Cariology and Prevention 2 Practice Test

In radiographs, not every dark area means decay—cervical burnout is a classic artifact seen at the cervical portion of a tooth. It shows up as a radiolucent band in dentin where the root region near the CEJ sits under the alveolar bone and the crown is enamel-heavy. The difference in density between enamel and dentin, plus the angle and overlap with bone, creates this lighter/darker region that can mimic root caries on bitewing images.

This pattern is the best answer because it is a well-known imaging artifact, not actual demineralization. It tends to appear specifically at the junction between the crown’s enamel and the root area under bone, producing a smooth, wedge-shaped radiolucency that resembles caries but lacks the clinical features of true decay. The other options describe real conditions or wear patterns (abrasion, attrition) or decay adjacent to restorations (recurrent caries), which do not match the described radiographic appearance in this cervical zone.