The same child has a proximal carious lesion on another tooth that is radiographically into dentin. What is the appropriate treatment?

Correct answer: B. Restoration of the lesion

• A. Incorrect. Sealants are for pits and fissures and cannot be applied to a proximal surface.
• B. Per the recall source. A proximal lesion radiographically extending into dentin has passed the threshold for remineralisation and requires operative restoration.
• C. Incorrect on this reading. SDF arrests lesions but is reserved for situations where restoration is impractical — behaviour management difficulty, medical complexity, or an interim measure.
• D. Incorrect. Observation is appropriate for enamel-only (E1/E2) lesions, not for dentin involvement.

Note: ⚠️ Depth determines the answer. Enamel-only (E1/E2) → remineralise and monitor. Outer dentin (D1) → judgement call, often restore. Middle/inner dentin (D2/D3) → restore. Confirm the radiographic depth described in the exam stem.