Most Radiopaque Restorative Material — NDEB AFK MCQ
Instant feedback + full explanation. One question, done properly.
Educational content. Not a substitute for clinical judgement or local policy.
Reveal the answer and explanation
Correct answer: C — Dental amalgam
Dental amalgam is the most radiopaque commonly used restorative material due to its high metal content (silver, tin, copper, mercury — all high atomic number elements that attenuate X-rays effectively). It appears intensely white on radiographs. Composite resins contain radiopaque fillers (barium glass, strontium glass, zirconia) but are less radiopaque than amalgam. GIC is moderately radiopaque. ZOE and calcium hydroxide are relatively radiolucent. Radiopacity is important for detecting secondary caries, recurrent decay, and restoration integrity on radiographs.
Reference: White & Pharoah – Oral Radiology: Principles and Interpretation, 8th ed., 2019