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Disabled Village Children

A guide for community health workers, rehabilitation workers, and families

By David Werner


 
 

539

CHAPTER 58

Braces (Calipers)

Braces are aids that help hold legs or other parts of the body in useful positions. They usually serve one or both of 2 purposes:

1. To provide support or firmness to a weak joint (or joints). For example, this child had polio: 2. To help prevent or correct deformity or contracture. For example, this child had a club foot:
His leg is too weak to support his weight without help.

His leg is too weak to support his weight without help.

Function of the brace.

This brace keeps his knee from bending forward .

A baby with a club foot.

He was born with a club foot.

 His club foot was corrected with a cast.

His club foot was corrected with a cast.

The foot in a good position with a brace.

After correction, his foot is kept in a good position with a brace.


CAUTION: The need for braces should be carefully evaluated. Braces should be used only if they will help the child move better and become more independent. Too much bracing may actually weaken musclesand cause greater disability. As a general rule, try to use as little and as light bracing as possible to help the child function better. (See Chapter 56.)

Different braces for different needs

The main lower-limb brace types are:

Foot brace

Foot brace - made of folded plastic.

usually made of molded plastic

Foot brace - for deformities in the foot.

for deformities in the foot (not ankle) such as severe flat foot.

Below-knee braces (ankle brace)

for weakness or deformities in the lower leg, ankle, and foot.

Below and above knee braces. Above-knee brace (long-leg brace)

for weakness in the upper leg and knee - possibly also ankle and foot.

Above-knee brace with a hip-band

for severe weakness in hips and legs

Above-knee brance with a hip-band.


Less commonly used types (described on Page 547and Page 558) include:

Leg-separating braces

Leg-separating braces

for dislocated hips or damaged head of thigh bone (See Page 158.)

Foot-positioning night brace

for holding the feet, legs, and hips at a set angle when they tend to turn in.

Foot-positioning night brace.

Body brace or corset

for curve of the spine.

Body brace or corset

Body brace with leg braces

Body brace with leg braces

for body and back weakness together with hip and leg weakness.


540

Different materials and ways to make braces

As we discussed in Chapter 56, an ideal brace should:

bulletserve its purpose well (help the child walk or function better)
bulletbe comfortable
bulletbe lightweight yet strong
bulletbe as attractive as possible
bulletbe easy to put on and take off
bulletdo no harm
bulletbe low cost
bulletbe easy and quick to make with local tools and limited skills
bulletuse local or easily available materials
bulletbe easy to repair and adjust as the child grows or develops
bulletbe long lasting

Unfortunately no brace will meet all these requirements. As much as possible, try to put the child's needs first.

In this chapter we give ideas for making different braces using various materials. When deciding how to make a brace, carefully evaluate both the child's needs and the available resources (see Chapter 56).

Starting with a simple low-cost temporary brace or splint.

Sometimes it is wise to start with a simple low-cost temporary brace or splint to see how well it works and what the problems are.

Keep old and outgrown braces.

Keep old and outgrown braces for testing on new children before final braces are made.

But take care not to discourage the child by making him use braces that do not fit him well.


Examples of very simple, low-cost braces and splints:

A temporary leg splint of cardboard, folded paper, or the thick curved stem of a dried banana leaf, or palm leaf.

A temporary leg splint of cardboard.

Aluminum tube finger splint

Aluminum tube finger splint

Mango seed finger splint

Mango seed finger splint

Remove the woody coat of a mango seed, and wrap the coat firmly onto the finger. It will dry into a firm splint. To change its shape, first soak it in water.

Bamboo ankle splint

A piece of seasoned bamboo can be heated and bent.

Bamboo ankle splint

Plastic cup ankle braces for night or temporary use on a small child.

plastic cup - for a small baby
Plastic cup ankle braces - for a child


541

Metal or plastic braces

Modern, high-quality braces are usually made out of metal or molded plastic.

The best metal is a mix or 'alloy' of aluminum and steel which is both light and strong. However, this is very costly and often hard to get. Pure aluminum is very light, but breaks easily, especially when you try to bend it. Steel is cheaper and easier to bend and weld, but is much heavier.

The best plastic for braces is probably polypropylene, which is strong, light, and fairly easy to shape when hot.

plastic below-knee brace

metal below-knee brace with wood clog

Pre-formed metal parts for making these braces are sold at orthopedic supply stores. Unfortunately, they are usually much too expensive for a community program. However, sometimes you can get large orthopedic centers to donate old braces, from which locking knee joints and other pieces can be used to build high-quality metal or plastic braces. Also, many broken or outgrown braces are lying in the corners of thousands of homes. A campaign to get families to donate these can greatly reduce the costs of making high-quality braces.

Low-cost metal or plastic braces can be made in a village shop. They can be made simply, with or without joints. Since children grow quickly, they often need a larger brace every 3 to 6 months. Therefore, keeping cost low and work simple is essential. (See Chapter 56, Page 527.)

Metal and plastic braces each have advantages and disadvantages. We discuss these on Page 542 and 550.

In Mexico, we have found that for most children who need below-knee braces, plastic works best. And the children (and parents) like it more.

a child with a lot of muscle tightness may need a metal brace with an ankle strap.

However, a child with a lot of muscle tightness (due to spasticity or contractures) which pulls his foot a lot to one side, like this,

may need a metal brace with an ankle strap. After the brace is on, the strap is tightened to pull the foot into a better position.

Above-knee braces can be made using a combination of plastic and metal.


Whenever possible, equip your village shop to make both plastic and metal braces. That way, you can make what seems most appropriate for each child.


542

FITTING PLASTIC OR METAL BRACES

IMPORTANT: Correct measurements are essential for a good fit.

Below-knee brace should reach almost to knee, yet allow knee to bend all the way.

Brace or clog should grip heel and ankle closely.

Above-knee brace should reach to about 2 cm. below groin.

Upper part of leather or plastic of brace should fit around the thigh closely.

Knee hinge (if used) should be at the middle of the knee, both in height and from front to back.

Side pieces should be close to knee but not touch or rub the child when he walks.

Plastic brace & Metal brace

If the leg is very weak or joints are damaged, the top of the brace can have a lip on which the butt rests, to bear part of the body weight. (For design, see "Artificial Legs," Page 633.)

Lip under butt

KNEE PIECE

knee piece

Soft part of pad sits directly over kneecap.

HINGE AT ANKLE LEVEL

Hinge at ankle level .

Ankle hinges, if used, should be at the level of the bony lumps of the ankle.

Note: A brace with a hinge at ankle level is better than one with a hinge at foot level because it bends at the same height as the ankle joint. (However, a metal brace with ankle hinge is more difficult to make.)

HINGE AT FOOT LEVEL

Hinge at foot level

Side rod should attach at a point directly below the midline of leg.


METAL BRACES

The advantages of simple metal braces are that they are quick, easy, and cheap to make. They often last longer, and, if used with sandals or clogs, in hot weather they are cooler than plastic. However, they also have disadvantages: because a shoe, sandal, or wood 'clog' must be built or attached to the brace, there is additional work and cost. Also, they are heavy, clumsy, and more noticeable. In hot or wet weather, leather or cloth, or even the metal starts to rot. Shoes or boots which the child cannot change, even when they get wet, begin to stink.


543

METAL ROD BRACES* using 're-bar' (reinforcing rod for use in cement building construction)

For a brace shorter than 50 cm. (20 inches) you can use rod that is 5 mm. thick. For a longer brace, the rod should be thicker- up to 8 mm.

Bernd the rod like this.
Below knee
Above knee.


ABOVE-KNEE BRACE (top ring cover, back knee strap, knee piece)

Above-knee braces

Below-knee brace

These improved clog designs make walking smoother (see Page 544).

Improved clog designs


*Much of the information on metal braces, on this and the following pages, is taken or adapted from Poliomyelitis by Huckstep, and Simple Orthopaedic Aids by Chris Dartnell.


544

SHOES AND CLOGS FOR METAL BRACES

High-top leather shoes.

High-top leather shoes often work best, especially in communities where children usually wear shoes.

For adding thicker soles and making other changes, it helps to buy shoes with soles that are sewed on. (Today, many shoes have plastic or rubber soles that are glued on or molded with the shoe. These are much harder to work with.)

Unfortunately, leather shoes are costly. Also, they may not last long in rain and mud. So, you may want to make simple, low-cost wooden-soled shoes, or clogs. This design is from Simple Orthopaedic Aids.

rubber sole can be made of old car tire.

Strap clog and Lace-up clog.

1. Draw around the foot on a piece of wood about 2½ cm. thick. Be sure to use a wood that is not likely to split.
Draw around the foot on a piece of wood about 2 1/2 cm.


2. Leave extra space as shown (to allow for child's growth). Cut out the piece of wood.
Leave extra space


3. Carefully draw this shape on a piece of paper, using the length of the clog as a guide. Then cut it out.
Carefully draw this shape on a piece of paper.


4. Now draw both sides of leather top. Between the 2 sides add the width of the clog.
Now draw both sides of the leather top.


In communities where most children go barefoot, a disabled child may prefer more open clogs. This design is adapted from Huckstep's Poliomyelitis, and the Jaipur Sandal'.

Open clogs.


Note: These open clogs are hard to fit on deformed feet or feet with tiptoe contractures. In such cases, high-top clogs or boots work better. Or use plastic braces molded to fit the foot.


545

HOW TO CONTROL UP AND DOWN MOVEMENT OF FOOT

CONTROLLING FOOTDROP AND TIPTOE DEFORMITIES

A child with 'footdrop' or a floppy foot that hangs down.

A child with 'footdrop' or a floppy foot that hangs down so that she has to lift her leg high with each step,

A brace that holds the foot up.

needs a brace that holds the foot up. Use a plastic brace.

A metal brace with a backstop that lets the foot bend up.

or a metal brace with a backstop that lets the foot bend up, but not down.


Making a backstop

Making a backstop.


Toe-raising spring

Another way to help prevent footdrop is with a toe-raising spring. More complicated design,

This is a more complicated design

This is a simpler design.

Simpler design.


CONTROLLING FOOT-RISE AND UNWANTED KNEE-BEND

A child who walks with knees and feet bent up.

A child who walks with knees bent and feet bent up,

A stiff plastic brace

may (or may not) be helped by a brace that prevents the foot from bending up s much. If possible, use a stiff plastic brace.

Metal brace with a stop

Or use a metal brace with a stop placed in front of the upright bars.

A strong stop with a long plate will be less likely to work loose or damage the clog.

A strong stop with a long plate.

A child whose weak leg bends at the knee when he tries to put weight on it.

A child whose weak leg bends at the knee when he tries to put weight on it.

may need an above knee brace.

above-knee brace

But sometimes a below-knee brace that stops the foot from bending up will help push the knee back enough so that the child can support his weight on it. (See Page 557.)

The brace can be of stiff plastic, or metal with stops to Prevent foot-rise.

below-knee brace

If a brace with an ankle joint is used to prevent the ankle from bending up, the base piece will need a long, strong, forward plate.

A brace with an ankle joint.

The joint can be adjusted to allow only the desired range of motion.


546

KNEE HINGES

Braces with locking knee hinges permit the child to bend her knees for sitting or squatting.

Non-hinged brace

Non-bending knees are satisfactory for most children. The child can sit with her leg straight.

However, in some communities, a child may 'fit in' better if he can squat.

However, hinged braces have disadvantages: they are more costly and take longer to make. A child outgrows them quickly-unless they are adjustable. So use your judgment.

Hinged brace

The knee hinge locks for walking and unlocks for sitting or squatting.


Hinges on a round-rod brace

Hinges on a round-rod brace


A BETTER HINGE

Hinges on a round-rod brace (A better hinge)

A simpler hinge such as the ones above for a round rod can also be used on a flat rod.

A hinge for flat metal bar

A hinge for flat metal bar (open, locked)


BRACES THAT FOLLOW THE SHAPE OF THE LEG

Braces that follow the shape of the leg (Bend around knee,)

Flat metal bar can be bent to fit the shape of the leg more closely. This is not always necessary but if done well the brace will fit better - especially when the bar is used with molded plastic.

Instructions for bending and fitting the rod are on Page 557.

ADJUSTABLE BRACES

As the child grows, a brace made like this can be lengthened. Teach family members how to do this.

Adjustable braces (screws)


547

HIP BANDS

Braces with a hip band may be needed for the child:

whose leg (or legs) is so weak at the hip that it flops or turns far out to one side,
A child whose leg is so weak at the hip.
or whose legs tend to twist too much inward (or outward).
Child whose legs tend to twist too much inward.
With hip band


A common problem with hip bands is that the low back bends forward and the butt sticks out.

A common problem with hip bands is that the low back bends forward and the butt sticks out. This can cause back problems, and hip contractures.

A hip band that dips down in back to push in the butt helps prevent this problem.

A hip band that dips down in back to push in the butt helps prevent this problem.

If necessary, add an elastic strap here.


The back of the hip band can be made of thin metal lined with leather, or of strong plastic.

The back of the hip band.

On plastic braces the side bars and hinges can also be made of thick, strong plastic. This adds some flexibility, which will be better for some children but not provide enough support for others.

A child who tends to flop forward at the hips.

A hip band with a locking hinge.

A child who tends to flop forward at the hips, may need a hip band with a locking hinge.

You can use the design on Page 546.

Metal ring lock

Braces with plastic hip band and locking plastic hip hinges.

Hip band without lock

Hip band without lock

Hip band with lock

Hip band with lock

For a young child whose feet turn in a lot, a night brace to hold the feet (and hips) turned outward may help. It can be made from a thin metal bar or from wood.

A night brace to hold the feet (and hips) turned outward.


548

KNEE PIECES (Use the design on Page 543.)

A child with a weak leg that straightens normally.

A child with a weak leg that straightens normally,

needs a slightly loose strap behind the knee,

A slightly loose strap and a firm comfortable knee piece.

and a firm, comfortable knee piece.

A child with a leg that does not quite straighten.

A child with a leg that does not quite straighten,

Knee piece that firmly pulls the knee back.

needs a knee piece that firmly pulls the knee back.


A child with a knee that bends backward,

A child with a knee that bends backward.

needs a firm strap behind the knee that lets the knee go back only a little.

A firm strap behind the knee.

A plastic brace that distributes pressure over a wide area above and below the knee.

For children with a severe back-knee problem, it is often better to use a plastic brace that distributes pressure over a wide area above and below the knee. (This is more comfortable than a behind-the-knee strap that presses only on a small area.)


A leg that bends in at the knee,

A leg that bends in at the knee.

needs a knee piece that pulls the knee outward,

and also one that pulls the knee back (as shown above).

A leg that bends out at the knee,

A leg that bends out at the knee.

needs a knee piece that pulls the knee inward,

and also one that pulls the knee back.

When necessary you can use 3 knee pieces:

3 knee pieces


ANKLE STRAPS

For an ankle that bends out, use a strap that pulls the ankle in.
A strap that pulls the ankle in.


A sole raised on the outer side may also help.
A sole raised on the outer side.


Shape of ankle strap

For an ankle that bends in, use a strap that pulls the ankle out.
A strap that pulls the ankle out.


A sole raised on the inner side may also help.
A sole raised on the inner side.


549

RAISED SOLES OR 'LIFTS' for one leg that is shorter

(For instructions on measuring leg length difference and for homemade measuring instruments, see Page 34.)

For a child who has one leg shorter than the other.

Measure the difference in leg length.

Make the 'lift' of the sole about 1 cm. shorter than the difference in leg length.

A child who has one leg shorter than the other.

Note: Almost all children have one leg that is a little shorter than the other, and this does not usually affect how they walk. Raised soles ('lifts') are usually not needed if the difference in leg length is less than 2 cm.

However, a child who drags a foot because his hips tilt down on that side may be helped by a small lift on the other side-even if that leg is the same length or longer (See Page 163.)


IMPORTANT: Before putting a permanent lift on a shoe or sandal, test it by tying or taping on a temporary lift. Watch the child walk and ask how he likes it. You may want to try several heights before deciding on the one that works best.

Tie on a temporary lift with string, tape, or a loop of inner tube.

Material used for lifts should be as lightweight as possible. You can use cork or a light, porous rubber. If the material is heavy but strong, to make it lighter you can drill holes through it. Put a thin, strong sole on the bottom.

Put a thin, strong sole on the bottom.

For a lift with a stiff-ankle brace, the child can often walk more smoothly with a 'rocker-bottom' sole.

Fhat middle section for firm standing.

A child with a mild to moderate 'back-knee'.

This helps push the knee forward when the child puts her weight on her foot.

A child with a mild to moderate 'back-knee', may be helped by a heel that extends backward. This helps push the knee forward when the child puts her weight on her foot.

For a more severe back-knee, the child may need a long-leg brace (See Page 67and 548.)

A high lift, when needed, can be built into a bar brace.

A high lift can be built into a bar brace.

Ask a local shoe or sandal maker to teach you how to fasten on the soles and lifts.

550

PLASTIC BRACES

Below the knee

For most children who need a below-knee brace, plastic braces molded to fit the leg and foot of the individual child have many advantages:

Plastic braces (for school and work)

bulletThey are lightweight and often more comfortable than metal braces.
bulletThey fit the child comfortably and exactly (if made well).
bulletThey can be worn with ordinary shoes or sandals, which can be easily changed when they get worn out or wet. Shoes can be changed for school and for work.
bulletThey are water resistant and easy to clean.
bulletThey are less noticeable than metal braces. If desired, socks can be worn over them to hide them.
bulletChildren usually prefer them and are more likely to keep wearing them.

Although a little more equipment and skill are needed to make plastic braces, once a village worker has learned the basic technique, they can be made as quickly and easily as a simple metal brace with a clog.

A disadvantage to plastic braces is that usually after a year or two the plastic 'gets tired' and breaks. However, growing children need larger braces fairly often. It is wise to keep the plaster mold of each child's brace so that a new brace can be easily made if needed.

A suggestion to save time and money:

Keep the mold of the child's foot.

Keep the mold of the child's foot - or have the family keep it.


The biggest expense in making plastic braces is the plaster bandage used for casting a mold of the leg. The cost can be reduced a lot by making your own plaster bandage material (see Page 569).

Plastic braces can feel uncomfortable in hot weather and can lead to skin irritation and fungus infections if care is not taken. They can be made cooler by drilling 'breathing holes' in them. Or cut out a hole in the back.

Plastic braces

Sometimes if you cut a hole out behind the heel, the brace rubs less and is more comfortable.

CAUTION: Do not put breathing holes in the lower part of the brace which has to be the strongest.

To prevent skin irritation, it is important to bathe daily. It also helps to wear cotton (not nylon) stockings under the brace and to use clean stockings every day.

The design of plastic brace.
see Page 545 and 557

551

How to make plastic braces

Here we describe 2 methods for making molded plastic braces:

The first method uses old plastic buckets or containers, and needs less equipment. Unfortunately, these braces tend to break easily when used for walking. However, they make excellent, low-cost night braces(to wear while sleeping).

The second method uses sheets of polypropylene plastic. Additional equipment (such as a vacuum sweeper) is needed, and it is a little more expensive. However, the result is a high- quality brace that can last for months or sometimes years.

Method 1: Plastic bucket braces

Equipment and materials needed:

bullet'stockinette', old stocking or thin cloth strips (for wrapping leg before casting)

'Stockinette', old stocking or thin cloth strips.

bulletlarge plastic bucket or containers to be cut up. Plastic should be at least 2.5 mm. thick and of flexible (not brittle) plastic

Large plastic bucket

bulletplaster bandage rolls for plaster casts. (To reduce costs, roll your own. See Page 569.)

Plaster bandage.

bulletother buckets or water containers

Other buckets or water containers.

bulleta sharp knife or single-edged razor blade

A sharp knife.

bulletsaw or strong scissors for cutting plastic

Saw or strong scissors.

bulleta piece of soft rope about 1/2 meter long

A piece of soft rope.

bulletan oven (wood, gas, or electric)

An oven

bulleta piece of old reinforcing rod, pipe, or iron, bent to fit inside the foot cast

A piece of old reinforcing rod.

bulletlarge metal cooking tray or sheet of metal

Cooking tray

bulletthick gloves or potholders

Gloves or potholders

bulletfast-setting building plaster for the solid plaster mold

Building plaster.

bulletsmall soldering iron

Soldering iron.

bulletif possible, a gas burner, torch, or 'heat gun' to 'spot heat' the plastic, (Note: A hair dryer does not give enough heat.)

A gas burner, torch or 'heat gun'.

bullet2 pieces of wood nailed together to form a rack to hold cast in this position

A rack

bulletdrill and bits

Drill and bits.

hand or electric

Hand or electric.

bulletseveral long rubber strips cut from car tire

Long rubber strips.

bulletstrap and buckle or Velcro (plastic straps, one with barbs and the other with hairs so that they stick to each other)

Strap and buckle

bullettools for smoothing plaster and plastic: file or rasp, piece of broken glass, piece of wire screen

File or rasp, broken glass, and wire screen.

bulletglue or rivets or both

Glue or rivets


552

Making the plastic-bucket brace consists of 3 main steps:

A. Making a hollow plaster cast of the child's leg

B. Making a solid plaster mold of the leg

C. Heat-molding the plastic-bucket brace

A. Making the hollow cast

1. Tie a knot in the end of a soft rope

Tie a knot.

2. Put the rope on top of the leg with the knot between the toes.

Put the rope on top of the leg.

3. Put the stocking tightly on the foot with the rope inside (or wrap it with a thin cloth).

Avoid wrinkles.

The rope stays very straight,

Make sure the rope stays very straight.

4. Wet a plaster bandage and squeeze out the extra water.

Wet a plaster bandage and squeeze out.

5. Wrap on a thin cast (about 3 layers) while someone else holds the foot in a good position. Be sure the heel is covered with several layers.

Wrap on a thin cast.

6. While the plaster is still wet, smooth it gently with moist hands, and press the cast gently into all the hollows of the fool.

Smooth it gently with moist hands and press the cast gently into all the hollows of the foot.

7. Before the plaster becomes firm, place the foot in exactly the position that you want the brace to hold it in. Sometimes it works well to hold the foot in your hands. But often it works best to have the child step firmly on the floor, or on a padded board.

Position the leg straight up, from side view and front view.

Be sure to position the leg straight up, from side view and front view.

8. Draw some lines over the front of the cast.

Draw some lines over the front of the cast.

9. When the cast is almost firm but still damp (usually in 5 to 10 minutes), carefully cut through the plaster over the rope. Take care not to cut the child.

Carefully cut through the plaster over the rope.

10. Then gently remove the cast without changing its shape.

Gently remove the cast without changing is shape.

11. Quickly (before it is fully hard) close the cast, line up the lines you drew, and tie it shut with cloth or string.

12. Tie a cloth tightly over the opening of the toes.

Tie a cloth tightly over the opening of the toes.

B. Making the solid plaster mold

1. Put a bent piece of rod into the hollow cast.

Put a bent piece of rod into the hollow cast.

2, Hold the cast in a standing position - perhaps in a box of sand.

Hold the cast in a standing position.

3. Mix the plaster: Put water in a container, enough to fill the cast.

Put water in a container, enough to fill the cast.

While stirring, sprinkle dry plaster into the water. Keep adding until the mix is just thick enough that wrinkles stay a moment on the surface.

Sprinkle dry plaster into the water.

4. Quickly pour the mix into the cast. Jiggle the rod and tap the cast to be sure the mix fills all spaces.

Quickly pour the mix into the cast.

5. Hold the rod in the middle until the plaster is firm.

Hold the rod in the middle until the plaster is firm.

6. After plaster hardens fully (about one hour) remove the solid mold.

Remove the solid mold.

7. Being careful not to change the shape or size of the mold, use fresh plaster to fill in any holes or pits that are not caused by the shape of the foot. Add a little fresh plaster over bony places (so final brace will not rub).

Use fresh plaster to fill in any holes or pits that are not caused by the shape of the foot.

8. Smooth the surface (with a file, piece of wire screen, or piece of broken glass). Do not reduce any of the bumps caused by the bones.

Smooth the surface.


553

C. Heat-molding the plastic-bucket brace

1. Mark on the child's leg the shape of the brace.

Mark on the child's leg the shape of the brace.

2. Take measurements as shown for the width and length of the brace.

Take measurements as shown for the width and length of the brace,

3. Draw an outline on paper, according to the measurements and cut out the pattern.

Draw an outline on paper.

4. Mark the pattern on the plastic.

Mark the pattern on the plastic.

5. Cut out the pattern with a saw or strong scissors.

Cut out the pattern.

6. Make V-shaped cuts here to help bend the hot plastic around heel.

Make B-shaped cuts.

7. Heat the oven to at least 450 ° F (230° C). If you cannot measure or control heat, put a small piece of plastic into the oven and heat it until the plastic becomes soft and gooey.

If you cannot measure or control heat, put a small piece of plastic into the oven and heat it.

8. Heat the plaster leg cast in the hot oven for 15 to 20 minutes.

Heat the plaster leg cast in the hot oven.

9. Put the hot mold on the rack.

Put the hot mold on the rack.

10. Lightly sprinkle dry plaster or talc on a metal sheet or tray.

Put the plastic form on tray.

11. Put the plastic form on tray and put the tray into the hot oven.

12. Leave it in oven only until plastic becomes somewhat flexible.*

Put the plastic form on tray and into the hot oven.

13. Take hot plastic out of oven with gloves. Bend it over the hot mold.

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14. With strips of rubber, wrap plastic tightly to force it against the mold.

Wrap plastic tightly.

15. And put it back into oven until plastic gets softer.*

Put plastic back into oven.

16. Remove from hot oven and press forcefully (with gloves) to fuse overlapped plastic at heels.

Remove plastic from hot oven and press forcefully.

17. Also press in any hollows around bones and on bottom of foot. Keep pressing until plastic begins to cool and stiffen.

Press in any hollows around bones and on bottom of foot.

18. While brace is cooling, heat soldering iron.

Heat to moderate heat - not red hot. Heat soldering iron to moderate heat.

19. Unwrap cloth from brace while still warm and use soldering iron to smooth and weld heel joint.

Unwrap cloth from brace.

20. When cool, trim and smooth the edges of the brace.

When cool. trim and smooth the edges of the brace.

21, Glue or rivet a strap near the top of the brace.

For night splints, add 1 or 2 more straps at the ankle and foot.

Glue or rivet a strap near the top of the brace.


For easier fastening, use Velcro straps.

Velcro straps.

For day use or use with sandals or shoes, only the upper strap is needed.When the upper strap is needed, use with sandals or shoes.

Note: Braces made from plastic buckets or containers tend to break fairly easily if a larger child uses them for walking. It is better to use polypropylene plastic (see next page).


*Take care not to overheat the plastic, because the plastic used for many buckets and containers tends to wrinkle like bacon when it gets too hot.


554

Method 2: Polypropylene braces

Polypropylene is a special plastic available in large sheets from orthopedic supply stores and some plastic factories. For most braces, sheets 30 cm. by 60 cm. (1 foot by 2 feet) are large enough. Thickness should be 3 mm. (1 /8 inch) for thinner, more flexible braces and 4 mm. to 5 mm. (3/16 inch) for stronger, less flexible braces.

Polypropylene, where available, is usually the best plastic for braces. It is flexible but strong. It is easy to stretch and mold when hot. Cost is US $1.00 to $2.00 per brace Polyethylene can also be used but is more likely to wrinkle like bacon if it gets too hot. You can experiment with whatever plastic you find. A program in Pakistan uses plastic bus windows, although this hard clear plastic (Plexiglas) is more difficult to stretch and shape when hot.


This method is the one used by professional brace makers. Here we simplify it as much as possible. Equipment and materials needed are mostly the same as in Method 1 (see Page 551). However, high-quality braces can be made more easily with a few extra pieces of equipment (they are not absolutely necessary). This extra equipment includes:

· special oven*

SIMPLE SHEET-METAL BOX OVEN
(riveted or soldered together)

sheet of metal (preferably aluminum, because it spreads heat best) at least 6 mm. (1 /4 in. to 1/2 in.) thick.

Simple sheet-metal box oven.

It you can get it, rivet a piece of 'Teflon' cloth over the metal sheet. This will help keep the hot plastic from sticking to the metal, Or you can use a Teflon spray.

Rivet a piece of 'Teflon' cloth over the metal sheet. / Burn wood or cow dung.

The 'oven' can be placed over any source of heat. Use the cooking fire, or you may want to build a simple fireplace to support it.

COMPLEX GAS OR ELECTRIC OVENS
(designs from Huckstep's Poliomyelitis.)

Complex gas or electric ovens.

· vacuum sweeper

(if electricity is available) or other form of suction. (The suction pulls the hot plastic tightly against the cast until it cools. However, this is not absolutely necessary.)

Vacuum sweeper.

· metal pipe

Tape it to the end of the vacuum sweeper hose.

The pipe should be a little bigger than the rod used in the leg cast. By bending the rod slightly, it will fit very tightly into the pipe.

Figure out some way to clamp or bolt the pipe firmly to a strong bench or table.

Metal pipe.

Put 2 notches in the pipe so it will breathe when pushed up against the plaster.

· electric cast-cutter

These are very expensive but a great help if you are making a lot of plastic braces.

Electric cast-cutter.

If you do not have a cast-cutter you may have to use a hammer and chisel to cut the plastic. You can heat the chisel so that it will melt the plastic.

You may have to use a hammer and chisel to cut the plastic.

*Some brace makers in Pakistan use no oven, but simply hold the plastic sheet over a 'chula' (earth pot) of hot coals. See photo on Page 538.

555

Making the polypropylene (or polyethylene) brace

Steps A and B are the same as described for Method 1 (see Page 552).

Step C. Heat-molding the plastic brace

1. Put the rod of the plaster mold into the vacuum pipe. Be sure it is very tight. (If not, take it out and bend the rod a bit more.)

Put the rod of the plaster mold into the vacuum pipe.

2. Stretch stockinette or stocking tightly over the cast and tape it to the pipe.

Stretch stockinette tightly over the cast and tape it.

3. Sprinkle dry plaster powder or talc over the entire foot and smooth it with your fingers.

Sprinkle dry plaster.

4. Preheat the 'oven' and sprinkle plaster powder or talc evenly over the hot metal sheet.

Preheat the 'oven'.

5. Cut a piece of polypropylene plastic large enough to stretch around the entire foot, and put it into the oven to heat.

A piece of polypropylene.

6. As the plastic gets hot enough to mold, it will turn clear so you can easily see through it It often gets clear in the middle first.

The hot plastic enough to mold.

7. To move the hot plastic, 2 persons must wear thick gloves. Sprinkle dry plaster powder, lime, or talc on them.

Thick gloves.

8. As the plastic is getting hot, turn on the suction (vacuum cleaner) and listen for a hissing sound where the pipe joins the cast. (This means the suction is working.)

Listen for a hissing sound where the pipe joins the cast.

9. When the plastic is hot enough (clear and limp), remove the oven lid, lift the hot plastic by its 4 corners, and quickly stretch it over the whole cast.

Remove the oven lid, lift the hot plastic by its 4 corners, and quickly stretch it over the whole cast.

10. Quickly pinch the edges of the plastic together along the bottom side of the leg and around the pipe. Squeeze together all edges to form a seal. You must work quickly to complete the seal before the plastic gets too cool.

Pinch the edges of the plastic together along the bottom side of the leg.

As soon as the seal is complete, the suction should pull the hot plastic close against the cast. But if necessary, help by pushing it into the hollows.*

11. While the plastic is still hot and soft, cut off the extra with a sharp knife or strong scissors.

Cut off the extra with a sharp knife or strong scissors.

12. After it cools, draw the form of the brace on the plastic,

Draw the form of the brace on the plastic.

13. and cut it out either with a cast cutter.

Cut out with a cast cutter.

or a hammer and chisel,

Cut with a hammer and chisel.

or a red hot soldering iron, or however you can.

Finish the brace in the way described under Method 1 (steps 20 and 21).


* If no suction equipment is available, you can heat mold the plastic by stretching it over the cast and pushing in the hollows until it cools. With practice, this gives almost as good results, and you only need about half as much plastic.


556

Making sure plastic braces fit well and are comfortable

The most common problem with plastic braces is that they press on bony bumps. To avoid this,

Small pads.

A little fresh plaster.

put small pads over bony bumps before casting foot. Or, put the pads on the mold, and add a little fresh plaster to the bony bumps before molding the plastic.

When the child wears the plastic brace, if it presses too much on bony places, or elsewhere,

heat a small area over the spot where the bone presses, and with a smooth, rounded stick push the hollow deeper.(Use a heat gun if you have one)

Have a rounded stick push the hollow deeper.


Soft padding

inside the brace can make it more comfortable. Places that may need to be padded are:

Soft padding (edges, upper part, over body places or points of pressure)


For padding you can use a product called 'moleskin', or a special foam plastic material available from orthopedic supply stores. Or you can glue in pieces of cotton blanket or car inner tube (but make sure the child wears cotton stockings to avoid skin problems).

The sole of the brace can end at the ends of the toes (or slightly beyond to allow for growth).

The sole & side of the brace.

The side of the brace at the foot can extend to the toes if necessary for support

Or the sole can end at the base of the toes.

The sole can end at the base of the toes.

For better comfort and shoe fit, the side can dip down around the base of the big toe.

AVOID brace edges that stop at middle of toes.

Be sure to avoid!!

Avoid an edge that curves in (better to heat it and bend it out a little).

AVOID brace edges that pass across the middle of bony bumps. The edge should be either behind or in front of the bump.


Deciding how wide or narrow to make the sides of the brace at different points will depend on the needs of the particular child.

A child whose ankle or foot is floppy or deformed, or who needs a stiff ankle brace to help push back a weak knee (see Page 557) may need a brace with wide sides at the ankle and foot.

A brace with wide sides at the ankle and foot.

A child who needs only the ankle stabilized may walk better with a brace that lets the front of the foot bend up and down a little.

A brace that lets the front of the foot bend up and down a little.

Many children benefit by a brace that allows some up and down ankle movement but prevents sideways movement.

This can be done by cutting back the sides of the brace here.

This will be the weak point in the brace. So, the plastic must be extra thick here.

Ankle movement can be done by cutting back the sides of the brace here.

You can strengthen ankle by putting extra strips of hot plastic on the back of the plaster mold.

Or you can strengthen it by putting extra strips of hot plastic on the back of the plaster mold before stretching the whole plastic over it.


557

Different plastic brace models for different needs

In various places in this book we have shown different brace models and how they meet the particular needs of a child. See, for example, Page 66 to 73 and Page 116. Here are a few more ideas for different plastic braces:

Below-knee brace that gives knee support

The child with a weak upper leg whose knee cannot support her full weight.

A brace that pushes her knee back.

The child with a weak upper leg whose knee cannot support her full weight, may be helped enough by a brace that pushes her knee back.

A strong stiff ankle on the brace, with the foot tilted down slightly (more than 90°C), pushes the knee back when she steps.

Front of brace presses against knee.

The simplest way to make this brace is to rivet the seam where the plastic joins in front. (See photo, Page 550.)

CAUTION: The shoe or sandal may affect the angle of the foot. Allow for this when deciding the angle for the foot of the brace.

The shoe or sandal may affect the angle of the foot.

A similar brace can be made in 2 parts.

1. Make the lower part, and place it back on the plaster mold.

Place the mold and Form the top part of the brace over the lower part.


2. Place the mold like this and form the top part of the brace over the lower part.

When the child grows, this brace can be made longer by removing the rivets and separating the 2 ends more.

The brace can be made longer by removing the rivets and separating the 2 ends more.


Side-support knee brace

A brace that supports the knee may help a child that has a sideway bend or partial dislocation of the knee.

Make the brace higher on the side.

Above-knee plastic braces

The simplest kind of above-knee plastic brace is a single piece without a knee hinge.

The simplest kind of above-knee plastic brace.

You can make it in the same way as a below-knee brace, with or without a footpiece. These braces are useful on small children.

To make a jointed above-knee brace:

1. Draw the shape of the child's leg on paper.

Draw the shape of the child's leg on paper.

2. Mark the height of the

Mark the height of the hip bone, crotch, mid-knee and ankle bone.

3. After forming the plastic pieces on plaster molds, bend metal joint pieces so they fit the shape of the leg.

Bending the flat bar.

To bend the flat bar, make or buy a bending iron.

Bend metal joint pieces to fit the shape of the leg.


4. Temporarily pin or bolt the plastic pieces to the metal pieces. Then you can adjust the front-to-back angles with the brace on the child.

Temporarily pin or bolt the plastic pieces to the metal pieces.


5. When the angles are right, mark the position, and after checking all aspects of fit, rivet the pieces together and add straps and knee supports.

Rivet the pieces together and add straps and knee supports.


Hinged braces can also be made using the plastic itself for knee hinges,

and even ankle hinges

However, these hinges may not last long with heavy use.

Hinged braces


558

BODY SUPPORTS

body supports-1 body brace-2

In most cases, a body brace or body jacket probably does little or nothing to correct or prevent further curving of the spine. However, a child with a 'flail' spine that curves so much that it makes sitting difficult or awkward, may sit more comfortably and have more use of her arms if she has a body brace.

Making a plastic body brace

1. Put small pads over upper outer corners of hip bone.

Put small pads.

2. Put a stockinette or old tight-fitting shirt on the child.

Put stockinette on the child.

3. Cast the child's body with plaster bandage while holding her in a sitting position.*

Cast the child's body.

4. Cut the cast into 2 halves and remove.

Cut the cast into 2 halves and remove

5. Tape or tie the 2 halves of the cast together and put it into a plastic bag.

Tape or tie the 2 halves and remove.

6. Make a solid plaster mold inside the cast (see Page 552).

A solid plaster mold inside the cast.

You can make it lighter and save plaster by mixing sawdust or bits of plastic foam into the plaster

7. Remove the plaster mold and smooth it carefully to keep its shape, especially the waist and hip curves.

Remove the plaster mold and smooth the waist and hip curves.

8. Stretch hot plastic over the mold as described on Page 555. If your oven or sheets of plastic are not big enough, you may have to mold it in 2 halves, front and back.

Stretch hot plastic over the mold.

9. Mark and cut the plastic. Leave a little room under arms.

Cut breathing holes and perhaps a large central hole over the stomach.

10. Try it on the child. Make adjustments. Smooth edges. Add padding and straps.

Make adjustments and Smooth edges.


A body brace attached to leg braces may be needed by a child whose body is weak from the chest down.

A body brace attached to leg braces.


* Casting can also be done with the child lying lengthwise over a wide strip of cloth stretched between two points.

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