Orthodontics: ideal orthodontic force: 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: ideal orthodontic force

Sample item

A bracket is bonded to a canine and a very heavy archwire force is applied. What is the likely biological result?

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

The answer and the reasoning

B. Hyalinisation and undermining resorption with delayed movement

Heavy forces occlude the periodontal ligament blood supply, causing a hyalinised sterile necrotic zone and delaying movement until undermining resorption clears it. Light continuous force gives efficient movement.

Option by option

  • A. Increased bone deposition on the pressure side

    Bone is resorbed, not deposited, on the pressure side.

  • B. Hyalinisation and undermining resorption with delayed movement (correct)

    Correct. Excess force causes hyalinisation and slows movement.

  • C. Faster tooth movement

    Heavy force slows rather than speeds movement.

  • D. No effect on the periodontal ligament

    The ligament is clearly affected by force.

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, Hyalinisation and undermining resorption with delayed movement. Heavy forces occlude the periodontal ligament blood supply, causing a hyalinised sterile necrotic zone and delaying movement until undermining resorption clears it.

Why is "Increased bone deposition on the pressure side" not the answer?

Bone is resorbed, not deposited, on the pressure side.

Why is "Faster tooth movement" not the answer?

Heavy force slows rather than speeds movement.

Why is "No effect on the periodontal ligament" not the answer?

The ligament is clearly affected by force.

What concept does this question test?

It tests Orthodontics: ideal orthodontic force in Dentistry. Light continuous force gives efficient movement.

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: ideal orthodontic force?

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.