Caries, pulp and periodontal disease: intrabony defects: 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: intrabony defects

Sample item

Which kind of periodontal bone defect has the best prognosis for regeneration with a bone graft or guided tissue regeneration?

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

The answer and the reasoning

A. Narrow three-wall intrabony defect

A narrow defect with three bony walls retains and protects the graft and blood clot. Wide, shallow or horizontal defects give poor results.

Option by option

  • A. Narrow three-wall intrabony defect (correct)

    Correct. Three walls contain the graft and support regeneration.

  • B. Wide one-wall defect

    A one-wall defect has little containment and has poor results.

  • C. Horizontal bone loss

    Horizontal loss has no walls to hold a graft.

  • D. Class III furcation involvement

    A through-and-through furcation defect is hard to regenerate.

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.

More Dentistry questions

Questions about this Dentistry question

What is the answer to this Dentistry question?

The best answer is A, Narrow three-wall intrabony defect. A narrow defect with three bony walls retains and protects the graft and blood clot.

Why is "Wide one-wall defect" not the answer?

A one-wall defect has little containment and has poor results.

Why is "Horizontal bone loss" not the answer?

Horizontal loss has no walls to hold a graft.

Why is "Class III furcation involvement" not the answer?

A through-and-through furcation defect is hard to regenerate.

What concept does this question test?

It tests Caries, pulp and periodontal disease: intrabony defects in Dentistry. Wide, shallow or horizontal defects give poor results.

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: intrabony defects?

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.