CTO Upper Extremity Orthotics

Question 1

What is the primary purpose of a wrist cock-up orthosis?

Accepted Answer

To stabilize the wrist in extension while allowing finger movement

Answer

To provide dynamic assistance to finger flexion

Answer

To immobilize the entire hand and wrist in a resting position

Answer

To facilitate elbow flexion during activities of daily living

Question 2

In a standard resting hand orthosis, what is the recommended wrist position?

Accepted Answer

10–20 degrees of extension

Answer

0 degrees (neutral)

Answer

30–40 degrees of extension

Answer

10–15 degrees of flexion

Question 3

Boutonnière deformity is characterized by which combination of joint positions?

Accepted Answer

PIP joint flexion and DIP joint hyperextension

Answer

PIP joint hyperextension and DIP joint flexion

Answer

MCP joint flexion and PIP joint extension

Answer

Wrist flexion and MCP joint hyperextension

Question 4

Which nerve injury would most likely require a low-profile dynamic MCP extension orthosis?

Accepted Answer

Radial nerve injury at the spiral groove

Answer

Median nerve injury at the wrist

Answer

Ulnar nerve injury at the elbow

Answer

Brachial plexus upper trunk injury

Question 5

A thumb spica orthosis is a primary conservative treatment for which condition?

Accepted Answer

De Quervain's tenosynovitis

Answer

Carpal tunnel syndrome

Answer

Dupuytren's contracture

Answer

Trigger finger

Question 6

The Kleinert protocol for flexor tendon repair uses which type of orthosis?

Accepted Answer

Dorsal blocking orthosis with rubber band traction

Answer

Static wrist extension orthosis

Answer

Static progressive flexion cast

Answer

Functional electrical stimulation orthosis

Question 7

Which measurement is most important when sizing a prefabricated wrist orthosis?

Accepted Answer

Wrist circumference

Answer

Hand span at the widest point

Answer

Distance from wrist crease to fingertip

Answer

Palm length from wrist crease to MCP crease