Radiology · single question
How do you determine the number of missing teeth? (Image-dependent question — verify on the actual radiograph.)
A panoramic radiograph was provided in the exam.
Show answer and explanation
Correct answer: A. Count systematically by quadrant against the full complement of 32 (or 20 primary) teeth
This item requires the actual radiograph. Use a systematic quadrant count vs. the expected dentition to get the number.
- A. Correct method. Work quadrant by quadrant in a fixed order, compare present teeth to the expected dentition, and subtract — the exact number depends on the radiograph shown.
- B. Unsystematic counting causes errors; always use a quadrant-by-quadrant method.