National Dental Examining Board of Canada (NDEB) Practice Exam

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Master your National Dental Examining Board of Canada (NDEB) exams with our comprehensive practice guide. Achieve excellence in your dental certification with expertly crafted questions and detailed explanations.

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

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

Chlorhexidine gluconate
5.25% sodium hypochlorite
Distilled water
Ethanol

The correct answer is: 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.