Caries, pulp and periodontal disease: smoking masks gingival signs: 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 · Caries, pulp and periodontal disease: smoking masks gingival signs

Sample item

A heavy smoker has advanced radiographic bone loss but pale firm gingiva with little redness and minimal bleeding on probing. Which mechanism best explains the paucity of clinical inflammation?

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

The answer and the reasoning

C. Nicotine-induced vasoconstriction and reduced gingival blood flow

Smoking causes peripheral vasoconstriction and reduces bleeding and redness, so inflammation is masked even though attachment loss progresses faster and treatment response is poorer. Absence of bleeding therefore does not mean periodontal health in a smoker.

Option by option

  • A. Thickening of the sulcular epithelium that seals the pocket

    The sulcular lining is not thickened; the pocket remains open to bacterial plaque.

  • B. Enhanced neutrophil activity that clears plaque

    Neutrophil function is impaired in smokers, not enhanced.

  • C. Nicotine-induced vasoconstriction and reduced gingival blood flow (correct)

    Correct. Vasoconstriction hides the usual inflammatory signs while tissue destruction continues.

  • D. Increased salivary flow that washes out plaque

    Smoking does not enhance salivary clearance of plaque and is linked with more plaque, not less.

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, Nicotine-induced vasoconstriction and reduced gingival blood flow. Smoking causes peripheral vasoconstriction and reduces bleeding and redness, so inflammation is masked even though attachment loss progresses faster and treatment response is poorer.

Why is "Thickening of the sulcular epithelium that seals the pocket" not the answer?

The sulcular lining is not thickened; the pocket remains open to bacterial plaque.

Why is "Enhanced neutrophil activity that clears plaque" not the answer?

Neutrophil function is impaired in smokers, not enhanced.

Why is "Increased salivary flow that washes out plaque" not the answer?

Smoking does not enhance salivary clearance of plaque and is linked with more plaque, not less.

What concept does this question test?

It tests Caries, pulp and periodontal disease: smoking masks gingival signs in Dentistry. Absence of bleeding therefore does not mean periodontal health in a smoker.

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 Caries, pulp and periodontal disease: smoking masks gingival signs?

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.