Local anesthesia: 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 · Local anesthesia

Sample item

Why is aspiration performed before depositing local anesthetic for certain dental nerve blocks?

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

The answer and the reasoning

B. To reduce the chance of intravascular injection

Aspiration checks whether the needle tip may be within a blood vessel before anesthetic is injected, reducing the risk of unintended intravascular delivery and systemic adverse effects.

Option by option

  • A. To measure periodontal pocket depth

    Pocket depth is measured with a periodontal probe.

  • B. To reduce the chance of intravascular injection (correct)

    Correct: aspiration helps avoid accidental intravascular anesthetic injection.

  • C. To whiten the tooth surface

    Needle aspiration has no whitening function.

  • D. To sterilize the needle after use

    Aspiration does not sterilize an already used needle.

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 B, To reduce the chance of intravascular injection. Aspiration checks whether the needle tip may be within a blood vessel before anesthetic is injected, reducing the risk of unintended intravascular delivery and systemic adverse effects.

Why is "To measure periodontal pocket depth" not the answer?

Pocket depth is measured with a periodontal probe.

Why is "To whiten the tooth surface" not the answer?

Needle aspiration has no whitening function.

Why is "To sterilize the needle after use" not the answer?

Aspiration does not sterilize an already used needle.

What concept does this question test?

It tests Local anesthesia in Dentistry. The correct option holds because: Correct: aspiration helps avoid accidental intravascular anesthetic injection.

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 Local anesthesia?

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.