CPT Materials, Tools, & Safety in Prosthetics 4

Question 1

A prosthetic technician develops a skin rash after repeated contact with uncured epoxy. What is the MOST appropriate corrective action?

Accepted Answer

Use nitrile gloves and barrier cream; consult occupational health

Answer

Switch to a slower-curing epoxy formulation

Answer

Apply topical antibiotic and continue working

Answer

Reduce resin mixing time to limit exposure

Question 2

Which fastener type is preferred when attaching metal components to carbon fiber sockets to prevent galvanic corrosion?

Accepted Answer

Titanium or stainless steel fasteners with isolating washers

Answer

Standard carbon steel bolts

Answer

Aluminum rivets

Answer

Zinc-plated steel screws

Question 3

What is the primary purpose of applying a release agent to a positive mold before lamination?

Accepted Answer

To prevent the lamination from permanently bonding to the mold

Answer

To improve resin penetration into the fiber layers

Answer

To accelerate the curing process

Answer

To add color to the finished socket

Question 4

When using a heat gun to spot-modify a polypropylene socket, holding the gun too close primarily risks which outcome?

Accepted Answer

Scorching or burning the polymer

Answer

Cracking due to rapid cooling

Answer

Creating residual stress in unaffected areas

Answer

Reducing the socket's translucency

Question 5

Which standard does the FDA reference for testing the biocompatibility of materials used in direct skin contact prosthetic components?

Accepted Answer

ISO 10993

Answer

ASTM F2213

Answer

ISO 13485

Answer

ANSI/AAMI ES60601

Question 6

In a lamination vacuum bag setup, what is the function of the bleeder cloth layer?

Accepted Answer

To absorb excess resin and allow uniform vacuum pressure distribution

Answer

To provide structural reinforcement to the laminate

Answer

To prevent resin from reaching the vacuum pump

Answer

To add color pigment throughout the laminate

Question 7

A grinding wheel shows visible cracks before use. The correct action is to:

Accepted Answer

Tag it out of service and replace it immediately

Answer

Use it at half speed to complete the current task

Answer

Apply adhesive to the crack and allow to cure before use

Answer

Run it briefly without load to check if the crack propagates