Impression Disinfection Protocol — NDEB AFK MCQ
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Correct answer: E — Rinse under running water, disinfect with appropriate agent (spray or immersion) for the recommended time, then pour promptly according to material requirements
Dental impressions become contaminated with patient saliva, blood, and debris. Proper infection control handling: (1) rinse under running water to remove saliva and blood; (2) disinfect with an appropriate agent — spray or immersion disinfection (e.g., 2% glutaraldehyde, sodium hypochlorite, iodophor) for the manufacturer-recommended time (varies by material: alginate 10 min immersion max; PVS/polyether can tolerate longer immersion); (3) rinse again; (4) pour according to material timing requirements. Over-immersion can cause dimensional changes, especially in hydrocolloid materials.
Reference: CDC – Infection Control in Dental Settings, 2003; CDA Infection Control Guidelines