Infection Control · single question
How should an alginate impression be disinfected before sending to the laboratory?
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Correct answer: D. Rinse with water, spray with hypochlorite, seal in bag with damp towel
Correct procedure: rinse with water, spray with hypochlorite, place in a sealed bag with a damp paper towel. Soaking causes imbibition distortion; autoclaving destroys the impression.
- A. ❌ Soaking causes imbibition and permanent dimensional distortion.
- B. ❌ Autoclaving destroys alginate impressions.
- C. ❌ Water rinse alone is insufficient for disinfection.
- D. ✅ CORRECT – Rinse, spray with disinfectant, seal with damp towel. ADA/CDC recommended method.
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