Tooth development and dental anatomy: root dilaceration: 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 · Tooth development and dental anatomy: root dilaceration

Sample item

A child's upper central incisor fails to erupt after the primary incisor was intruded in a fall at 2 years. A radiograph shows a sharply bent root. What is this anomaly?

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

The answer and the reasoning

A. Dilaceration

Dilaceration is an abrupt angulation of the crown or root, often following trauma to the primary predecessor that displaces the developing tooth germ. It can block eruption.

Option by option

  • A. Dilaceration (correct)

    Correct. Trauma displaced the developing tooth germ, bending the root.

  • B. Hypercementosis

    Hypercementosis is thickening of cementum, usually without sharp bending.

  • C. Taurodontism

    Taurodontism affects molar pulp chamber shape.

  • D. Dens evaginatum

    Dens evaginatum is an extra cusp on the occlusal surface.

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, Dilaceration. Dilaceration is an abrupt angulation of the crown or root, often following trauma to the primary predecessor that displaces the developing tooth germ.

Why is "Hypercementosis" not the answer?

Hypercementosis is thickening of cementum, usually without sharp bending.

Why is "Taurodontism" not the answer?

Taurodontism affects molar pulp chamber shape.

Why is "Dens evaginatum" not the answer?

Dens evaginatum is an extra cusp on the occlusal surface.

What concept does this question test?

It tests Tooth development and dental anatomy: root dilaceration in Dentistry. It can block eruption.

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 Tooth development and dental anatomy: root dilaceration?

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.