DEX MODULE 4 EXAM 2026/2027 | STUDY GUIDE, PRACTICE QUESTIONS,
ANSWERS & COMPREHENSIVE EXAM REVIEW
A patient is unable or has too much difficulty performing a single-support heel raise; his hindfoot
remains flexible. These findings on physical exam correspond to this stage if flatfoot deformity - ANS
✔✔Stage II
What is the order of screw placement in the anterior ankle fusion plate? - ANS ✔✔Talus locking/non-
locking screw fixation, tibia oblong compression hole non-locking screw fixation, anatomic compression
hole screw fixation, and final fixation with tibia locking/non-locking screws
What are components of flatfoot deformity? - ANS ✔✔- Loss of longitudinal arch
- Lateral translation of the navicular on the talus
- Valgus tilt of the calcaneus
- Shortening of the lateral column
Stage IV flatfoot deformity - ANS ✔✔
At what stage of flatfoot deformity is an ankle fusion often indicated? - ANS ✔✔Stage IV
What is the most common type of arthritis to affect the ankle joint? - ANS ✔✔Osteoarthritis
Ankle arthritis relates to what stage of flatfoot deformity? - ANS ✔✔Stage 4
In a spring ligament IB augmentation, what size sidelock anchor is best for the sustentaculum tail? - ANS
✔✔3.5mm
The intersection of what two ligaments form " The Knot of Henry"? - ANS ✔✔FHL and FDL
A cotton osteotomy is an osteotomy of which bone of the foot? - ANS ✔✔Medial cuneiform
Which fibers of the scapholunate interosseous ligament are the strongest and provide the main resistant
biomechanical role important to wrist function? - ANS ✔✔Dorsal
Surgical treatment is indicated for which of the following findings in scaphoid fractures - ANS ✔✔-
Displacement greater than 1mm
- Angulation greater than 15 degrees
- Comminuted fractures
What are the three zones of the scaphoid? - ANS ✔✔- Distal pole
- Waist
- Proximal pole
Arthrex recommends removing ____mm from the initial measurement of the k-wire to allow for
compression and countersinking when selecting the screw length to use - ANS ✔✔4mm
ANSWERS & COMPREHENSIVE EXAM REVIEW
A patient is unable or has too much difficulty performing a single-support heel raise; his hindfoot
remains flexible. These findings on physical exam correspond to this stage if flatfoot deformity - ANS
✔✔Stage II
What is the order of screw placement in the anterior ankle fusion plate? - ANS ✔✔Talus locking/non-
locking screw fixation, tibia oblong compression hole non-locking screw fixation, anatomic compression
hole screw fixation, and final fixation with tibia locking/non-locking screws
What are components of flatfoot deformity? - ANS ✔✔- Loss of longitudinal arch
- Lateral translation of the navicular on the talus
- Valgus tilt of the calcaneus
- Shortening of the lateral column
Stage IV flatfoot deformity - ANS ✔✔
At what stage of flatfoot deformity is an ankle fusion often indicated? - ANS ✔✔Stage IV
What is the most common type of arthritis to affect the ankle joint? - ANS ✔✔Osteoarthritis
Ankle arthritis relates to what stage of flatfoot deformity? - ANS ✔✔Stage 4
In a spring ligament IB augmentation, what size sidelock anchor is best for the sustentaculum tail? - ANS
✔✔3.5mm
The intersection of what two ligaments form " The Knot of Henry"? - ANS ✔✔FHL and FDL
A cotton osteotomy is an osteotomy of which bone of the foot? - ANS ✔✔Medial cuneiform
Which fibers of the scapholunate interosseous ligament are the strongest and provide the main resistant
biomechanical role important to wrist function? - ANS ✔✔Dorsal
Surgical treatment is indicated for which of the following findings in scaphoid fractures - ANS ✔✔-
Displacement greater than 1mm
- Angulation greater than 15 degrees
- Comminuted fractures
What are the three zones of the scaphoid? - ANS ✔✔- Distal pole
- Waist
- Proximal pole
Arthrex recommends removing ____mm from the initial measurement of the k-wire to allow for
compression and countersinking when selecting the screw length to use - ANS ✔✔4mm
