Prosthetics & Orthotics 1
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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?
- 1.Which of the following plastics is commonly used as a topcover?
- A.
Plastizote
- B.
Polyethylene
- C.
Orfilite
- D.
Ppt
- 2.The clinical application that allows a material to return to its original shape easier than it took for original application is known as:
- A.
Creep
- B.
Viscoelasticity
- C.
Malleability
- D.
Hysteresis
- 3.
- A.
Soft; medial post
- B.
Soft; lateral post
- C.
Rigid; medial post
- D.
Rigid: lateral post
- 4.You are seeing a patient who has a compensated rearfoot varus. Which would be appropriate?
- A.
Rigid, medial post
- B.
Rigid, lateral post
- C.
Soft, medial post
- D.
Soft, lateral post
- 5.What type of plastic is plastizote?
- A.
Low temp thermoplastic
- B.
High temp thermoplastic
- C.
Closed cell polyethylene foam
- D.
Polypropylene
- E.
Open cell polyethylene foam
- 6.
- A.
Polypropylene
- B.
Polyethylene
- C.
Transpolyisoprene
- D.
Polycapriolactone
- 7.
- A.
It doesn't breathe.
- B.
It doesn't deform in the direction of stress.
- C.
It's porous.
- D.
It's moldable.
- 8.If you patient is a candidate for an orthosis and your goals are both motion control & shock absorption, which would you choose?
- A.
Rigid
- B.
Semi-rigid
- C.
Soft
- 9.
- A.
Stress is force over tissue surface area.
- B.
Strain is the tissue's change in shape when stress is applied
- C.
The steeper the stress/strain curve, the more ductile the material.
- D.
The steeper the stress/strain curve, the more brittle the material.
- 10.Your patient has a leg length difference of 1/10 of inch, L shorter than R. What would be appropriate?
- A.
Elevate the sole on the L
- B.
Elevate the heel on the L
- C.
Wedge the heel laterally
- D.
Wedge the heel medially
- 11.
- A.
For every one degree of posting, there will be one mm of lift.
- B.
The FF can tolerate higher posting than the RF.
- C.
If > 12 degrees, divide posting between RF and FF.
- D.
If 6* or less, post 90-100% of the deformity.
- 12.You have a patient who has too much pronation during gait. You decide to modify their heel to decrease pronation. What should you do?
- A.
Bevel the lateral heel.
- B.
Flare the lateral heel.
- C.
Bevel the posterior heel.
- D.
Flare the posterior heel.
- 13.
- A.
In the open kinetic chain, movement occurs both distal and proximal to the STJ axis.
- B.
CKC pronation is calcaneal eversion and talar adduction/PF.
- C.
OKC pronation is calcaneal eversion, adduction, and DF.
- D.
Pronation causes varus stresses at the knee.
- 14.According to Glasoe, if you apply a dorsal force to the 1st met head and it doesn't move, it would be classified as:
- A.
Hypermobile
- B.
Hypomobile
- C.
Normal
- 15.
- A.
That the foot must be in neutral position to be balance.
- B.
Neutral position is a position of neither supination or pronation.
- C.
FF and RF deformities do not affect alignment.
- D.
We must check STJ neutral and PROM and post depending upon what we see in NWB.
- 16.The total contact theory states that:
- A.
Orthotic effectiveness is due to muscular response changes, not changes in joint alignment.
- B.
Orthotic devices should provide total surface contact to medial longitudinal arch and be dynamic.
- C.
THe foot should be in a neutral alignment and deformities should be corrected.
- 17.
- A.
Altered muscle activation
- B.
Altered sensory input
- C.
Controlled motion by changing joint alignment
- D.
Muscle response is changed
- 18.The primary purpose of an accomodative orthosis is to control movement.
- A.
True
- B.
False
- 19.A callus on the 5th met head would indicate a supinated foot.
- A.
True
- B.
False
- 20.A straight last is better for a pronator.
- A.
True
- B.
False
- 21.Which of the following static measurements is not correlated with pronation during gait?
- A.
RCSP
- B.
SLS RCSP
- C.
Tibial rotation
- D.
Navicular position
- E.
STJ neutral
- 22.Permanent orthotic devices last 5 years, on average.
- A.
True
- B.
False
- 23.Which is not a clinical application of creep?
- A.
Spasticity
- B.
Hypotonia
- C.
Joint Contracture
- D.
Elongatin
- 24.Functional foot orthoses can range from semi-rigid to rigid,
- A.
True
- B.
False
- 25.At the midtarsal joint, there are two axes. During pronation, the axes _____. This allows the foot to become __________.
- A.
Converge, mobile
- B.
Converge, rigid
- C.
Are parallel, mobile
- D.
Are parallel, rigid
- 26.A lateral heel wedge would cause valgus at the knee. Therefore, it would be good for someone who has medial compression.
- A.
True
- B.
False
- 27.Which of Newton's laws do we use most when manufacturing orthotic devices?
- A.
I
- B.
II
- C.
III
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