Oral histology and anatomy: Tomes process: 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: Tomes process

Sample item

Electron microscopy of a secretory-stage ameloblast shows a distal projection whose shape determines the pattern of enamel rods. What is this structure called?

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

The answer and the reasoning

D. Tomes process

The Tomes process is the distal extension of the secretory ameloblast and shapes the enamel prisms and interprismatic enamel. It is lost when the ameloblast enters the maturation stage.

Option by option

  • A. Odontoblast process

    The odontoblast process lies in the dentine tubule and forms dentine.

  • B. Sharpey fibre

    Sharpey fibres are collagen bundles embedded in cementum and bone.

  • C. Hertwig's sheath

    Hertwig's epithelial root sheath guides root formation, not enamel.

  • D. Tomes process (correct)

    Correct. The Tomes process of the ameloblast sculpts the rod pattern.

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, Tomes process. The Tomes process is the distal extension of the secretory ameloblast and shapes the enamel prisms and interprismatic enamel.

Why is "Odontoblast process" not the answer?

The odontoblast process lies in the dentine tubule and forms dentine.

Why is "Sharpey fibre" not the answer?

Sharpey fibres are collagen bundles embedded in cementum and bone.

Why is "Hertwig's sheath" not the answer?

Hertwig's epithelial root sheath guides root formation, not enamel.

What concept does this question test?

It tests Oral histology and anatomy: Tomes process in Dentistry. It is lost when the ameloblast enters the maturation stage.

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: Tomes process?

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.