Free NBDE Part II Oral Radiology Question Bank

Free NBDE Part II Oral Radiology Question Bank

Oral Radiology or oral and maxillofacial radiology is the branch of the dentistry in which diagnostic imaging techniques are being utilized for examination of the structures in the head and neck region for diagnosing various defects. disorders and diseases occurring in the region.

Question 1: Which of the following radioactive isotope is predominantly a Beta emitter?

A. 125 iodine

B. 99m Technetium

C. 32 phosphorus

D. 51 chromium

Answer & Explanation

Answer: [C]


Question 2: Which of the following term is used to describe one unit of electromagnetic radiation?

A. Quota

B. Proton

C. Particle

D. Photon

Answer & Explanation

Answer: [D]


Question 3: Which of the following statement is CORRECT regarding the increasing the density of the X-rays?

Increasing the mA, KVp or exposure time increases the density of the X-rays

Reducing the distance between focal point and film also increases the X-ray density



A. Both statements are correct

B. Both statements are incorrect

C. First statement is correct while second statement is incorrect

D. First statement is incorrect while second statement is correct

Answer & Explanation

Answer: [A]


Question 4: In which year Wilhelm Roentgen discovered X-rays?

A. 1875

B. 1895

C. 1985

D. 1975

Answer & Explanation

Answer: [B]


Question 5: Which of the following factor is/are considered important risk factors for osteoradionecrosis?

A. Damage to lymphatics

B. Damage to periosteum

C. Endarteritis of blood vessels

D. All of the above

Answer & Explanation

Answer: [C]

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