Orthotics CPM Exam Study Guide with Complete
Solutions
What is the reasoning behind using non-ferrous components in halo systems? - MRI
compatible
What is the recommended torque for halo pins in adults, and in children? - Adults - 8-
inch pounds Children - 4-6 inch pounds
What is the RX rational for a rocker bottom shoe. - Simulate normal foot biomechanics
and promote even weight bearing distribution in a patient with limited or no ankle motion
What is tibial torsion? - Difference between knee and ankle joint axes as viewed in the
transverse plane
What is torticollis? - Contracture of the sternocleidomastoid muscle
What is your orthotic recommendation for a patient with an odontoid fracture who was
just removed from a halo? - -SOMI
-Minerva brace -Extended philli
What is your orthotic recommendation for a rotator cuff injury? - Immobilize shoulder in
slight abduction - airplane splint
What is your orthotic recommendation for chondromalacia? - patellar stabilizing knee
brace
What is your orthotic recommendation for the above patient with a C6 cervical lesion? -
Wrist driven flexor hinge orthosis (WD-WHO)
What modifications can you make to a plastic KAFO to reduce recurvatum? - Increase
heel height, offset knee joints, trim proximal and distal sections closer to knee, pad
shells, shallow shells
What moment at the knee is created in stance phase of gait in a solid thermoplastic
AFO set to neutral with a rigid full length footplate? Additionally, where in stance would
be this most noticed by the patient? - increase the knee extension moment, terminal
stance
What motion and at what phase of gait does a cushioned heel simulate? - plantarflexion
at heel strike, initial contact
What muscle flexes, abducts, extends and supports the shoulder joint? - deltoid
Solutions
What is the reasoning behind using non-ferrous components in halo systems? - MRI
compatible
What is the recommended torque for halo pins in adults, and in children? - Adults - 8-
inch pounds Children - 4-6 inch pounds
What is the RX rational for a rocker bottom shoe. - Simulate normal foot biomechanics
and promote even weight bearing distribution in a patient with limited or no ankle motion
What is tibial torsion? - Difference between knee and ankle joint axes as viewed in the
transverse plane
What is torticollis? - Contracture of the sternocleidomastoid muscle
What is your orthotic recommendation for a patient with an odontoid fracture who was
just removed from a halo? - -SOMI
-Minerva brace -Extended philli
What is your orthotic recommendation for a rotator cuff injury? - Immobilize shoulder in
slight abduction - airplane splint
What is your orthotic recommendation for chondromalacia? - patellar stabilizing knee
brace
What is your orthotic recommendation for the above patient with a C6 cervical lesion? -
Wrist driven flexor hinge orthosis (WD-WHO)
What modifications can you make to a plastic KAFO to reduce recurvatum? - Increase
heel height, offset knee joints, trim proximal and distal sections closer to knee, pad
shells, shallow shells
What moment at the knee is created in stance phase of gait in a solid thermoplastic
AFO set to neutral with a rigid full length footplate? Additionally, where in stance would
be this most noticed by the patient? - increase the knee extension moment, terminal
stance
What motion and at what phase of gait does a cushioned heel simulate? - plantarflexion
at heel strike, initial contact
What muscle flexes, abducts, extends and supports the shoulder joint? - deltoid
