How do root lesions appear on proximal surfaces in cervical areas on radiographs?

How do root lesions appear on proximal surfaces in cervical areas on radiographs?

• A. Radiolucent, saucer-shaped defects
• B. Radiopaque, wedge-shaped defects
• C. Circular radiolucencies
• D. Linear radiolucencies

Answer: (A)

Root surface caries on proximal cervical areas appear on radiographs as radiolucent, saucer-shaped defects. This pattern reflects demineralization of the cementum and dentin at the cervical root surface, where there is no enamel barrier to protect the area. The lesion tends to start near the cementoenamel junction and spread laterally along the root, creating a shallow, rounded concavity with smooth, concave margins—characteristic of a saucer-like appearance on bitewing images. Radiolucent lesions are darker on the film due to mineral loss, whereas radiopaque patterns or circular/linear shapes don’t fit how root caries typically progress.

Root surface caries on proximal cervical areas appear on radiographs as radiolucent, saucer-shaped defects. This pattern reflects demineralization of the cementum and dentin at the cervical root surface, where there is no enamel barrier to protect the area. The lesion tends to start near the cementoenamel junction and spread laterally along the root, creating a shallow, rounded concavity with smooth, concave margins—characteristic of a saucer-like appearance on bitewing images. Radiolucent lesions are darker on the film due to mineral loss, whereas radiopaque patterns or circular/linear shapes don’t fit how root caries typically progress.