Recurrent or residual caries appear as a radiolucent area with diffuse margins beneath or adjacent to a restoration. What term describes this radiographic feature?

Recurrent or residual caries appear as a radiolucent area with diffuse margins beneath or adjacent to a restoration. What term describes this radiographic feature?

• A. Recurrent or residual
• B. Occlusal
• C. Proximal
• D. Root surface

Answer: (A)

The situation described is recurrent or residual caries. When decay continues or reappears under or right next to an existing restoration, the radiographic sign is a radiolucent area with diffuse, poorly defined borders located beneath or adjacent to the restoration. This pattern reflects demineralization occurring at the restoration margin or underneath, rather than a new lesion on a non-restored surface. It’s different from occlusal, proximal, or root surface caries, which indicate decay on those specific surfaces rather than around a restored margin.

The situation described is recurrent or residual caries. When decay continues or reappears under or right next to an existing restoration, the radiographic sign is a radiolucent area with diffuse, poorly defined borders located beneath or adjacent to the restoration. This pattern reflects demineralization occurring at the restoration margin or underneath, rather than a new lesion on a non-restored surface. It’s different from occlusal, proximal, or root surface caries, which indicate decay on those specific surfaces rather than around a restored margin.