Orthodontics: 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 · Orthodontics

Sample item

What does crowding in a dental arch mean?

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

The answer and the reasoning

B. Insufficient arch space for the combined tooth widths

Dental crowding occurs when available arch perimeter is less than the space needed for properly aligned teeth, causing overlap or rotation.

Option by option

  • A. Excessive periodontal pocket depth only

    Pocket depth describes periodontal support, not tooth alignment.

  • B. Insufficient arch space for the combined tooth widths (correct)

    Correct: a tooth-size to arch-length discrepancy produces crowding.

  • C. A fracture through the mandibular angle

    Mandibular fracture is unrelated to routine crowding.

  • D. Loss of pulp vitality in several teeth

    Pulp vitality does not determine arch space.

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.

More Dentistry questions

Questions about this Dentistry question

What is the answer to this Dentistry question?

The best answer is B, Insufficient arch space for the combined tooth widths. Dental crowding occurs when available arch perimeter is less than the space needed for properly aligned teeth, causing overlap or rotation.

Why is "Excessive periodontal pocket depth only" not the answer?

Pocket depth describes periodontal support, not tooth alignment.

Why is "A fracture through the mandibular angle" not the answer?

Mandibular fracture is unrelated to routine crowding.

Why is "Loss of pulp vitality in several teeth" not the answer?

Pulp vitality does not determine arch space.

What concept does this question test?

It tests Orthodontics in Dentistry. The correct option holds because: Correct: a tooth-size to arch-length discrepancy produces crowding.

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 Orthodontics?

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.