Orthodontics and paediatric dentistry: lip bumper: 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: lip bumper

Sample item

A 13-year-old has mild lower arch crowding and a strong lower lip that presses on the lower incisors and molars. Which appliance gains arch length by removing this pressure?

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

The answer and the reasoning

B. Lip bumper

A lip bumper holds the lip away from the lower incisors and passes the lip force to the molar bands, which tips the molars distally, while removal of lip pressure lets the incisors procline and the arch widen. It gains a few millimetres of arch length. A quad helix expands the upper arch, and a chin cup restrains the mandible.

Option by option

  • A. Quad helix

    A quad helix expands the maxillary arch and acts on the upper molars.

  • B. Lip bumper (correct)

    Correct. A lip bumper removes lip pressure and lets the lower arch gain space.

  • C. Transpalatal arch

    A transpalatal arch stabilises the upper molars across the palate.

  • D. Chin cup

    A chin cup directs force to the mandible and does not create lower 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.

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Questions about this Dentistry question

What is the answer to this Dentistry question?

The best answer is B, Lip bumper. A lip bumper holds the lip away from the lower incisors and passes the lip force to the molar bands, which tips the molars distally, while removal of lip pressure lets the incisors procline and the arch widen.

Why is "Quad helix" not the answer?

A quad helix expands the maxillary arch and acts on the upper molars.

Why is "Transpalatal arch" not the answer?

A transpalatal arch stabilises the upper molars across the palate.

Why is "Chin cup" not the answer?

A chin cup directs force to the mandible and does not create lower arch space.

What concept does this question test?

It tests Orthodontics and paediatric dentistry: lip bumper in Dentistry. It gains a few millimetres of arch length. A quad helix expands the upper arch, and a chin cup restrains the mandible.

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 and paediatric dentistry: lip bumper?

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.