National Dental Examining Board of Canada (NDEB) 2025 – 400 Free Practice Questions to Pass the Exam

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Question: 1 / 265

Which substance should not be used to disinfect gutta-percha cones due to its composition?

Chlorhexidine gluconate

5.25% sodium hypochlorite

Distilled water

Ethanol

Ethanol should not be used to disinfect gutta-percha cones due to its composition. Ethanol is an organic solvent and can dissolve or damage the gutta-percha material. It is better to use chemical disinfectants such as chlorhexidine gluconate or sodium hypochlorite, or simply distilled water for cleaning and disinfecting gutta-percha cones.

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