used for moderate conditions
Carbon Fiber AFO — lightweight, stores and releases energy for more efficient walking; ideal for active users
Posterior Leaf Spring AFO — thin, flexible plastic; used for mild foot drop with good calf strength
What Is a KAFO (Knee Ankle Foot Orthosis)?
A KAFO — short for Knee Ankle Foot Orthosis — is a full-leg brace that extends from the thigh all the way down to the foot. It controls the knee, ankle, and foot simultaneously.
In India, a KAFO is also commonly called a polio caliper, leg caliper, or polio leg brace — especially the traditional metal-and-leather version that many older polio survivors have been wearing for decades.
What Does a KAFO Do?
A KAFO provides structural support to the entire lower limb when the muscles of the thigh, knee, calf, or ankle are too weak to do their job. It:
Prevents the knee from buckling (collapsing inward) during standing and walking
Prevents genu recurvatum (the knee hyperextending backward)
Supports the ankle and controls foot position — just like an AFO, but as part of a larger system
Enables safe weight-bearing when the quadriceps (thigh muscles) are weak or absent
Who Needs a KAFO?
A KAFO is prescribed when the knee itself is unstable — not just the foot and ankle. This typically includes:
Polio and post-polio syndrome — the most common reason for KAFO prescription in India; polio often destroys the quadriceps, making the knee completely unstable
Spinal cord injury (partial or complete) — where leg muscle control is lost or severely reduced
Muscular dystrophy — progressive muscle weakness affecting the thigh and lower leg
Cerebral palsy (moderate to severe) — where knee control is compromised
Stroke with severe hemiplegia — where the entire leg on one side is too weak to support the body
Quadriceps paralysis or severe weakness — from any cause
The key clinical sign: if your knee buckles, gives way, or requires you to press your hand on your thigh or knee to walk — you need a KAFO, not just an AFO.
Types of KAFO
Modern KAFOs are very different from the heavy metal calipers of the past. Today's options include:
Traditional metal/leather KAFO (polio caliper) — durable and repairable, but heavy
Plastic (thermoplastic) KAFO — lighter, custom-moulded to the leg; good for moderate activity
Carbon fiber KAFO — the most advanced option; extremely lightweight KAFO brace that stores and releases energy for a more natural walking pattern; ideal for active users
Stance Control KAFO (SCKAFO) — automatically locks the knee during standing (stance phase) and unlocks during the swing phase; allows a much more natural, energy-efficient gait
Electronic KAFO (E-KAFO) — uses sensors and microprocessors to control knee locking and unlocking in real time; the most technologically advanced option, though at a higher price point
AFO vs KAFO: The Key Differences at a Glance
Feature | AFO | KAFO |
Covers | Foot + Ankle | Thigh + Knee + Ankle + Foot |
Main purpose | Control ankle/foot position | Stabilise knee + ankle + foot |
Used for | Foot drop, ankle instability | Knee buckling, quadriceps weakness, polio |
Knee support | None | Full knee support |
Weight | Lighter | Heavier (though carbon fiber options are much lighter) |
Indian common name | Ankle brace / foot brace | Polio caliper / leg caliper |
Typical conditions | Stroke (mild), foot drop, mild polio | Polio, post-polio syndrome, SCI, MD |
What Is an HKAFO?
Some patients need even more support than a KAFO can provide — extending up to the hip joint. This device is called an HKAFO (Hip Knee Ankle Foot Orthosis).
An HKAFO brace is prescribed when hip muscle weakness is present in addition to knee and ankle weakness. This is less common but may be needed in:
High spinal cord injuries
Bilateral (both legs) polio with hip involvement
Paraplegia rehabilitation for standing and limited walking
At The Rehab Street, our orthotists assess each patient comprehensively to determine whether an AFO, KAFO, or HKAFO is the appropriate prescription — and which specific type within that category best suits the patient's activity level, body weight, condition, and goals.
Why Getting This Choice Right Matters
Choosing the wrong orthosis is not just ineffective — it can be harmful.
An AFO given to someone who actually needs a KAFO will not support the knee. The knee will continue to buckle, increasing the risk of falls and progressively damaging the hip, spine, and shoulder (especially if the person is using a hand-on-knee gait to compensate).
A KAFO given without proper fitting and gait training can restrict movement unnecessarily and cause skin breakdown, poor posture, or compensatory problems in the other leg.
This is why custom fitting by a qualified orthotist — not off-the-shelf buying — is so important, particularly for KAFOs.
Custom KAFO vs Off-the-Shelf: Why Custom Wins
Off-the-shelf KAFOs are available online and in surgical stores across Delhi and Gurgaon. They are cheaper upfront, but they come with serious limitations:
They are not moulded to your limb — pressure points, discomfort, and skin breakdown are common
The knee joint alignment may be wrong — causing the brace to work against your natural movement
They don't account for individual muscle patterns, deformity, or gait
They wear out faster under real-world use
A custom KAFO — fabricated by a certified orthotist after gait analysis, pressure assessment, and precise measurements — fits your body exactly. It functions as a clinical device, not just a support product.
At The Rehab Street, every KAFO we prescribe and fabricate is fully custom. We use gait analysis and pressure scanning to understand how you walk before we build anything — because the best KAFO is the one designed specifically around how your body moves.
KAFO Orthosis Price in India — What to Expect
One of the most common questions we receive is about KAFO orthosis price in India. The honest answer is that cost varies considerably depending on the material, technology, and the degree of customisation:
Traditional metal/leather KAFO (polio caliper): ₹8,000 – ₹15,000
Plastic (thermoplastic) custom KAFO: ₹12,000 – ₹25,000
Carbon fiber KAFO India: ₹35,000 – ₹65,000
Stance Control KAFO (SCKAFO): ₹45,000 – ₹90,000
Electronic KAFO leg brace India: ₹65,000 and above
These are approximate ranges. The final cost depends on the specific components used, the complexity of the case, and whether bilateral (both legs) devices are needed.
At The Rehab Street, we provide a detailed cost breakdown at your consultation — so there are no surprises. We believe that the right orthosis is an investment in your mobility and independence.
Getting a KAFO or AFO in Delhi & Gurgaon
If you are looking for a KAFO brace in Delhi, a custom KAFO orthotist in Delhi, or a knee ankle foot orthosis near you in Gurgaon, The Rehab Street offers specialist orthotic assessment and fabrication at both our clinics:
📍 New Delhi: H-13, Ground Floor, H Block Market, Greater Kailash II, New Delhi – 110048 📍 Gurgaon: B-003, Ground Floor, Nirvana Courtyard Market, Sector 50, Gurgaon – 122018
📞 Call or WhatsApp: +91-9354919385
Our process begins with a clinical assessment and gait analysis — we observe how you walk, identify the specific points of instability or weakness, and only then recommend whether you need an AFO, KAFO, HKAFO, or another device altogether. We will never recommend a device you do not need.
Frequently Asked Questions
Q: Can I upgrade from an AFO to a KAFO later? Yes. If your condition progresses or your knee becomes less stable over time — which is common in post-polio syndrome — upgrading from an AFO to a KAFO is straightforward. We reassess and fabricate a new device accordingly.
Q: Is a carbon fiber KAFO better than a plastic one? For most active users, yes. Carbon fiber KAFO India options are significantly lighter, more durable, and provide energy return during walking — making each step less tiring. However, for less mobile patients or those with severe deformity, a plastic KAFO may actually provide better control.
Q: What is the difference between a KAFO and a polio caliper? They are the same device. "Polio caliper" is the common Indian term for a KAFO. Modern KAFOs are made from plastic or carbon fiber and are far lighter and more functional than the traditional metal-leather calipers many people are familiar with.
Q: How long does it take to get a custom KAFO made? At The Rehab Street, the typical timeline from initial assessment to final fitting is 7–14 days, depending on the complexity of the device and the materials selected.
Q: Can children get a KAFO? Yes. KAFOs are prescribed for children with polio, cerebral palsy, muscular dystrophy, and other conditions. Paediatric KAFOs are smaller and account for growth — they may need to be replaced periodically as the child grows.
The difference between an AFO and a KAFO comes down to one key question: Is your knee stable?
If your knee is stable and only your ankle or foot is the problem → AFO
If your knee buckles, gives way, or cannot support your weight → KAFO
If your hip is also weak or unstable → HKAFO
The right device, fitted correctly by a qualified orthotist, can genuinely transform your ability to walk — safely, independently, and with far less fatigue.
If you are searching for a KAFO brace for walking in Delhi or Gurgaon, or if you are unsure whether you need an AFO or KAFO, we invite you to book a consultation at The Rehab Street. Our assessment is comprehensive, our advice is honest, and our devices are built around your body and your goals.
The Rehab Street is a specialist podiatry and orthotics clinic with locations in Greater Kailash II, New Delhi and Sector 50, Gurgaon. We provide custom insoles, AFOs, KAFOs, HKAFOs, and a full range of lower limb orthotic services.
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