Community dentistry: Dean's fluorosis index: 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: Dean's fluorosis index

Sample item

Which index is used for community surveys of dental fluorosis, from normal to severe?

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

The answer and the reasoning

C. Dean's index

Dean's fluorosis index grades enamel as normal, questionable, very mild, mild, moderate and severe, and gives a community fluorosis index.

Option by option

  • A. OHI-S

    OHI-S measures debris and calculus.

  • B. Russell's periodontal index

    Russell's index measures periodontal disease.

  • C. Dean's index (correct)

    Correct. Dean's index measures fluorosis.

  • D. Loe and Silness index

    Loe and Silness is a gingival index.

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, Dean's index. Dean's fluorosis index grades enamel as normal, questionable, very mild, mild, moderate and severe, and gives a community fluorosis index.

Why is "OHI-S" not the answer?

OHI-S measures debris and calculus.

Why is "Russell's periodontal index" not the answer?

Russell's index measures periodontal disease.

Why is "Loe and Silness index" not the answer?

Loe and Silness is a gingival index.

What concept does this question test?

It tests Community dentistry: Dean's fluorosis index in Dentistry. The correct option holds because: Correct. Dean's index measures fluorosis.

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: Dean's fluorosis index?

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.