CCA CCA Infection Control & Sterilization 1 — Questions and Answers
Question 1: What is the recommended method for disinfecting silicone facial prostheses?
- Autoclaving at 134°C
- Wiping with isopropyl alcohol and air drying (Correct answer)
- Immersion in glutaraldehyde for 10 hours
- UV light exposure for 30 minutes
Correct answer: Wiping with isopropyl alcohol and air drying
Silicone prostheses cannot withstand autoclaving temperatures, so isopropyl alcohol wipe-down is the standard disinfection method.
Question 2: Which disinfectant is classified as high-level and approved for use on prosthetic impression materials that cannot be autoclaved?
- Soap and water
- 70% isopropyl alcohol
- 2% glutaraldehyde solution (Correct answer)
- 3% hydrogen peroxide
Correct answer: 2% glutaraldehyde solution
2% glutaraldehyde is a high-level disinfectant effective against all microorganisms except high numbers of bacterial spores, making it suitable for heat-sensitive impression materials.
Question 3: What is the primary purpose of barrier precautions during prosthetic fabrication?
- To protect the prosthesis from dust contamination
- To prevent cross-contamination between patient and practitioner (Correct answer)
- To maintain color accuracy of silicone materials
- To improve adhesion of extrinsic colorants
Correct answer: To prevent cross-contamination between patient and practitioner
Barrier precautions (gloves, masks, gowns) prevent cross-contamination and protect both patient and clinician from infectious agents.
Question 4: How should impressions be handled before pouring stone models in the anaplastology lab?
- Disinfected with an appropriate disinfectant spray or immersion (Correct answer)
- Rinsed with tap water only
- Stored dry for 24 hours before use
- Immediately poured without any treatment
Correct answer: Disinfected with an appropriate disinfectant spray or immersion
Impressions must be disinfected before laboratory handling to prevent pathogen transmission to the lab environment, per CDC guidelines.
Question 5: Which infection control standard applies to ALL patients regardless of known infection status in anaplastology practice?
- Contact precautions
- Transmission-based precautions
- Standard precautions (Correct answer)
- Droplet precautions
Correct answer: Standard precautions
Standard precautions apply universally to all patients regardless of diagnosis and form the foundation of infection control in healthcare.
Question 6: What is the correct procedure for disposing of contaminated impression materials in a clinical anaplastology setting?
- Rinse, disinfect, and double-bag before disposal (Correct answer)
- Place directly in regular trash
- Return to manufacturer for disposal
- Store in a sharps container
Correct answer: Rinse, disinfect, and double-bag before disposal
Contaminated impression materials are biohazardous waste and must be rinsed, disinfected, and double-bagged per OSHA regulations.
CCA CCA Infection Control & Sterilization 1
What is the recommended method for disinfecting silicone facial prostheses?