CTO Upper Extremity Orthotics 3

Question 1

A mallet finger orthosis must position the DIP joint in which position to allow terminal tendon healing?

Accepted Answer

Full extension or slight hyperextension

Answer

10–15 degrees of flexion

Answer

30 degrees of flexion

Answer

Neutral (0 degrees) with freedom to flex

Question 2

Low-temperature thermoplastic materials commonly used for hand and wrist orthoses typically become moldable at which temperature range?

Accepted Answer

60–70°C (140–158°F)

Answer

45–50°C (113–122°F)

Answer

85–95°C (185–203°F)

Answer

100°C (212°F)

Question 3

In ulnar nerve palsy at the elbow, which fingers demonstrate the most pronounced intrinsic minus (claw) deformity?

Accepted Answer

Ring and little fingers

Answer

Index and middle fingers

Answer

Middle and ring fingers

Answer

All four fingers equally

Question 4

The 'safe position' (intrinsic plus position) used when immobilizing a hand places the MCP joints at approximately how many degrees of flexion?

Accepted Answer

45–70 degrees

Answer

0–10 degrees

Answer

20–30 degrees

Answer

90 degrees

Question 5

A shoulder abduction (airplane) orthosis is most commonly indicated following:

Accepted Answer

Brachial plexus injury or axillary nerve damage

Answer

Carpal tunnel release surgery

Answer

Distal radius fracture

Answer

Rotator cuff tendinopathy

Question 6

When evaluating fit of a hand-based thumb CMC orthosis, the technician should confirm that:

Accepted Answer

The IP joint of the thumb remains free to flex if not included in the design intent

Answer

The device extends at least two-thirds up the forearm

Answer

The wrist is immobilized in 30 degrees of extension

Answer

The orthosis reaches to the fingertips of the index finger

Question 7

Serial static orthoses used to reduce an elbow flexion contracture are typically remolded or adjusted at what frequency?

Accepted Answer

Every 3–7 days

Answer

Every 24 hours

Answer

Every 2 weeks

Answer

Monthly