INBDE (Integrated National Board Dental Examination) Practice Exam

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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!

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!

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How deep in DEJ should retentive grooves be placed?

0.25mm
0.5mm
1mm
0.75mm

The correct answer is: 0.5mm

Retentive grooves should be placed 0.5mm into the DEJ (dentin-enamel junction). This is the optimal depth for providing retention and support for restorative materials such as dental amalgam or composite. Options A, C, and D are incorrect because they are either too shallow (A and D) or too deep (C) and may not provide adequate retention or support. It is important to be precise with the placement of retentive grooves in order to ensure optimal restorative outcomes.