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!

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The mandibular first molar should be prepared by orienting the bur parallel to the long axis of the?

Crown
Root
Pulp chamber
Buccal surface

The correct answer is: Crown

When preparing the mandibular first molar, it is essential to orient the bur parallel to the long axis of the crown. This approach helps ensure that the final restoration will have proper occlusion, function, and longevity. Orienting the bur parallel to the long axis of the root or the pulp chamber may lead to inadequate preparation or damage to the tooth structure. Similarly, orienting the bur parallel to the buccal surface may result in a restoration that is not properly aligned with the occlusal plane. Therefore, it is crucial to focus on the long axis of the crown when preparing the mandibular first molar.