Oral histology and anatomy: interglobular dentine: 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 · Oral histology and anatomy: interglobular dentine

Sample item

A child with vitamin D-resistant rickets has teeth in which histology reveals large unmineralised areas between calcospherites in the dentine. What is this finding called?

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

The answer and the reasoning

A. Interglobular dentine

Interglobular dentine arises when mineralisation fails to fuse calcospherites, as in vitamin D deficiency or excess fluoride. The tubules continue through these areas.

Option by option

  • A. Interglobular dentine (correct)

    Correct. Failure of calcospherite fusion produces interglobular spaces.

  • B. Tomes granular layer

    Tomes granular layer is a small zone beneath cementum in the root.

  • C. Dead tracts

    Dead tracts are tubules emptied of odontoblast processes, usually from wear or caries.

  • D. Sclerotic dentine

    Sclerotic dentine is tubule obliteration by mineral, not failed mineralisation.

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 A, Interglobular dentine. Interglobular dentine arises when mineralisation fails to fuse calcospherites, as in vitamin D deficiency or excess fluoride.

Why is "Tomes granular layer" not the answer?

Tomes granular layer is a small zone beneath cementum in the root.

Why is "Dead tracts" not the answer?

Dead tracts are tubules emptied of odontoblast processes, usually from wear or caries.

Why is "Sclerotic dentine" not the answer?

Sclerotic dentine is tubule obliteration by mineral, not failed mineralisation.

What concept does this question test?

It tests Oral histology and anatomy: interglobular dentine in Dentistry. The tubules continue through these areas.

How hard is this question?

We tag it as a multi-step question: it asks you to combine more than one idea. 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 Oral histology and anatomy: interglobular dentine?

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.