CPT Materials, Tools, & Safety in Prosthetics 1 — Questions and Answers

Question 1: Which material is most commonly used for creating a rigid prosthetic socket?

Polyethylene
Polypropylene
Epoxy resin (Correct answer)
Silicone

Correct answer: Epoxy resin

Epoxy resin is commonly used for creating rigid prosthetic sockets due to its excellent strength-to-weight ratio, durability, and ability to be molded precisely. It provides the necessary structural integrity and stiffness to support the patient's limb and transfer forces effectively during ambulation.

Question 2: What is the purpose of using a cast saw in prosthetic fabrication?

To polish the socket
To apply lamination
To cut and trim cast materials (Correct answer)
To bond components

Correct answer: To cut and trim cast materials

A cast saw is a specialized tool used in prosthetic fabrication to safely and precisely cut and trim plaster or fiberglass cast materials. This is crucial during the initial stages of creating a mold from the patient's residual limb, allowing for accurate shaping and removal of excess material.

Question 3: Which personal protective equipment (PPE) is most important when working with volatile adhesives?

Safety gloves
Protective goggles
Respirator mask (Correct answer)
Apron

Correct answer: Respirator mask

When working with volatile adhesives, which often release harmful fumes and organic vapors, a respirator mask is the most critical piece of PPE. It protects the technician's respiratory system from inhaling these toxic substances, preventing potential health issues like dizziness, nausea, or long-term respiratory damage.

Question 4: What tool is used to smooth edges and surfaces of plastic sockets?

Drill press
Heat gun
Bench sander (Correct answer)
Vacuum pump

Correct answer: Bench sander

A bench sander is a fundamental tool in prosthetic fabrication used to smooth and refine the edges and surfaces of plastic sockets and other components. It allows technicians to remove rough spots, achieve precise contours, and ensure a comfortable, irritation-free fit for the patient.

Question 5: Why is silicone frequently used in prosthetic liners?

It's the cheapest option
It creates a rigid structure
It improves shock absorption and comfort (Correct answer)
It helps with lamination

Correct answer: It improves shock absorption and comfort

Silicone is frequently used in prosthetic liners because its viscoelastic properties allow it to effectively absorb shock and distribute pressure. This material conforms well to the residual limb, providing a soft, cushioning interface that significantly enhances comfort and reduces skin irritation for the user during daily activities.

Question 6: Which practice best ensures technician safety in the prosthetics lab?

Avoid using PPE for better comfort
Open windows during lamination
Use PPE and follow lab protocols (Correct answer)
Skip gloves for better grip

Correct answer: Use PPE and follow lab protocols

Using Personal Protective Equipment (PPE) such as gloves, safety glasses, and respirators is crucial for protecting technicians from hazardous materials like resins, dust, and fumes common in a prosthetics lab. Adhering to established lab protocols ensures safe handling of tools, machinery, and chemicals, minimizing the risk of accidents and exposure to harmful substances.

CPT Materials, Tools, & Safety in Prosthetics 1

Which material is most commonly used for creating a rigid prosthetic socket?