OTC Orthopaedic Technologist Certified Orthopaedic Appliances and Bracing 5

Question 1

A hinged AFO with a plantarflexion stop is indicated primarily for patients who demonstrate which gait deviation?

Accepted Answer

Knee hyperextension secondary to spastic plantarflexion

Answer

A plantarflexion stop prevents the ankle from dropping into equinus during initial contact, which eliminates the extensor thrust that causes knee hyperextension.

Question 2

Which padding technique is used inside a cast specifically to protect the fibular head from pressure injury?

Accepted Answer

Donut pad centered over the fibular head

Answer

A donut pad (ring pad) distributes pressure away from the prominent fibular head by surrounding it, preventing focal pressure and peroneal nerve injury.

Question 3

The Sarmiento functional fracture brace for humeral shaft fractures relies on which primary mechanism to maintain fracture alignment?

Accepted Answer

Soft tissue hydraulic compression and gravity-assisted alignment

Answer

The Sarmiento humeral brace uses hydrostatic pressure from the surrounding soft tissue envelope combined with gravitational alignment to maintain fracture reduction without immobilizing the joints.

Question 4

When selecting a prefabricated versus custom-fabricated orthosis, which patient factor most strongly justifies the custom option?

Accepted Answer

Significant anatomical deformity or limb asymmetry

Answer

Significant anatomical deformity or asymmetry prevents prefabricated orthoses from achieving adequate fit, necessitating custom fabrication to the patient's specific contours.

Question 5

A patient with C5 spinal cord injury requires upper extremity orthotic support. Which orthosis would best enable functional hand use by harnessing wrist extension power?

Accepted Answer

Wrist-driven flexor hinge orthosis (tenodesis orthosis)

Answer

A wrist-driven flexor hinge orthosis converts active wrist extension into passive finger pinch through a mechanical linkage, exploiting the preserved C5-C6 wrist extension in these patients.

Orthopaedic Technologist Certified Test Practice Test

Orthopaedic Technologist Certified Test Practice Test

OTC Orthopaedic Technologist Certified Orthopaedic Appliances and Bracing 5