Dental materials and radiology: cone beam CT: 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 · Dental materials and radiology: cone beam CT

Sample item

Which statement about cone beam CT in dentistry is correct?

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

The answer and the reasoning

C. It gives three-dimensional images of the jaws with lower dose than medical CT

CBCT gives isotropic three-dimensional images of hard tissues at a lower dose than conventional multislice CT. Soft tissue contrast is poor.

Option by option

  • A. It cannot show impacted teeth

    It is excellent for locating impacted teeth.

  • B. It displays soft tissue better than MRI

    Soft tissue resolution is poor compared with MRI.

  • C. It gives three-dimensional images of the jaws with lower dose than medical CT (correct)

    Correct. Lower dose three-dimensional imaging is its advantage.

  • D. It uses no ionising radiation

    CBCT uses X-rays and so is ionising.

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, It gives three-dimensional images of the jaws with lower dose than medical CT. CBCT gives isotropic three-dimensional images of hard tissues at a lower dose than conventional multislice CT.

Why is "It cannot show impacted teeth" not the answer?

It is excellent for locating impacted teeth.

Why is "It displays soft tissue better than MRI" not the answer?

Soft tissue resolution is poor compared with MRI.

Why is "It uses no ionising radiation" not the answer?

CBCT uses X-rays and so is ionising.

What concept does this question test?

It tests Dental materials and radiology: cone beam CT in Dentistry. Soft tissue contrast is poor.

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 Dental materials and radiology: cone beam CT?

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.