INBDE (Integrated National Board Dental Examination) Practice Exam

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

Ace your INBDE with our comprehensive practice exam. Featuring detailed explanations, interactive flashcards, and a wide array of multiple-choice questions designed to mirror the real test. Get ready to surpass your expectations!

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.

What is the mechanism of action for HEMA?

  1. Bonds chemically to resin

  2. Wets dentin, increases surface energy

  3. Acts as a self-etch primer

  4. Removes the smear layer

The correct answer is: Wets dentin, increases surface energy

HEMA, or 2-hydroxyethyl methacrylate, is a hydrophilic monomer commonly used in dental materials. The mechanism of action for HEMA is that it wets dentin, increasing the surface energy of the tooth structure. This improves the adhesion between the dental material and the tooth, leading to a stronger bond. Option A and D are incorrect because they refer to bonding and removing the smear layer, which are not the primary functions of HEMA. Option C is also incorrect because while HEMA can act as a self-etch primer, its main mechanism of action is still wetting dentin.

More Questions Like This