Endodontics: 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 · Endodontics

Sample item

What is the purpose of root-canal obturation?

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

The answer and the reasoning

D. Seal cleaned canal to prevent reinfection

After cleaning and shaping, obturation seals the root-canal system to limit bacterial re-entry and support healing of periapical tissues.

Option by option

  • A. Whiten enamel permanently

    Whitening is a separate cosmetic procedure.

  • B. Remove calculus from root surface

    Calculus removal is periodontal therapy.

  • C. Move tooth orthodontically

    Orthodontics moves teeth through bone.

  • D. Seal cleaned canal to prevent reinfection (correct)

    Correct: sealing prevents recurrent canal contamination.

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 D, Seal cleaned canal to prevent reinfection. After cleaning and shaping, obturation seals the root-canal system to limit bacterial re-entry and support healing of periapical tissues.

Why is "Whiten enamel permanently" not the answer?

Whitening is a separate cosmetic procedure.

Why is "Remove calculus from root surface" not the answer?

Calculus removal is periodontal therapy.

Why is "Move tooth orthodontically" not the answer?

Orthodontics moves teeth through bone.

What concept does this question test?

It tests Endodontics in Dentistry. The correct option holds because: Correct: sealing prevents recurrent canal contamination.

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 Endodontics?

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.