Orthodontics and paediatric dentistry: retention: 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 and paediatric dentistry: retention

Sample item

After correction of a rotated upper incisor, relapse is greatest. Which tissue is considered chiefly responsible for rotational relapse?

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

The answer and the reasoning

C. Supracrestal gingival fibres

Supracrestal gingival fibres remodel slowly and recoil to pull rotated teeth back. Pericision, which severs them, or prolonged retention reduces relapse.

Option by option

  • A. Transseptal collagen of the dentine

    Dentine collagen is not part of the periodontal fibre system.

  • B. Enamel prisms

    Enamel prisms are mineral structures that do not pull teeth.

  • C. Supracrestal gingival fibres (correct)

    Correct. Supracrestal fibres recoil after rotation.

  • D. Cementum cells

    Cementum cells do not generate recoil forces.

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 C, Supracrestal gingival fibres. Supracrestal gingival fibres remodel slowly and recoil to pull rotated teeth back.

Why is "Transseptal collagen of the dentine" not the answer?

Dentine collagen is not part of the periodontal fibre system.

Why is "Enamel prisms" not the answer?

Enamel prisms are mineral structures that do not pull teeth.

Why is "Cementum cells" not the answer?

Cementum cells do not generate recoil forces.

What concept does this question test?

It tests Orthodontics and paediatric dentistry: retention in Dentistry. Pericision, which severs them, or prolonged retention reduces relapse.

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 Orthodontics and paediatric dentistry: retention?

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.