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ORTHOTICS CPM EXAM S TUDY
GUIDE WITH COMPLETE
SOLUTIONS
Question 1: Describe 3-point pressure system for Ground
Reaction AFO.
CORRECT ANSWER: 1. Posterior directed force at
tibial plateau, 2. Superior directed force at plantar aspect of calcaneus, 3. Superior directed force at plantar aspect of footplate and toes
Question 2: Which structures are targeted when testing
the knee for CORONAL plane stability?
CORRECT ANSWER: Medial Collateral Ligament
(MCL) and Lateral Collateral Ligament (LCL)
Question 3: Name one accessory often used with a free-
motion AFO joint selection.
CORRECT ANSWER: T-strap for valgus or varus
control
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Question 4: Which AFO variety would you recommend
for a patient with Fair/Zero anterior and posterior compartments and ankle joint pain?
CORRECT ANSWER: Solid ankle - set in desired
flexion angle (Rocker bottom sole helpful)
Question 5: How would you configure your double action
ankle joints to provide swing phase clearance and to minimize foot slap at initial contact?
CORRECT ANSWER: Dorsiflexion assist - Spring
posterior, free anterior
Question 6: Which vertebrae is affected in a Jefferson's
fracture? What is the treatment?
CORRECT ANSWER: 1. C1 fracture, 2. HALO
Question 7: Name 3 goals for idiopathic scoliosis
treatment.
CORRECT ANSWER: 1. Achieve spinal balance, 2.
Prevent curve progression, 3. Reduce curve in-brace by at least 50%
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Question 8: Which curve of a double spinal curve is more
flexible?
CORRECT ANSWER: Minor curve
Question 9: How would you test for "Normal" muscle
strength for: Tibialis Posterior?
CORRECT ANSWER: -Pt is side lying on test side with
foot off table, -Stabilize lower leg proximal to the ankle, - Pt inverts the foot through full ROM with slight plantarflexion, -Apply resistance on the medial border of the forefoot
Question 10: How would you test for "Normal" muscle
strength for: Tibialis Anterior?
CORRECT ANSWER: -Pt is sitting, ankle is in
plantarflexion, -Support the lower leg and stabilize proximal to the ankle, -Pt dorsiflexes and inverts foot through full ROM (keeping toes relaxed), -Apply resistance on the dorso-medial aspect of the forefoot
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Question 11: What are the normal accepted ROM for
calcaneal inversion and eversion?
CORRECT ANSWER: 10-20 degrees eversion, 20-30
degrees inversion
Question 12: How would you test for "Normal" muscle
strength for: Soleus?
CORRECT ANSWER: -Pt is prone with feet off table, -
Test knee is flexed to at least 45 degrees, -Stabilize proximal to the ankle, -Pt plantar flexes through full ROM, -Apply resistance to posterior calcaneus to dorsiflex the ankle
Question 13: What modifications could you make on an
AFO for a flexible VARUS deformity? (2)
CORRECT ANSWER: 1. Add a lateral "tab" just
proximal to the malleolus (aka Sabolich mod), 2. Extend medial footplate trimline to encompass the 1st met head
Question 14: Describe 3-point pressure system on UCBL
for pes VALGUS/pronation?
