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 mandibular 1st molar with 3 canals?

Square
Circle
Trapezoid
Oval

The correct answer is: Trapezoid

A square shape would not be possible as a molar has three roots, which would not fit into a square shape. A circle shape would not be possible as a molar has three roots, which would not fit into a circle shape. An oval shape would not be possible as a molar has three roots, which would not fit into an oval shape. The access shape used for a mandibular first molar with three canals is typically a trapezoid. This shape allows for proper visualization and access to all three canals, which are located in slightly different angles within the tooth.