ORTHOTICS QUESTION AND ANSWERS
2025 UPDATE
When correcting a tracing for a metal AFO, what is the added clearance for metal width
at the calf band location?
1/4"
1/2"
3/4"
3/16" - 1/4"
What nerve could be compressed when pressure is applied at Fibular head level?
Acetabular
Peroneal
Mastoid
Glenoid - Peroneal
On a HKAFO the medial hip height is always ________ to the lateral height?
Higher
Behind
Lower
All of the above - lower
4. The deepest point on a metatarsal pad is in line with which metatarsal head?
1st
2nd
3rd
4th - 2nd
How many arches are in the foot ?
1
2
3
4-3
Which thermoforming plastic listed is the stiffest?
,Polypropylene
Polyethylene
Proflex
Copolymer - polypropylene
On a typical thermoplastic AFO, the starting trimlines of the calf section wrap around
_____ of the circumference.
50%
65%
75%
80% - 75%
When bending the palmar section of the Long Opponens hand splint, how much space
is left to accommodate the foam liner?
5/8"
1/2"
3/16"
1/4" - 1/4"
When fabricating the calf band for a metal AFO what is the formula for calculating the
length of metal needed?
½ calf circumference
½ Calf circumference + 2"
½ Calf circumference + 1 ½"
½ Calf circumference + 2 ½" - 1/2 calf circumference + 1 1/2"
which of the following is true about the lumbosacral joint?
a. ball and socket joint
b. located between L5 and sacrum
c. the largest joint of the body
d. where the hip joints connect with the pubic bone - located between L5 and sacrum
11. Which head shape has a longer AP and shorter ML?
Scaphycephaly
Plagiocephaly
Brachycephaly - scaphycephaly
12. For a GRAFO, the trimlines being anterior to the malleoli, create what type of
biomechanical force?
, Dorsiflexion assist
Plantarflexion assist
Dorsiflexion resist/stop
Plantarflexion resist/stop - dorsiflexion resist/stop
13. What is the most common occurring double curve in idiopathic adolescent scoliosis?
Left thoracic, left lumbar
Right thoracic, left lumbar
Left thoracic, Right lumbar
Right thoracic, right lumbar - right thoracic, left lumbar
14. For a thermoplastic AFO, what are the typical plaster buildups at the malleoli?
lateral 3/16th & medial 1/8th
lateral 1/8th & medial 3/8th
lateral 1/8th & medial 3/16th
lateral 3/8th & medial 1/8th - lateral 1/8th and medial 3/16th
which of the following is not reccommended to do when modifying for a CROW boot?
a. carve dorsum to allow the foot to compress into the foam on the plantar aspect
b. build up bony prominences with minimal clearance so no large spaces are created
c. do not extend the footplate so total contact is made
d. flair proximal brim to ensure the orthosis does not dig into the patient - do not extend
the footplate so total contact is made
16. What is one biomechanical purpose of a metatarsal pad?
Provide support for the lateral longitudinal arch
Help support/maintain the transverse arch
Help the patient's foot flex
Stabilize the midfoot against flexion - helps support and maintain the transverse arch
17. When thermoforming a thermoplastic WHO lined with foam, once the foam liner is
formed and secured to the plaster model, what should be done in preparation for pulling
the plastic shell?
Spray liner with silicone
Remove liner and set aside for later
Rotate model so the seam is facing down
Spray liner with glue to help adhere the plastic - rotate the model so the seam is facing
down
18. When aligning the Oklahoma joints, where should the ankle joint axis be located on
the plaster model?
2025 UPDATE
When correcting a tracing for a metal AFO, what is the added clearance for metal width
at the calf band location?
1/4"
1/2"
3/4"
3/16" - 1/4"
What nerve could be compressed when pressure is applied at Fibular head level?
Acetabular
Peroneal
Mastoid
Glenoid - Peroneal
On a HKAFO the medial hip height is always ________ to the lateral height?
Higher
Behind
Lower
All of the above - lower
4. The deepest point on a metatarsal pad is in line with which metatarsal head?
1st
2nd
3rd
4th - 2nd
How many arches are in the foot ?
1
2
3
4-3
Which thermoforming plastic listed is the stiffest?
,Polypropylene
Polyethylene
Proflex
Copolymer - polypropylene
On a typical thermoplastic AFO, the starting trimlines of the calf section wrap around
_____ of the circumference.
50%
65%
75%
80% - 75%
When bending the palmar section of the Long Opponens hand splint, how much space
is left to accommodate the foam liner?
5/8"
1/2"
3/16"
1/4" - 1/4"
When fabricating the calf band for a metal AFO what is the formula for calculating the
length of metal needed?
½ calf circumference
½ Calf circumference + 2"
½ Calf circumference + 1 ½"
½ Calf circumference + 2 ½" - 1/2 calf circumference + 1 1/2"
which of the following is true about the lumbosacral joint?
a. ball and socket joint
b. located between L5 and sacrum
c. the largest joint of the body
d. where the hip joints connect with the pubic bone - located between L5 and sacrum
11. Which head shape has a longer AP and shorter ML?
Scaphycephaly
Plagiocephaly
Brachycephaly - scaphycephaly
12. For a GRAFO, the trimlines being anterior to the malleoli, create what type of
biomechanical force?
, Dorsiflexion assist
Plantarflexion assist
Dorsiflexion resist/stop
Plantarflexion resist/stop - dorsiflexion resist/stop
13. What is the most common occurring double curve in idiopathic adolescent scoliosis?
Left thoracic, left lumbar
Right thoracic, left lumbar
Left thoracic, Right lumbar
Right thoracic, right lumbar - right thoracic, left lumbar
14. For a thermoplastic AFO, what are the typical plaster buildups at the malleoli?
lateral 3/16th & medial 1/8th
lateral 1/8th & medial 3/8th
lateral 1/8th & medial 3/16th
lateral 3/8th & medial 1/8th - lateral 1/8th and medial 3/16th
which of the following is not reccommended to do when modifying for a CROW boot?
a. carve dorsum to allow the foot to compress into the foam on the plantar aspect
b. build up bony prominences with minimal clearance so no large spaces are created
c. do not extend the footplate so total contact is made
d. flair proximal brim to ensure the orthosis does not dig into the patient - do not extend
the footplate so total contact is made
16. What is one biomechanical purpose of a metatarsal pad?
Provide support for the lateral longitudinal arch
Help support/maintain the transverse arch
Help the patient's foot flex
Stabilize the midfoot against flexion - helps support and maintain the transverse arch
17. When thermoforming a thermoplastic WHO lined with foam, once the foam liner is
formed and secured to the plaster model, what should be done in preparation for pulling
the plastic shell?
Spray liner with silicone
Remove liner and set aside for later
Rotate model so the seam is facing down
Spray liner with glue to help adhere the plastic - rotate the model so the seam is facing
down
18. When aligning the Oklahoma joints, where should the ankle joint axis be located on
the plaster model?
