In medicine, a prosthesis is an artificial device that is used to replace a missing body part. An orthosis is an externally applied device used to modify the structural characteristics of the skeletal system. What do you know about them?
True
False
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Polypropylene
Polyethylene
Transpolyisoprene
Polycapriolactone
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Hypermobile
Hypomobile
Normal
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True
False
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True
False
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True
False
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I
II
III
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Elevate the sole on the L
Elevate the heel on the L
Wedge the heel laterally
Wedge the heel medially
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Orthotic effectiveness is due to muscular response changes, not changes in joint alignment.
Orthotic devices should provide total surface contact to medial longitudinal arch and be dynamic.
THe foot should be in a neutral alignment and deformities should be corrected.
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Altered muscle activation
Altered sensory input
Controlled motion by changing joint alignment
Muscle response is changed
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It doesn't breathe.
It doesn't deform in the direction of stress.
It's porous.
It's moldable.
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That the foot must be in neutral position to be balance.
Neutral position is a position of neither supination or pronation.
FF and RF deformities do not affect alignment.
We must check STJ neutral and PROM and post depending upon what we see in NWB.
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Stress is force over tissue surface area.
Strain is the tissue's change in shape when stress is applied
The steeper the stress/strain curve, the more ductile the material.
The steeper the stress/strain curve, the more brittle the material.
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Rigid, medial post
Rigid, lateral post
Soft, medial post
Soft, lateral post
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True
False
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Low temp thermoplastic
High temp thermoplastic
Closed cell polyethylene foam
Polypropylene
Open cell polyethylene foam
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For every one degree of posting, there will be one mm of lift.
The FF can tolerate higher posting than the RF.
If > 12 degrees, divide posting between RF and FF.
If 6* or less, post 90-100% of the deformity.
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Bevel the lateral heel.
Flare the lateral heel.
Bevel the posterior heel.
Flare the posterior heel.
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True
False
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Spasticity
Hypotonia
Joint Contracture
Elongatin
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Plastizote
Polyethylene
Orfilite
Ppt
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Soft; medial post
Soft; lateral post
Rigid; medial post
Rigid: lateral post
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Creep
Viscoelasticity
Malleability
Hysteresis
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In the open kinetic chain, movement occurs both distal and proximal to the STJ axis.
CKC pronation is calcaneal eversion and talar adduction/PF.
OKC pronation is calcaneal eversion, adduction, and DF.
Pronation causes varus stresses at the knee.
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Converge, mobile
Converge, rigid
Are parallel, mobile
Are parallel, rigid
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RCSP
SLS RCSP
Tibial rotation
Navicular position
STJ neutral
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