Orthodontics: crossbite: 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: crossbite

Sample item

What is a posterior crossbite?

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

The answer and the reasoning

D. Maxillary posterior teeth occlude lingual to mandibular posterior teeth

In posterior crossbite, the transverse relationship is reversed so maxillary posterior teeth lie lingual to mandibular teeth. It may arise from skeletal, dental, or functional factors.

Option by option

  • A. Only incisors have crowding

    Crowding concerns arch-length discrepancy.

  • B. A gap between central incisors

    A midline gap is a diastema.

  • C. All maxillary teeth are absent

    Tooth absence is not the definition.

  • D. Maxillary posterior teeth occlude lingual to mandibular posterior teeth (correct)

    Correct. This defines reversal of normal transverse posterior occlusion.

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, Maxillary posterior teeth occlude lingual to mandibular posterior teeth. In posterior crossbite, the transverse relationship is reversed so maxillary posterior teeth lie lingual to mandibular teeth.

Why is "Only incisors have crowding" not the answer?

Crowding concerns arch-length discrepancy.

Why is "A gap between central incisors" not the answer?

A midline gap is a diastema.

Why is "All maxillary teeth are absent" not the answer?

Tooth absence is not the definition.

What concept does this question test?

It tests Orthodontics: crossbite in Dentistry. It may arise from skeletal, dental, or functional factors.

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: crossbite?

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.