Prosthetics & Orthotics 1

27 Questions | By Jen | Last updated: Oct 28, 2022 | Total Attempts: 4800

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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?

Questions and Answers

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.

You are seeing a patient with an uncompensated forefoot varus. Of the following, which would be appropriate?
- 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.

Which plastic is commonly used in prefabricated AFOs?
- A.
  
  Polypropylene
- B.
  
  Polyethylene
- C.
  
  Transpolyisoprene
- D.
  
  Polycapriolactone
7.

Which of the following is a FALSE statement about leather?
- 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.

Please select the statement that is false concerning stress and strain.
- 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.

Which of the following is NOT a rule to follow when posting?
- 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.

Which statement is true concerning the subtalar joint?
- 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.

Which of the following is false regarding the balance foot theory?
- 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.

Which is not a theory of the neuromuscular response theory?
- 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