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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What is the access shape for a maxillary 1st molar with 4 canals?

Square
Blunted triangle or rhomboidal
Trapezoid
Oval

The correct answer is: Blunted triangle or rhomboidal

The blunted triangle or rhomboidal shape is the appropriate access shape for a maxillary first molar with four canals because it allows for better visualization and accessibility to the canal orifices. Square and oval shapes are not as effective as they may not accurately correspond to the actual canal anatomy, whereas the trapezoid shape may not provide enough space for proper intervention. Blunted triangle or rhomboidal shape also ensures proper disinfection and shaping of the canals, leading to better treatment outcomes.