Oral histology and anatomy: pulp blood supply: practice question

A Dentistry question in the style of the NEET PG paper. Answer it first, then read why the right option is right and why each of the others is wrong.

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Dentistry · Oral histology and anatomy: pulp blood supply

Sample item

A tooth is struck and the pulp becomes necrotic although the crown looks intact. Through which opening do the main vessels and nerves enter the pulp, making it vulnerable to this injury?

Original practice item, not a recalled exam question. Nothing here is recorded.

The answer and the reasoning

C. Apical foramen

The main neurovascular bundle enters through the apical foramen, with small contributions via accessory canals. A blow that severs this supply can cause ischaemic pulp necrosis without visible crown damage.

Option by option

  • A. Cemento-enamel junction

    The cemento-enamel junction is a surface landmark and has no vascular opening.

  • B. Dentinal tubules

    Tubules carry odontoblast processes and fluid, not the main vessels.

  • C. Apical foramen (correct)

    Correct. The apical foramen is the principal portal for pulp vessels and nerves.

  • D. Gingival sulcus

    The sulcus is a gingival space and not a route into the pulp.

Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.

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Questions about this Dentistry question

What is the answer to this Dentistry question?

The best answer is C, Apical foramen. The main neurovascular bundle enters through the apical foramen, with small contributions via accessory canals.

Why is "Cemento-enamel junction" not the answer?

The cemento-enamel junction is a surface landmark and has no vascular opening.

Why is "Dentinal tubules" not the answer?

Tubules carry odontoblast processes and fluid, not the main vessels.

Why is "Gingival sulcus" not the answer?

The sulcus is a gingival space and not a route into the pulp.

What concept does this question test?

It tests Oral histology and anatomy: pulp blood supply in Dentistry. A blow that severs this supply can cause ischaemic pulp necrosis without visible crown damage.

How hard is this question?

We tag it as an application question: it asks you to use a fact on a patient or a finding. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

How should I study Oral histology and anatomy: pulp blood supply?

Learn the dental formula, eruption ages and tooth structure once, as tables. Then use the flashcards and the other Dentistry questions on this site to test what stuck.

Is this a real NEET PG question?

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.