On a dental radiograph, which of the following would appear RADIOLUCENT (dark)?

Radiolucent structures let more X-rays through and appear dark. A fluid or soft-tissue lesion such as a cyst or abscess is radiolucent, whereas dense enamel and metallic restorations (amalgam, gold) are radiopaque (light).Other options: Enamel is the most radiopaque tooth tissue; amalgam and gold are metals and are radiopaque.Key exam takeaway: Dense material and metal are radiopaque (light); air, fluid, and soft-tissue lesions are radiolucent (dark).