Orthodontics: Angle Class II: 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: Angle Class II

Sample item

In Angle Class II malocclusion, how is the permanent first molar relationship described?

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

The answer and the reasoning

C. Mesiobuccal cusp of upper molar lies anterior to the buccal groove of lower molar

In Class II, the lower molar is distal relative to the upper molar, so the upper mesiobuccal cusp sits mesial to the lower buccal groove. Class I has the cusp in the groove and Class III has the lower molar mesial.

Option by option

  • A. Mesiobuccal cusp lies posterior to the buccal groove

    This describes Class III.

  • B. Mesiobuccal cusp lies exactly in the buccal groove

    This is the normal Class I relationship.

  • C. Mesiobuccal cusp of upper molar lies anterior to the buccal groove of lower molar (correct)

    Correct. This describes Class II.

  • D. There is no contact between the first molars

    This does not define any Angle class.

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, Mesiobuccal cusp of upper molar lies anterior to the buccal groove of lower molar. In Class II, the lower molar is distal relative to the upper molar, so the upper mesiobuccal cusp sits mesial to the lower buccal groove.

Why is "Mesiobuccal cusp lies posterior to the buccal groove" not the answer?

This describes Class III.

Why is "Mesiobuccal cusp lies exactly in the buccal groove" not the answer?

This is the normal Class I relationship.

Why is "There is no contact between the first molars" not the answer?

This does not define any Angle class.

What concept does this question test?

It tests Orthodontics: Angle Class II in Dentistry. Class I has the cusp in the groove and Class III has the lower molar mesial.

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: Angle Class II?

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.