Community dentistry: CPI code 2: 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 · Community dentistry: CPI code 2

Sample item

In a WHO periodontal survey using the community periodontal index probe, subgingival calculus is felt and the black band is fully visible. What score is recorded for the sextant?

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

The answer and the reasoning

D. Code 2

In the community periodontal index, code 0 is healthy, code 1 is bleeding after gentle probing, code 2 is calculus felt or seen with the black band fully visible, code 3 is a pocket of 4 to 5 mm with the band partly visible, and code 4 is a pocket of 6 mm or more with the band not visible.

Option by option

  • A. Code 4

    Code 4 requires a pocket of 6 mm or more, with the band not visible.

  • B. Code 3

    Code 3 requires a 4 to 5 mm pocket, with the black band partly covered.

  • C. Code 1

    Code 1 records bleeding without calculus as the worst finding.

  • D. Code 2 (correct)

    Correct. Calculus with the black band fully visible is code 2.

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, Code 2. In the community periodontal index, code 0 is healthy, code 1 is bleeding after gentle probing, code 2 is calculus felt or seen with the black band fully visible, code 3 is a pocket of 4 to 5 mm with the band partly visible, and code 4 is a pocket of 6 mm or more with the band not visible.

Why is "Code 4" not the answer?

Code 4 requires a pocket of 6 mm or more, with the band not visible.

Why is "Code 3" not the answer?

Code 3 requires a 4 to 5 mm pocket, with the black band partly covered.

Why is "Code 1" not the answer?

Code 1 records bleeding without calculus as the worst finding.

What concept does this question test?

It tests Community dentistry: CPI code 2 in Dentistry. The correct option holds because: Correct. Calculus with the black band fully visible is code 2.

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 Community dentistry: CPI code 2?

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.