BU DENTAL RADIOLOGY EXAM WITH REAL EXAM STUDY GUIDE QUESTIONS AND ANSWERS

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BU DENTAL RADIOLOGY EXAM WITH REAL EXAM
STUDY GUIDE QUESTIONS AND ANSWERS 2026 JUST
RELEASED VERSION




◉ Periapical Film. Answer: Used to show root apex of
tooth and surrounding structures


◉ Bitewing exposure. Answer: Used to detect interproximal
decay and height of alveolar bone


◉ Occlusial. Answer: Used to view cross section of the
teeth and complete palatal structure or floor of mouth


◉ 5 safety precautions for operator. Answer: 1) Never
hold film in patients mouth
2) Stand behind a protective barrier

3) stand 6 feet away from x-ray unit

4) Never stand in direct line of primary beam

5) Use lead lined open cone

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◉ Care of x-ray unit. Answer: 1) Don't force unit arm to be
extended

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2) Don't leave the arm extended after use

3) allow 5 seconds between exposures to let the tube cool

4) Don't let the tube head hit the wall

5) always turn off unit when finished



◉ Inverse Square Law. Answer: Using a longer target object
diminishes intensity of radiation


◉ Horizontal angulation (Parallel Technique). Answer: Central
ray must pass through the teeth parallel to the proximal
surfaces


◉ Vertical Angulation (Parallel Technique). Answer: The film is
parallel to the long axis of the teeth


◉ Elongation. Answer: Vertical angulation too low



◉ Foreshortening. Answer: Vertical angulation too high



◉ Overlapping. Answer: Result of incorrect horizontal
angualtion