National Dental Examining Board of Canada (NDEB) Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

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.

Start Multiple Choice Practice Test
Start Flash Cards

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 area of the tooth is most sensitive during cavity preparation?

  1. Pulpal floor

  2. DEJ

  3. Gingival margin

  4. Occlusal surface

The correct answer is: DEJ

During cavity preparation, the dentist removes decayed material from the tooth. The DEJ (dental enamel junction) is the area where the enamel and dentin of the tooth meet. This area is the most sensitive to pain and discomfort during cavity preparation because it is where the nerves and blood vessels responsible for sensation are located. Option A, the pulpal floor, is the area at the bottom of the cavity that is closest to the nerves and blood vessels in the pulp of the tooth. While it can also be sensitive, it is not the most sensitive area during cavity preparation. Option C, the gingival margin, is the area where the tooth meets the gumline. It is also an important area to protect during cavity preparation, but it is not the most sensitive area. Option D, the occlusal surface, is the chewing surface of the tooth. While it may also be

More Questions Like This