Prosthetics vs Orthotics: Which Device Replaces a Limb and Which Supports One

The two appointments are in the same corridor, but the conversations could not be more different. In one room, a man who lost his lower leg to vascular disease is learning how a silicone liner rolls onto his residual limb. Two doors down, a woman recovering from a stroke is having plaster wrapped around an ankle that is still hers, just not yet obeying her. Same profession, same materials on the bench, opposite purposes.

People who search for prosthesis vs orthosis are usually standing at one of those two doors, or helping someone who is. The words sound alike, the clinics are often shared, and the paperwork rarely explains the distinction. Yet the difference decides everything that follows: how the device is designed, what the first weeks feel like, and which risks your care team will be watching for.

This explainer walks through both devices without the jargon, using the evidence rather than the brochure.

Prosthesis vs orthosis: the one-sentence difference

A prosthesis is a device that replaces a body part that is missing. An orthosis is a device that supports, aligns or corrects a body part that is still present. That single distinction, absent versus present, is the whole answer. Everything else is detail.

The words come from Greek. Prosthesis roughly means “an addition”; orthosis comes from orthos, meaning “straight” or “correct”. The plurals are prostheses and orthoses, though most people say prosthetics and orthotics, which strictly speaking are the professions rather than the objects. Nobody in clinic will mind which you use.

The clinicians differ too. A prosthetist designs and fits prostheses. An orthotist designs and fits orthoses. Many practitioners train and certify in both and are called prosthetist-orthotists, which is one reason the two services sit side by side in most rehabilitation departments. Both work alongside physiotherapists, occupational therapists, rehabilitation physicians and, where amputation is involved, the surgical team.

The scale of need is large. The World Health Organization estimates that more than 2.5 billion people worldwide need one or more assistive products, a category that includes prostheses, orthoses, wheelchairs and hearing aids, and that access falls far short of demand in many countries (WHO). In the United States, a widely cited analysis in the Archives of Physical Medicine and Rehabilitation estimated that about 1.6 million people were living with limb loss in 2005, with vascular disease, most of it linked to diabetes, accounting for more than half of cases (NIH/PubMed).

So when someone asks which device they need, the honest first question back is not about technology at all. It is: is the limb there, and what can it still do? A surgeon, a rehabilitation physician and a prosthetist-orthotist answer that together, and the sections below explain how each device works once that answer is known.

How a prosthesis actually works

A prosthesis has to do two jobs at once: hold on to the body securely, and stand in for the function of the missing part. Most of the engineering effort goes into the first job, because a limb that slips is a limb nobody trusts.

The interface is the socket, a custom-shaped shell that surrounds the residual limb. The residual limb is the remaining portion of the arm or leg after amputation. Between skin and socket usually sits a liner, a soft sleeve of silicone or gel that cushions bone and spreads pressure. Suspension is the method that keeps the whole thing attached: a pin that locks into the socket, a suction seal, a vacuum system, or straps and sleeves. Below the socket, a pylon (a rigid tube) or a shaped forearm carries load to the terminal device, the foot, knee unit, hand or hook that meets the world.

Function comes from that terminal device and from the person’s own remaining joints and muscles. A below-knee prosthesis relies on the user’s intact knee and hip to swing and stabilize. An above-knee prosthesis adds a mechanical or microprocessor-controlled knee that must be kept from buckling on every step, which is why walking with one demands more energy and more practice (NHS). Upper-limb prostheses may be purely cosmetic, body-powered through a cable and harness that the shoulder moves, or myoelectric, meaning small electrical signals from remaining forearm muscles open and close the hand.

Fit is never finished. The residual limb changes shape as swelling settles and muscle adapts, so sockets are adjusted, padded and eventually recast. Compression garments in the early months help shape the limb for that reason (NHS). Understanding this ongoing relationship between body and socket is the single most useful thing a new user can learn.

What is an orthosis and how does it work?

An orthosis works by applying controlled forces to a body part that already exists. The principle most orthotists reach for is three-point pressure: two forces on one side of a joint and one opposing force on the other, arranged so the joint is held, guided or gently corrected. Picture a splinted finger, and you have the idea in miniature.

From that simple principle come four broad purposes. An orthosis can immobilize, holding a joint still so a fracture, ligament or tendon can heal. It can support, taking load off a weak or painful structure, as a knee brace does for an unstable ligament. It can align or correct, as a scoliosis brace does by resisting the curve of a growing spine (Johns Hopkins). And it can assist movement, as an ankle-foot orthosis does when it holds up a foot that drops after stroke or nerve injury so the toes clear the floor.

Materials range from soft neoprene and elastic to carbon-fiber shells and hinged metal uprights. Some orthoses are off-the-shelf; many are custom-molded from a plaster or digital scan so that pressure lands on tolerant areas, such as the shaft of the shin, and stays away from bony prominences, such as the ankle bones and the head of the fibula, where skin breaks down quickly.

Because the limb is still there, an orthosis also has a job a prosthesis never has: it must respect living tissue that can feel, sweat, swell and, in people with diabetes or nerve damage, fail to warn its owner of a pressure sore. That is why orthotic care includes teaching people how to inspect their skin, and why numbness is treated as a risk rather than a convenience. An orthosis that fits well is almost forgettable; one that does not announces itself within an hour.

Who is usually fitted with a prosthesis, and who is asked to wait

A prosthesis is considered for anyone missing part of a limb, whether from amputation for vascular disease, diabetes, trauma, cancer or infection, or from a congenital limb difference, meaning a limb that did not fully form before birth. Being a candidate and being ready are different things, and the rehabilitation team makes that distinction carefully.

Readiness usually turns on three questions. First, has the residual limb healed? The surgical wound must close and swelling must settle before a socket can be shaped, a process the NHS describes as taking several weeks and sometimes longer when circulation is poor (NHS). Second, can the person manage the physical demand? Walking with a prosthesis uses more energy than walking on two intact legs, and more again above the knee, so heart and lung health, balance and strength are assessed. Third, are the remaining joints mobile? A hip or knee that has stiffened into a bent position, called a contracture, can make a prosthesis unusable until it is stretched out, which is why early physiotherapy focuses so hard on lying flat and straightening the knee.

People asked to wait tend to fall into predictable groups: those with an unhealed or infected wound, those whose swelling is still changing daily, those with a contracture that needs treatment first, and those whose other medical conditions, such as unstable heart disease or severe dementia, make safe walking unlikely for now. Waiting is not refusal. Many are refitted later, and others use a wheelchair as their primary mobility with a prosthesis for specific tasks.

Not everyone chooses a prosthesis, and some upper-limb users decide that one hand and a well-adapted environment serve them better than a device they must put on, take off and maintain. That is a legitimate outcome, not a failure, and the treating team should present it as one.

Who is usually prescribed an orthosis

Orthoses reach a far wider population than prostheses, because the list of things that can go wrong with an existing limb or spine is long. A few groups account for most prescriptions.

People recovering from stroke or living with neurological conditions often need an ankle-foot orthosis for foot drop, or a wrist-hand orthosis to prevent the fingers from curling into a fixed position. Children with cerebral palsy may wear orthoses to guide growth and improve walking pattern. Adolescents with scoliosis, a sideways curve of the spine, may be prescribed a brace during the growth years, when bracing is thought to slow progression of moderate curves (Johns Hopkins). People with diabetes and reduced sensation in the feet are often fitted with protective insoles and footwear to spread pressure and reduce ulcer risk, an intervention that sits squarely in the prevention of amputation rather than its aftermath.

Orthopedic and sports injuries form another large group: fracture braces that allow controlled movement, knee orthoses for ligament instability, and spinal orthoses after certain fractures or surgeries. Arthritis, tendon disorders and heel pain bring people in for insoles and supports.

Who is asked to wait, or steered elsewhere? Someone whose swelling is still acute may be splinted temporarily and measured for a definitive device later. Someone with an open wound under the intended contact area needs the wound managed first. And someone whose weakness is severe enough that no brace can substitute for it may be better served by a walking aid or wheelchair, at least for now. An orthosis is a tool with a specific job; when it cannot do that job, prescribing it anyway only adds weight and cost of effort.

In every case the prescriber, usually a physician or surgeon, defines the goal, and the orthotist designs to it. Patients do well to ask what that goal is in plain words.

Prosthesis vs orthosis: the differences side by side

Seeing the two devices in one frame makes the distinction stick. The table below summarizes what generally differs; individual cases vary, and your team’s plan takes priority.

Feature	Prosthesis	Orthosis
Purpose	Replaces a missing body part	Supports, aligns, protects or corrects an existing part
Typical reasons	Amputation, congenital limb difference	Stroke, nerve injury, scoliosis, fracture, arthritis, diabetes foot protection
Clinician	Prosthetist	Orthotist
Key interface	Socket around the residual limb	Shell, straps or insole against skin over the limb or trunk
Main early challenge	Volume change of the residual limb; socket fit	Pressure points; skin tolerance; wearing schedule
Energy cost of walking	Higher than intact limbs, especially above the knee (NHS)	Usually lowers effort by improving mechanics
Timeline	Often lifelong, with sockets replaced as the limb changes	Temporary for healing injuries; long-term for chronic conditions
Phantom sensation	Common (Mayo Clinic)	Not applicable

Two rows deserve a second look. Energy cost explains why prosthetic rehabilitation leans so heavily on cardiovascular fitness and why some people with above-knee amputation choose a wheelchair for long distances even after mastering their limb. The timeline row explains why an orthosis can feel like a season and a prosthesis like a relationship: fracture braces come off, but a residual limb keeps changing for years.

The overlap is real, though. Both are custom-fitted, both depend on daily skin checks, both need periodic adjustment, and both work best when paired with therapy rather than handed over at a counter. The professions share training, and many patients, as the next sections show, use both devices at different points in the same illness.

Types of prosthetic devices, from below-knee legs to myoelectric hands

Prostheses are grouped first by where the limb ends. Each level brings its own mechanics.

Lower limb accounts for most prostheses. A partial-foot prosthesis fills a shoe and restores a lever for push-off. A transtibial, or below-knee, prosthesis keeps the person’s own knee, which is the single biggest advantage in learning to walk. A transfemoral, or above-knee, prosthesis replaces the knee as well as the foot; the knee unit may be a simple hinge, a hydraulic joint that resists buckling, or a microprocessor knee that adjusts resistance many times a second. Hip and pelvic-level prostheses exist but are used by far fewer people.

Upper limb divides similarly into partial-hand, transradial (below-elbow) and transhumeral (above-elbow) levels. Control options run from passive cosmetic hands, through body-powered systems driven by a harness across the shoulders, to myoelectric hands that read muscle signals through electrodes in the socket. Each has trade-offs: body-powered devices are light, durable and give a sense of force through the cable; myoelectric hands offer more grip patterns but weigh more and need charging.

Prosthetic feet range from a fixed keel for stability to energy-storing carbon blades for active users. Sockets may be rigid or flexible-walled. Suspension, as covered earlier, varies from pin locks to vacuum systems.

Two things are worth stating plainly. First, “advanced” does not automatically mean “better” for a given person; a heavy high-tech knee can be the wrong choice for someone with limited strength, and rehabilitation teams match the device to the user’s goals and capacity rather than to a catalogue. Second, a surgical approach called osseointegration, in which an implant anchored in the bone protrudes through the skin to attach the prosthesis directly, is offered in selected centers for people who cannot tolerate a socket; it carries infection risk and is a specialist decision, not a routine option.

Types of orthotic devices: braces, splints and insoles explained

Orthoses are named by the joints they cross, which produces a run of acronyms that sound technical but are simply anatomy in shorthand.

An AFO is an ankle-foot orthosis, the workhorse of neurological rehabilitation. It may be a rigid shell that holds the ankle still, a hinged design that allows the ankle to bend upward while blocking downward drop, or a slim carbon strut that stores and returns energy. A KAFO, knee-ankle-foot orthosis, extends up the thigh to lock or control the knee when thigh muscles cannot. A HKAFO adds a hip joint. On the arm, a WHO in orthotic shorthand is a wrist-hand orthosis, distinct from the World Health Organization, and it is used after tendon injuries, for arthritis, and to prevent contracture after stroke.

Spinal orthoses include soft lumbar supports, rigid thoracolumbosacral braces used after some fractures and surgeries, and the underarm braces prescribed for adolescent scoliosis, which are typically worn for a prescribed number of hours daily during the remaining growth period, with the schedule set by the spine team (Johns Hopkins). Cervical collars, from soft foam to rigid designs, are orthoses too.

Foot orthoses, better known as insoles, are the most common orthotic device of all. Prefabricated inserts suit many people with heel or arch pain. Custom-molded insoles and protective footwear matter most for people with diabetes and reduced sensation, where the goal is to spread pressure across the sole and prevent the ulcers that can lead to infection and amputation.

Fracture braces, hinged knee braces and post-operative shoulder immobilizers round out the list. Some of these are dispensed in emergency departments and sports clinics rather than orthotic workshops, but the design principles are identical: control the forces, protect the skin, and remove the device when its job is done.

What the first days and weeks usually look like after fitting

For a new prosthesis user, the first weeks are less about the limb and more about the skin and the routine. Most rehabilitation programs begin with short wearing periods, sometimes as little as an hour or two, and inspect the residual limb each time the socket comes off. Redness that fades within a short while is expected; redness that persists, blistering or broken skin means the socket needs adjusting before the next session, not after.

Walking starts between parallel bars, progresses to a frame or crutches, and only then to open floor. Therapists coach weight shift, step length and how to stand up without leaning on the sound leg alone. Energy demand is real, and fatigue after a session is normal; the NHS notes that many people find prosthetic walking tiring at first and that fitness work is part of the program (NHS). Residual limb volume fluctuates through the day, so users learn to add or remove thin socks over the liner to keep the fit snug. A shrinking limb over the first months is expected, and the first socket is often a temporary one for exactly this reason.

For a new orthosis, the pattern is similar but faster. A wearing-in schedule builds tolerance over days rather than weeks. Skin is checked at every removal, especially over the ankle bones, the top of the shin and the heel. Footwear may need a larger size or a deeper toe box to accommodate an AFO. People often report that walking feels stiff or strange in the first week and then, quite suddenly, unremarkable.

Follow-up appointments in both cases are frequent early and taper as fit stabilizes. Missing them is the most common reason a good device becomes a bad one, because small problems in fit compound quietly.

Living with the device: skin, fit checks and adjustments over the months

Once the novelty fades, long-term success comes down to three habits: looking, cleaning and reporting.

Looking means a daily skin inspection, with a mirror for areas that are hard to see. For prosthesis users the residual limb is checked morning and night; for orthosis users the pressure zones under straps and shell edges get the same attention. Early warning signs are the same for both: redness that outlasts a short rest, a hot patch, a blister, a callus building where the device rubs, or a patch of numbness that was not there before. People with diabetes or nerve damage may feel nothing at all, so for them the mirror is not optional.

Cleaning means washing the skin daily with mild soap, drying thoroughly, and cleaning liners, socks and the inside of an orthosis as the clinician advised. Sweat and bacteria in a warm enclosed space are a predictable recipe for folliculitis and fungal rashes. Lotions and powders are used only if the team recommends them, because some interfere with suction suspension.

Reporting means telling the clinic when something changes rather than adapting around it. Weight gain or loss, a new medication that causes fluid retention, pregnancy, or simply the passage of time will alter fit. A prosthetic socket that once sealed may start to piston, meaning it slides up and down with each step, and a brace that once sat flush may start to gap. Both are fixable early and harmful late.

Phantom sensation and phantom pain deserve mention here because they surprise people. Feeling that the missing limb is still present is very common after amputation, and painful phantom sensations affect many people too; they often ease over time but can persist, and the treating team has several approaches to manage them (Mayo Clinic). A well-fitting prosthesis is one of those approaches; a poorly fitting one can make them worse.

Can you need both a prosthesis and an orthosis?

Yes, and the diabetic foot is the clearest example of why. A person with diabetes and reduced sensation may first be fitted with protective insoles and footwear, an orthosis, to prevent ulcers. If an ulcer becomes infected and a toe or part of the forefoot is removed, a partial-foot prosthesis fills the shoe and restores push-off. That same person often continues to wear a protective insole and sometimes an AFO on the other foot, because the second foot carries the same risk. One patient, both devices, one underlying disease.

Stroke offers another. Someone who loses the use of one arm and one leg may wear an AFO on the affected leg. If, years later, peripheral arterial disease leads to an amputation on that side, they will need a prosthesis on a limb that also has weakness and spasticity from the stroke, which complicates socket design and control. The prosthetist and physiotherapist plan around both problems, not one.

Trauma cases mix them constantly. A crash that costs someone a leg often injures the other leg too; a knee brace on the intact side and a prosthesis on the other is a common pairing in early rehabilitation. Children with congenital limb differences may use a prosthesis on one limb and an orthosis to correct alignment on the other as they grow.

The practical lesson is that the question in the title, replace or support, is answered limb by limb and sometimes joint by joint, not person by person. Clinics that offer both services under one roof exist precisely because so many people need both. When you attend, it helps to bring the whole picture: every device you use, every skin problem on any limb, and every change in the underlying condition, since a decision about one leg is often really a decision about two.

What people often get wrong about prosthetics and orthotics

Some misunderstandings show up in almost every first appointment. Correcting them early saves frustration.

“A prosthesis is like a new leg.” It is a tool that stands in for a leg, and it asks the rest of the body to work harder. Walking with a below-knee prosthesis costs more energy than walking on two intact legs, and above-knee more again (NHS). Realistic expectations are what let people build up gradually instead of giving up.

“The device will be ready straight after surgery.” The residual limb must heal and its swelling must settle before a socket can be shaped, which usually takes several weeks (NHS). Early rehabilitation happens without the limb, and it is not wasted time.

“An orthosis makes muscles lazy.” A brace worn as prescribed does not weaken a limb; disuse does. Orthoses are prescribed alongside exercise, not instead of it, and many are designed to assist rather than replace movement.

“Insoles from a shop are the same as custom orthoses.” For general comfort, prefabricated insoles suit many people. For a foot that has lost sensation, a custom device that offloads specific pressure points is a different intervention with a different purpose.

“If it hurts, I should push through.” Persistent pain or redness under either device means the fit is wrong, not that the wearer is weak. Skin breakdown under a prosthesis can stop walking for weeks; under an orthosis in a numb foot it can lead to ulceration.

“Phantom pain means something went wrong.” Sensation from a missing limb is common and is understood as the brain’s map of the body adjusting, not a sign of surgical error (Mayo Clinic).

“The most advanced device is the best one.” The best device is the one a person can use safely every day for the goals that matter to them.

Orthotist vs prosthetist: questions to ask your care team

Appointments move quickly, and the most useful questions are easy to forget under fluorescent light. These are the ones clinicians wish patients asked more often.

• What is the goal of this device in plain words: healing, protection, walking further, using both hands, preventing a curve from getting worse?
• Is this a temporary device that will be replaced, or a definitive one? If temporary, what will tell us it is time to change it?
• How many hours a day should I wear it at first, and how quickly should that build up?
• What should the skin look like when I take it off, and what should make me stop wearing it and call you?
• Which parts of my body will be working harder because of this device, and what exercises protect them?
• How will my weight, swelling, other medicines or my underlying condition change the fit, and how often should I come back?
• Are there alternatives, including a walking aid, wheelchair, surgery or no device, and what would each mean for my daily life?
• Who do I contact between appointments, and how quickly can a fit problem be seen?
• How do I clean and store it, and what should I never do to it?
• If I am a parent: how will growth affect the device, and how often will it be remade?

Two questions sit above the rest. The first is about goals, because a prosthetist choosing a foot or an orthotist choosing a hinge is really choosing what you will be able to do, and they can only choose well if they know what you want to do. The second is about what to do when something goes wrong, because both devices are safe only when problems are reported early.

Write the answers down. Bring the device, your usual shoes and any other supports you use to every review. And if a decision feels rushed, it is reasonable to ask for time; the treating team makes the recommendation, but the device lives with you.

When to call your doctor: red-flag signs with a prosthesis or orthosis

Most problems with either device are minor and fixable, but a few signs mean the device should come off and the team should hear from you the same day, or that you should seek urgent care.

Contact your care team promptly if you notice skin that stays red or feels hot after the device has been off for a while, a blister, a graze, a callus that is thickening quickly, or any break in the skin under a socket, strap or shell. Do the same for new or worsening pain that does not settle with the device removed, swelling of the residual limb or braced limb that changes the fit within days, a socket that suddenly feels loose or tight, or a brace that begins to gap or rub where it did not before. New numbness, tingling or a change in skin color under an orthosis suggests pressure on a nerve or blood vessel and should not be waited out.

Seek urgent medical care if a wound under either device is spreading, weeping, foul-smelling or surrounded by streaking redness; if you develop fever, chills or feel generally unwell alongside a skin problem; if a limb becomes pale, cold, blue or acutely painful; or if you fall and cannot bear weight, hit your head or lose consciousness. People with diabetes or reduced sensation should treat any foot wound, however small, as urgent, because infection can advance without pain.

Call as well for practical reasons: any structural failure of the device, a strap, hinge, knee unit or suspension that no longer works, since improvising a repair can cause injury. Do not stop wearing an orthosis prescribed for healing or spinal protection without speaking to the prescriber first, unless skin damage forces you to. The device is part of a treatment plan, and only the treating team can safely change that plan.

Frequently asked questions

What is the difference between prosthetics and orthotics in simple terms?

A prosthetic device replaces a body part that is missing, while an orthotic device supports or corrects a body part that is still there. An artificial leg after amputation is a prosthesis; an ankle brace for foot drop after a stroke is an orthosis. The two professions share training and often share a clinic, but the purpose of each device is opposite: one fills an absence, the other assists what remains.

What is an orthosis, and is it the same as a brace?

An orthosis is the clinical term for any external device that supports, aligns, protects or corrects a joint, limb or the spine. Braces, splints, supports and insoles are all types of orthosis. The word comes from the Greek for “straight”, and orthoses work by applying controlled pressure around a joint. They range from soft elastic supports to rigid carbon-fiber shells, and may be worn briefly while an injury heals or long term for chronic conditions.

Is a prosthetist the same as an orthotist?

No, although many clinicians are certified in both. A prosthetist designs, fits and adjusts prostheses for people missing part of a limb. An orthotist designs, fits and adjusts orthoses for people whose limb or spine is present but needs support or correction. Both work with physicians, surgeons and therapists, and in many countries the combined role is called a prosthetist-orthotist, which is why the services are usually found side by side.

What are the main types of prosthetic devices?

Prostheses are grouped by the level of the missing limb. Lower-limb devices include partial-foot, below-knee and above-knee prostheses, the last adding a mechanical or microprocessor knee. Upper-limb devices include partial-hand, below-elbow and above-elbow prostheses, controlled passively, by a body-powered cable and harness, or myoelectrically through muscle signals. Within each level, feet, knees, hands, sockets and suspension systems vary, and the rehabilitation team matches components to the person’s strength, goals and daily environment.

How soon after an amputation can a prosthesis be fitted?

The surgical wound must heal and swelling must settle before a socket can be shaped, which the NHS describes as usually taking several weeks and sometimes longer when circulation is poor. Rehabilitation begins earlier, without the limb, focusing on strength, balance and keeping the remaining joints mobile. The first socket is often temporary because the residual limb keeps shrinking for months. The exact timing is set by the surgical and rehabilitation teams for each person.

Does wearing an orthosis make the muscles weaker?

A brace worn as prescribed does not weaken muscles; disuse does. Orthoses are prescribed alongside an exercise program rather than instead of one, and many are designed to assist movement while the person’s own muscles keep working. If an orthosis is used for healing, the plan usually includes stepping down support as tissue recovers. Any decision to reduce wearing time or stop belongs with the prescribing clinician, not with the wearer alone.

Why is walking with a prosthesis so tiring?

A prosthesis cannot generate power the way muscles do, so the remaining joints and the other leg work harder to swing, stabilize and push off. The NHS notes that walking with a prosthesis uses more energy than walking on two intact legs, and the demand rises with above-knee amputation because the knee must also be controlled. Fatigue early in rehabilitation is expected, and building cardiovascular fitness and strength is a standard part of the program.

Can a person with diabetes need both an orthosis and a prosthesis?

Yes, and this is a common combination. Protective insoles and footwear, which are orthoses, are prescribed to reduce ulcer risk in feet with reduced sensation. If an ulcer becomes infected and part of the foot is removed, a partial-foot prosthesis restores shape and push-off, while the other foot often still needs protective orthoses because it carries the same risk. Daily skin inspection matters for both devices, since numbness can hide damage.

What is phantom limb pain, and does a prosthesis help?

Phantom limb pain is pain that feels as if it comes from the part of the limb that has been removed. Sensation from a missing limb is very common after amputation, and painful sensations affect many people; they often ease over time but can persist (Mayo Clinic). Treatment approaches vary and are chosen by the treating team. A well-fitting prosthesis is one of those approaches, while a poorly fitting one can aggravate symptoms.

How do I know if my prosthesis or orthosis no longer fits properly?

The skin usually tells you first. Redness that does not fade after removing the device, hot spots, blisters, thickening calluses, new numbness or broken skin all point to a fit problem. A prosthetic socket that slides up and down with each step, or a brace that gaps or rubs where it did not before, are further signs. Weight change, swelling and time all alter fit, so report changes early rather than adapting around them.

References

• NHS: Amputation, recovery and living with an amputation
• World Health Organization: Assistive technology fact sheet
• NIH/PubMed: Estimating the prevalence of limb loss in the United States: 2005 to 2050
• MedlinePlus: Limb Loss

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.