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KAFO

Kelompok 2:Fityan hafidzMiftakhulfalah R

Setiyaji agung W

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KAFO

Sebuah orthosis yang mencakup wilayah knee joint, ankle joint dan foot.

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Sejarah KAFO

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KAFOs• Designs• Materials• Uprights• Joints

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KAFO Designs

– Metal – Plastic – Hybrid – Ischial weight bearing

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KAFO Materials

• Metal KAFOs – Uprights – Bands – Joints – Stirrups – Leatherwork

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KAFO Materials

• Plastic KAFOs – Thermoplastics – Uprights – Joints – Straps

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KAFO Uprights

• Aluminum – Lightweight

• Stainless Steel – Heavier but stronger

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KAFO Knee Joints

• Free/limited motion• Locking

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KAFO Knee Joints

• Single Axis Free Motion – Controls hyperextension – When M-L control is

needed

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KAFO Knee Joints

• Offset Free Motion – Axis is posterior – Increased knee extension

stability

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(left ) Ground Reaction Force in front of the Offset Knee Joint will produce anextension moment, maintaining the knee in extension, creating a stable KAFO

(right ) GRF behind the Offset Knee Joint will produce a Flexion moment,allowin the knee to flex creatin an unstable KAFO

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KAFO Knee Joints

• Polycentric Free Motion – Multiple axes of motion – More closely

approximatesinstantaneous axis of rotation in anatomicalknee joint

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KAFO Knee Joints

• Drop Lock – Metal ring drops over top

of joint, preventing flexion –

Simplest of locks

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KAFO Knee Joints

• Bale Lock – Both locks are connected

by metal hoop, or bale

–

Locks are disengaged bypulling bale up – Locks engage

automatically whenorthosis is extended

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Metal KAFO Ankle Joints

• Free motion• Dorsiflexion assist• Double-action

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Metal KAFO Ankle Joints

• Free/Limited Motion – ROM determined by

stirrup head shape

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Metal KAFO Ankle Joints

• Dorsiflexion Assist – Posterior spring creates

dorsiflexion moment

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Metal KAFO Ankle Joints

• Double-action – Anterior & posterior

channels allow for insertion of pins and/or springs to providevarious combinations of ROM and assist

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Plastic KAFO Ankle Joints• Free or limited motion• Variable motion

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Plastic KAFO Ankle Joints• Tamarack

– Flexible with no ROMcontrol

–

One variant can producedorsiflexion assist

DF Assist Neutral

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Plastic KAFO Ankle Joints

• Oklahoma – More rigid than Tamarack

with single axis of motion –

No inherent ROM control

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Plastic KAFO Ankle Joints

• Friddle Variable Motion – Allows fixed or variable

ROM –

Cannot be adjusted onpatient

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Plastic KAFO Ankle Joints

• Camber ankle joint – Cams are installed to

create limited ROM –

One of several designsusing interchangeablecomponents to producespecific ROM