Local anesthesia: aspiration: 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: aspiration

Sample item

Why is aspiration performed before depositing local anesthetic near a major vessel?

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

The answer and the reasoning

B. Reduce risk of inadvertent intravascular injection

Aspiration checks whether the needle tip is within a blood vessel before anesthetic is injected. Combined with incremental injection, it reduces systemic toxicity and intravascular adrenaline effects.

Option by option

  • A. Increase pulp sensitivity

    Local anesthetic reduces, not increases, pulp sensitivity.

  • B. Reduce risk of inadvertent intravascular injection (correct)

    Correct. A negative aspiration lowers likelihood of vascular injection.

  • C. Make the anesthetic act more slowly

    Aspiration does not determine onset speed.

  • D. Sterilize the injection site

    Skin and mucosal antisepsis is performed separately.

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, Reduce risk of inadvertent intravascular injection. Aspiration checks whether the needle tip is within a blood vessel before anesthetic is injected.

Why is "Increase pulp sensitivity" not the answer?

Local anesthetic reduces, not increases, pulp sensitivity.

Why is "Make the anesthetic act more slowly" not the answer?

Aspiration does not determine onset speed.

Why is "Sterilize the injection site" not the answer?

Skin and mucosal antisepsis is performed separately.

What concept does this question test?

It tests Local anesthesia: aspiration in Dentistry. Combined with incremental injection, it reduces systemic toxicity and intravascular adrenaline effects.

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: aspiration?

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.