Orthotic ABC Exam Practice Questions
Correct answers latest update
How far should the HALO ring be above the ears and eyebrows?
1 cm
On a HALO, do the headblocks go above or below the ring?
Above
On a pedatric HALO how much torque should be used on the pins?
1 in/lb per year
On an adult HALO how much torque should be used on the pins?
8 in*lbs, 6 for older or osteoporotic
On a HALO how how much torque should be used on the superstructure?
30 inlbs
The functions of the tibialis posterior muscle are:
Plantar flexion and inversion
The distal aspect of the tibia articulated with the:
talus and fibula
Anterior compression fracture of the spine involves which column(s)
Anterior Column
Where does the adductor magnus insert?
adductor tubercle
At initial contact the body weight line is where in relation to the knee and ankle?
posterior to the ankle and posterior to the knee
The congenital abnormality of the spine in which one side of the vertebra is incompletely developed
is:
Hemivertebra
,The C-Bar on a hand orthosis acts as a :
Thumb adduction stop
What double adjustable configuration should be used for a pt with Fair (2/5) plantar flexion strength,
and good (4/5) dorsiflexion strength?
Anterior Pins and Posterior Springs
In an AFO, trimming the footplate proximal to the met heads will MOST effect which rocker?
the third rocker
The Primary goal of a corrective scoliosis orthosis in the treatment of moderate adolescent idiopathic
scoliosis is:
to prevent progression of the curve
The patient is experiencing recurrent positional posterior dislocation after hip replacement surgery.
The Primary goal of a hip abduction orthosis is to block what?
Hip flexion
When fabricating a thermoplastic articulated AFO, the mechanical ankle joints should be placed at the
level of the:
Distal border of the medial maleolus
The standard lateral inferior trimline for a single piece anterior opening custom LSO is:
2 cm or 3/4 inch superior to the greater trochanter
While fitting a ground reaction AFO you observe good control of the patients knee in the agittel place
however the patient complains they are having difficulty initiating swing on the side with the orthosis.
The most appropriate modification would be :
Add a 1/4 inch heel wedge underneath the AFO
The main functional goal of a posterior off-set unlocked knee joint is to:
Provide increased stability during stance (this is a better answer than to prevent buckling at initial
contact)
During the casting of an ambulatory child with CP for custom bilateral solid ankle AFOs you note that
the right side lacks dorsiflexion range of motion (-5 degrees) with the knee extended. The MOST
appropriate way to address this is:
, Cast in -5 degrees of dorsiflexion and plan to add an external heel wedge.
At a follow up visit for a patient who was fit with bilateral solid ankle AFOs, you note redness at the
navicular on the right side. What modifications should you make to the AFO?
Add an ST pad and padding just superior to the medial maleolus
A patient was fit with a pair of custom semi-rigid orthoses two weeks ago. They are now complaining
of discomfort on the plantar aspect of their feet, just proximal to the 1st met heads. The MOST likely
cause of this problem is what?
Lack of relief for the flexor hallicus longus tendon.
A patient with positional plagiocephaly has been wearing a custom cranial remolding orthosis for the
past 8 months. The patient is not 15 months old and has outgornw the orthosis. The practitioner
should expect the physician will:
Discontinue orthotic treatment since the childs head growth has plateaued.
You are seeing a patient who has recently relocated to the area. They are currently wearing a
Cruciform Anterior Stabilization Hyperextension(CASH) orthosis. The patient states they cannot
tolerate the orthosis due to pressure on an ostomy which is located at the midline of the abdomen,
superior to the umbillicus. What is the best option to address this problem?
Suggest switchin to a Jewett style orthosis.
After providing a device to a Medicare beneficiary, the practitioner must provide any adjustments or
repairs without charge for how long?
90 Days
The rules relating to the safe use of potentially hazardous materials in the fabrication of orthoses are
under the jurisdiction of what organization?
Occupational Safety and Health Administration (OSHA)
Infection control practices used to prevent transmission of diseases that can be acquired by contact
with blood, bodily fluids, non-intact akin and mucous membranes are referred to as:
Standard Precautions
If the practitioners facility is designated as a participating supplier, this means that:
You must accept the Medicare allowable amount as payment in full.
The muscle that has the PRIMARY responsibility of rotating the thumb to touch the tips of the index
and middle fingers is the :
Correct answers latest update
How far should the HALO ring be above the ears and eyebrows?
1 cm
On a HALO, do the headblocks go above or below the ring?
Above
On a pedatric HALO how much torque should be used on the pins?
1 in/lb per year
On an adult HALO how much torque should be used on the pins?
8 in*lbs, 6 for older or osteoporotic
On a HALO how how much torque should be used on the superstructure?
30 inlbs
The functions of the tibialis posterior muscle are:
Plantar flexion and inversion
The distal aspect of the tibia articulated with the:
talus and fibula
Anterior compression fracture of the spine involves which column(s)
Anterior Column
Where does the adductor magnus insert?
adductor tubercle
At initial contact the body weight line is where in relation to the knee and ankle?
posterior to the ankle and posterior to the knee
The congenital abnormality of the spine in which one side of the vertebra is incompletely developed
is:
Hemivertebra
,The C-Bar on a hand orthosis acts as a :
Thumb adduction stop
What double adjustable configuration should be used for a pt with Fair (2/5) plantar flexion strength,
and good (4/5) dorsiflexion strength?
Anterior Pins and Posterior Springs
In an AFO, trimming the footplate proximal to the met heads will MOST effect which rocker?
the third rocker
The Primary goal of a corrective scoliosis orthosis in the treatment of moderate adolescent idiopathic
scoliosis is:
to prevent progression of the curve
The patient is experiencing recurrent positional posterior dislocation after hip replacement surgery.
The Primary goal of a hip abduction orthosis is to block what?
Hip flexion
When fabricating a thermoplastic articulated AFO, the mechanical ankle joints should be placed at the
level of the:
Distal border of the medial maleolus
The standard lateral inferior trimline for a single piece anterior opening custom LSO is:
2 cm or 3/4 inch superior to the greater trochanter
While fitting a ground reaction AFO you observe good control of the patients knee in the agittel place
however the patient complains they are having difficulty initiating swing on the side with the orthosis.
The most appropriate modification would be :
Add a 1/4 inch heel wedge underneath the AFO
The main functional goal of a posterior off-set unlocked knee joint is to:
Provide increased stability during stance (this is a better answer than to prevent buckling at initial
contact)
During the casting of an ambulatory child with CP for custom bilateral solid ankle AFOs you note that
the right side lacks dorsiflexion range of motion (-5 degrees) with the knee extended. The MOST
appropriate way to address this is:
, Cast in -5 degrees of dorsiflexion and plan to add an external heel wedge.
At a follow up visit for a patient who was fit with bilateral solid ankle AFOs, you note redness at the
navicular on the right side. What modifications should you make to the AFO?
Add an ST pad and padding just superior to the medial maleolus
A patient was fit with a pair of custom semi-rigid orthoses two weeks ago. They are now complaining
of discomfort on the plantar aspect of their feet, just proximal to the 1st met heads. The MOST likely
cause of this problem is what?
Lack of relief for the flexor hallicus longus tendon.
A patient with positional plagiocephaly has been wearing a custom cranial remolding orthosis for the
past 8 months. The patient is not 15 months old and has outgornw the orthosis. The practitioner
should expect the physician will:
Discontinue orthotic treatment since the childs head growth has plateaued.
You are seeing a patient who has recently relocated to the area. They are currently wearing a
Cruciform Anterior Stabilization Hyperextension(CASH) orthosis. The patient states they cannot
tolerate the orthosis due to pressure on an ostomy which is located at the midline of the abdomen,
superior to the umbillicus. What is the best option to address this problem?
Suggest switchin to a Jewett style orthosis.
After providing a device to a Medicare beneficiary, the practitioner must provide any adjustments or
repairs without charge for how long?
90 Days
The rules relating to the safe use of potentially hazardous materials in the fabrication of orthoses are
under the jurisdiction of what organization?
Occupational Safety and Health Administration (OSHA)
Infection control practices used to prevent transmission of diseases that can be acquired by contact
with blood, bodily fluids, non-intact akin and mucous membranes are referred to as:
Standard Precautions
If the practitioners facility is designated as a participating supplier, this means that:
You must accept the Medicare allowable amount as payment in full.
The muscle that has the PRIMARY responsibility of rotating the thumb to touch the tips of the index
and middle fingers is the :
