Which of the following is a reason to prescribe radiographs?

• A. Past caries incidence
• B. Oral hygiene
• C. Age
• D. Suspicion of caries

Answer: (D)

Radiographs are prescribed when there is suspicion of caries because decay can hide between teeth or under restorations and may not be visible in a clinical exam alone. Imaging provides a direct view of lesions that are otherwise hidden, helping to confirm their presence, determine their extent, and guide appropriate treatment. Past caries history, oral hygiene, or age describe risk or population characteristics but do not by themselves prove there is an active lesion needing imaging. That direct diagnostic need is why suspicion of caries is the most appropriate reason to order radiographs.